./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/prefixsum_iter.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_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/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_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_iter.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/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_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/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 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 04:36:02,022 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 04:36:02,104 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 04:36:02,111 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 04:36:02,112 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 04:36:02,144 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 04:36:02,145 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 04:36:02,145 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 04:36:02,146 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 04:36:02,147 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 04:36:02,148 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 04:36:02,148 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 04:36:02,149 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 04:36:02,150 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 04:36:02,150 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 04:36:02,151 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 04:36:02,152 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 04:36:02,152 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 04:36:02,153 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 04:36:02,153 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 04:36:02,154 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 04:36:02,155 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 04:36:02,155 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 04:36:02,156 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 04:36:02,156 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 04:36:02,157 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 04:36:02,157 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 04:36:02,158 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 04:36:02,158 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 04:36:02,159 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 04:36:02,159 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 04:36:02,160 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:36:02,160 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 04:36:02,161 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 04:36:02,161 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 04:36:02,162 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 04:36:02,162 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 04:36:02,163 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 04:36:02,163 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 04:36:02,164 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 04:36:02,164 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 04:36:02,164 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 04:36:02,165 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_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d [2023-11-29 04:36:02,445 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 04:36:02,472 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 04:36:02,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 04:36:02,477 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 04:36:02,478 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 04:36:02,479 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/verifythis/prefixsum_iter.c [2023-11-29 04:36:05,568 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 04:36:05,767 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 04:36:05,767 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/sv-benchmarks/c/verifythis/prefixsum_iter.c [2023-11-29 04:36:05,776 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/data/1453540ba/5e6cfbe9924f436f8beba521e928e833/FLAG62c6e3b35 [2023-11-29 04:36:05,793 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/data/1453540ba/5e6cfbe9924f436f8beba521e928e833 [2023-11-29 04:36:05,795 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 04:36:05,797 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 04:36:05,798 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 04:36:05,799 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 04:36:05,805 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 04:36:05,806 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:36:05" (1/1) ... [2023-11-29 04:36:05,807 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@788dfa0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:36:05, skipping insertion in model container [2023-11-29 04:36:05,808 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:36:05" (1/1) ... [2023-11-29 04:36:05,833 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:36:05,983 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_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2023-11-29 04:36:06,019 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:36:06,033 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 04:36:06,046 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_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2023-11-29 04:36:06,065 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:36:06,081 INFO L206 MainTranslator]: Completed translation [2023-11-29 04:36:06,082 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:36:06 WrapperNode [2023-11-29 04:36:06,082 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 04:36:06,083 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 04:36:06,083 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 04:36:06,084 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 04:36:06,091 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:36:06" (1/1) ... [2023-11-29 04:36:06,102 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:36:06" (1/1) ... [2023-11-29 04:36:06,133 INFO L138 Inliner]: procedures = 22, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 129 [2023-11-29 04:36:06,134 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 04:36:06,135 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 04:36:06,135 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 04:36:06,135 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 04:36:06,148 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:36:06" (1/1) ... [2023-11-29 04:36:06,148 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:36:06" (1/1) ... [2023-11-29 04:36:06,153 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:36:06" (1/1) ... [2023-11-29 04:36:06,175 INFO L175 MemorySlicer]: Split 16 memory accesses to 2 slices as follows [2, 14]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 6 writes are split as follows [0, 6]. [2023-11-29 04:36:06,176 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:36:06" (1/1) ... [2023-11-29 04:36:06,176 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:36:06" (1/1) ... [2023-11-29 04:36:06,187 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:36:06" (1/1) ... [2023-11-29 04:36:06,193 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:36:06" (1/1) ... [2023-11-29 04:36:06,196 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:36:06" (1/1) ... [2023-11-29 04:36:06,198 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:36:06" (1/1) ... [2023-11-29 04:36:06,202 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 04:36:06,203 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 04:36:06,203 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 04:36:06,204 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 04:36:06,205 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:36:06" (1/1) ... [2023-11-29 04:36:06,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:36:06,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:36:06,245 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 04:36:06,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 04:36:06,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 04:36:06,293 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 04:36:06,294 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 04:36:06,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 04:36:06,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 04:36:06,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 04:36:06,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 04:36:06,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 04:36:06,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 04:36:06,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 04:36:06,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 04:36:06,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 04:36:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-29 04:36:06,296 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-29 04:36:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 04:36:06,414 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 04:36:06,416 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 04:36:06,677 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 04:36:06,727 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 04:36:06,728 INFO L309 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-29 04:36:06,729 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:36:06 BoogieIcfgContainer [2023-11-29 04:36:06,729 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 04:36:06,733 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 04:36:06,733 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 04:36:06,738 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 04:36:06,738 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 04:36:05" (1/3) ... [2023-11-29 04:36:06,739 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@394a6814 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:36:06, skipping insertion in model container [2023-11-29 04:36:06,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:36:06" (2/3) ... [2023-11-29 04:36:06,740 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@394a6814 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:36:06, skipping insertion in model container [2023-11-29 04:36:06,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:36:06" (3/3) ... [2023-11-29 04:36:06,742 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2023-11-29 04:36:06,768 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 04:36:06,769 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 04:36:06,854 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:36:06,862 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;@5d098202, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:36:06,863 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 04:36:06,867 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 27 states have internal predecessors, (43), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 04:36:06,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 04:36:06,888 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:36:06,889 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:36:06,890 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:36:06,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:36:06,896 INFO L85 PathProgramCache]: Analyzing trace with hash 347330670, now seen corresponding path program 1 times [2023-11-29 04:36:06,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:36:06,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138874564] [2023-11-29 04:36:06,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:06,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:36:07,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:07,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:36:07,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:07,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 04:36:07,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:07,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 04:36:07,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:07,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 04:36:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:07,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:36:07,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:36:07,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138874564] [2023-11-29 04:36:07,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138874564] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:36:07,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:36:07,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:36:07,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363616890] [2023-11-29 04:36:07,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:36:07,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:36:07,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:36:07,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:36:07,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:36:07,233 INFO L87 Difference]: Start difference. First operand has 34 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 27 states have internal predecessors, (43), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 04:36:07,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:36:07,325 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2023-11-29 04:36:07,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:36:07,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-11-29 04:36:07,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:36:07,338 INFO L225 Difference]: With dead ends: 66 [2023-11-29 04:36:07,338 INFO L226 Difference]: Without dead ends: 32 [2023-11-29 04:36:07,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:36:07,347 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 3 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:36:07,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 53 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:36:07,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-29 04:36:07,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-29 04:36:07,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 04:36:07,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-11-29 04:36:07,389 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 32 [2023-11-29 04:36:07,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:36:07,390 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-11-29 04:36:07,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 04:36:07,390 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-11-29 04:36:07,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 04:36:07,393 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:36:07,393 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:36:07,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 04:36:07,394 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:36:07,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:36:07,395 INFO L85 PathProgramCache]: Analyzing trace with hash 116060780, now seen corresponding path program 1 times [2023-11-29 04:36:07,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:36:07,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213789614] [2023-11-29 04:36:07,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:07,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:36:07,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:07,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:36:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:07,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 04:36:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:07,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 04:36:07,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:07,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 04:36:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:07,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:36:07,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:36:07,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213789614] [2023-11-29 04:36:07,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213789614] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:36:07,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:36:07,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 04:36:07,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541271455] [2023-11-29 04:36:07,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:36:07,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:36:07,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:36:07,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:36:07,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:36:07,885 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:36:08,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:36:08,047 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2023-11-29 04:36:08,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:36:08,048 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2023-11-29 04:36:08,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:36:08,050 INFO L225 Difference]: With dead ends: 50 [2023-11-29 04:36:08,050 INFO L226 Difference]: Without dead ends: 35 [2023-11-29 04:36:08,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-29 04:36:08,053 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 26 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:36:08,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 132 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:36:08,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-29 04:36:08,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2023-11-29 04:36:08,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 04:36:08,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2023-11-29 04:36:08,064 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 32 [2023-11-29 04:36:08,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:36:08,065 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2023-11-29 04:36:08,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:36:08,066 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2023-11-29 04:36:08,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-29 04:36:08,068 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:36:08,068 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:36:08,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 04:36:08,068 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:36:08,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:36:08,069 INFO L85 PathProgramCache]: Analyzing trace with hash 155328277, now seen corresponding path program 1 times [2023-11-29 04:36:08,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:36:08,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958182392] [2023-11-29 04:36:08,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:08,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:36:08,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:08,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:36:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:08,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 04:36:08,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:08,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 04:36:08,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:08,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 04:36:08,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:36:08,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:36:08,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958182392] [2023-11-29 04:36:08,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958182392] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:36:08,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659994691] [2023-11-29 04:36:08,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:08,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:08,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:36:08,816 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:36:08,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 04:36:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:08,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-29 04:36:08,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:36:09,219 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 04:36:09,324 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:36:09,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:36:09,358 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 13 [2023-11-29 04:36:09,363 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 14 treesize of output 12 [2023-11-29 04:36:09,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:36:09,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659994691] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:36:09,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:36:09,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 22 [2023-11-29 04:36:09,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873126629] [2023-11-29 04:36:09,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:36:09,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 04:36:09,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:36:09,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 04:36:09,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2023-11-29 04:36:09,458 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-29 04:36:10,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:36:10,084 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2023-11-29 04:36:10,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 04:36:10,084 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 33 [2023-11-29 04:36:10,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:36:10,086 INFO L225 Difference]: With dead ends: 64 [2023-11-29 04:36:10,086 INFO L226 Difference]: Without dead ends: 62 [2023-11-29 04:36:10,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 04:36:10,089 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 177 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:36:10,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 309 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:36:10,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-29 04:36:10,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2023-11-29 04:36:10,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 04:36:10,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2023-11-29 04:36:10,104 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 33 [2023-11-29 04:36:10,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:36:10,105 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2023-11-29 04:36:10,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-29 04:36:10,105 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2023-11-29 04:36:10,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 04:36:10,107 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:36:10,107 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:36:10,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 04:36:10,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:10,315 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:36:10,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:36:10,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1372620684, now seen corresponding path program 2 times [2023-11-29 04:36:10,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:36:10,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846382667] [2023-11-29 04:36:10,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:10,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:36:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:10,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:36:10,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:10,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 04:36:10,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:10,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 04:36:10,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:10,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 04:36:10,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:10,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:36:10,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:36:10,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846382667] [2023-11-29 04:36:10,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846382667] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:36:10,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192252210] [2023-11-29 04:36:10,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:36:10,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:10,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:36:10,574 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:36:10,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 04:36:10,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 04:36:10,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:36:10,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-29 04:36:10,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:36:10,750 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 16 treesize of output 12 [2023-11-29 04:36:10,918 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-11-29 04:36:10,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 45 treesize of output 23 [2023-11-29 04:36:10,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 04:36:10,941 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:36:10,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192252210] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:36:10,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:36:10,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2023-11-29 04:36:10,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563018995] [2023-11-29 04:36:10,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:36:10,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:36:10,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:36:10,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:36:10,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2023-11-29 04:36:10,944 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:36:11,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:36:11,205 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2023-11-29 04:36:11,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 04:36:11,206 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2023-11-29 04:36:11,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:36:11,209 INFO L225 Difference]: With dead ends: 82 [2023-11-29 04:36:11,209 INFO L226 Difference]: Without dead ends: 80 [2023-11-29 04:36:11,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:36:11,211 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 31 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:36:11,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 145 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:36:11,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-29 04:36:11,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 46. [2023-11-29 04:36:11,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 04:36:11,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2023-11-29 04:36:11,228 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 34 [2023-11-29 04:36:11,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:36:11,228 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2023-11-29 04:36:11,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:36:11,229 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2023-11-29 04:36:11,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-29 04:36:11,230 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:36:11,231 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:36:11,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 04:36:11,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-29 04:36:11,437 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:36:11,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:36:11,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1709789265, now seen corresponding path program 1 times [2023-11-29 04:36:11,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:36:11,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083200333] [2023-11-29 04:36:11,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:11,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:36:11,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:11,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:36:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:11,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 04:36:11,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:11,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 04:36:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:11,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 04:36:11,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:11,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:36:11,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:36:11,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083200333] [2023-11-29 04:36:11,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083200333] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:36:11,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485393767] [2023-11-29 04:36:11,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:11,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:11,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:36:11,655 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:36:11,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 04:36:11,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:11,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:36:11,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:36:11,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:36:11,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:36:11,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:36:11,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485393767] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:36:11,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:36:11,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 13 [2023-11-29 04:36:11,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811641150] [2023-11-29 04:36:11,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:36:11,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 04:36:11,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:36:11,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 04:36:11,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-11-29 04:36:11,957 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:36:12,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:36:12,144 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2023-11-29 04:36:12,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 04:36:12,145 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 36 [2023-11-29 04:36:12,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:36:12,147 INFO L225 Difference]: With dead ends: 70 [2023-11-29 04:36:12,147 INFO L226 Difference]: Without dead ends: 60 [2023-11-29 04:36:12,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:36:12,149 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 40 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:36:12,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 197 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:36:12,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-29 04:36:12,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2023-11-29 04:36:12,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 49 states have internal predecessors, (65), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 04:36:12,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2023-11-29 04:36:12,165 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 36 [2023-11-29 04:36:12,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:36:12,166 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2023-11-29 04:36:12,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:36:12,166 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2023-11-29 04:36:12,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 04:36:12,168 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:36:12,168 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:36:12,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 04:36:12,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:12,373 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:36:12,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:36:12,373 INFO L85 PathProgramCache]: Analyzing trace with hash -635961222, now seen corresponding path program 2 times [2023-11-29 04:36:12,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:36:12,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309877119] [2023-11-29 04:36:12,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:12,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:36:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:12,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:36:12,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:12,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 04:36:12,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:12,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 04:36:12,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:12,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 04:36:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 04:36:12,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:36:12,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309877119] [2023-11-29 04:36:12,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309877119] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:36:12,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146309258] [2023-11-29 04:36:12,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:36:12,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:12,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:36:12,578 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:36:12,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 04:36:12,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:36:12,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:36:12,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 04:36:12,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:36:12,796 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 04:36:12,796 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:36:12,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146309258] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:36:12,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:36:12,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-11-29 04:36:12,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775368503] [2023-11-29 04:36:12,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:36:12,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 04:36:12,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:36:12,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 04:36:12,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-11-29 04:36:12,799 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:36:12,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:36:12,913 INFO L93 Difference]: Finished difference Result 86 states and 111 transitions. [2023-11-29 04:36:12,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:36:12,913 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2023-11-29 04:36:12,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:36:12,915 INFO L225 Difference]: With dead ends: 86 [2023-11-29 04:36:12,915 INFO L226 Difference]: Without dead ends: 76 [2023-11-29 04:36:12,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-11-29 04:36:12,916 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:36:12,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 133 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:36:12,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-29 04:36:12,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 49. [2023-11-29 04:36:12,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 states have internal predecessors, (56), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 04:36:12,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2023-11-29 04:36:12,927 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 37 [2023-11-29 04:36:12,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:36:12,927 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2023-11-29 04:36:12,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:36:12,927 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2023-11-29 04:36:12,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 04:36:12,928 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:36:12,929 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:36:12,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 04:36:13,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:13,133 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:36:13,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:36:13,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1832489573, now seen corresponding path program 1 times [2023-11-29 04:36:13,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:36:13,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123805486] [2023-11-29 04:36:13,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:13,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:36:13,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:13,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:36:13,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:13,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 04:36:13,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:13,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 04:36:13,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:13,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 04:36:13,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 04:36:13,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:36:13,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123805486] [2023-11-29 04:36:13,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123805486] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:36:13,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106850320] [2023-11-29 04:36:13,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:13,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:13,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:36:13,339 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:36:13,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 04:36:13,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:13,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:36:13,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:36:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:36:13,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:36:13,577 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:36:13,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106850320] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:36:13,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:36:13,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2023-11-29 04:36:13,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470686088] [2023-11-29 04:36:13,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:36:13,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 04:36:13,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:36:13,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 04:36:13,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:36:13,581 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:36:13,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:36:13,970 INFO L93 Difference]: Finished difference Result 93 states and 126 transitions. [2023-11-29 04:36:13,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 04:36:13,971 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2023-11-29 04:36:13,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:36:13,972 INFO L225 Difference]: With dead ends: 93 [2023-11-29 04:36:13,972 INFO L226 Difference]: Without dead ends: 67 [2023-11-29 04:36:13,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2023-11-29 04:36:13,974 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 102 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:36:13,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 230 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:36:13,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-29 04:36:13,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2023-11-29 04:36:13,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 44 states have internal predecessors, (57), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 04:36:13,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2023-11-29 04:36:13,986 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 37 [2023-11-29 04:36:13,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:36:13,987 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2023-11-29 04:36:13,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:36:13,987 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2023-11-29 04:36:13,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 04:36:13,988 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:36:13,988 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:36:13,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 04:36:14,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:14,191 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:36:14,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:36:14,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1163402438, now seen corresponding path program 1 times [2023-11-29 04:36:14,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:36:14,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951781123] [2023-11-29 04:36:14,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:14,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:36:14,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:14,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:36:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:14,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 04:36:14,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:14,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 04:36:14,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:14,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 04:36:14,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:14,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:36:14,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:36:14,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951781123] [2023-11-29 04:36:14,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951781123] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:36:14,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489011613] [2023-11-29 04:36:14,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:14,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:14,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:36:14,365 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:36:14,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 04:36:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:14,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:36:14,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:36:14,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:36:14,498 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:36:14,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:36:14,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489011613] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:36:14,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:36:14,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 11 [2023-11-29 04:36:14,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146222929] [2023-11-29 04:36:14,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:36:14,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 04:36:14,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:36:14,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 04:36:14,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-29 04:36:14,547 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:36:14,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:36:14,680 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2023-11-29 04:36:14,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 04:36:14,680 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2023-11-29 04:36:14,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:36:14,681 INFO L225 Difference]: With dead ends: 58 [2023-11-29 04:36:14,681 INFO L226 Difference]: Without dead ends: 40 [2023-11-29 04:36:14,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-29 04:36:14,682 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 28 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:36:14,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 184 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:36:14,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-29 04:36:14,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2023-11-29 04:36:14,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 04:36:14,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2023-11-29 04:36:14,689 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 37 [2023-11-29 04:36:14,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:36:14,689 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2023-11-29 04:36:14,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:36:14,690 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2023-11-29 04:36:14,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 04:36:14,691 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:36:14,691 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:36:14,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 04:36:14,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:14,897 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:36:14,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:36:14,897 INFO L85 PathProgramCache]: Analyzing trace with hash -2140225731, now seen corresponding path program 1 times [2023-11-29 04:36:14,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:36:14,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457844964] [2023-11-29 04:36:14,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:14,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:36:14,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:15,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:36:15,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:15,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 04:36:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:15,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 04:36:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:15,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 04:36:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:15,133 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 04:36:15,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:36:15,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457844964] [2023-11-29 04:36:15,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457844964] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:36:15,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658574595] [2023-11-29 04:36:15,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:15,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:15,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:36:15,135 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:36:15,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 04:36:15,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:15,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 04:36:15,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:36:15,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 04:36:15,296 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:36:15,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658574595] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:36:15,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:36:15,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2023-11-29 04:36:15,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103723240] [2023-11-29 04:36:15,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:36:15,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:36:15,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:36:15,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:36:15,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-29 04:36:15,299 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:36:15,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:36:15,355 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2023-11-29 04:36:15,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:36:15,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2023-11-29 04:36:15,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:36:15,356 INFO L225 Difference]: With dead ends: 46 [2023-11-29 04:36:15,356 INFO L226 Difference]: Without dead ends: 40 [2023-11-29 04:36:15,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-29 04:36:15,357 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:36:15,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 101 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:36:15,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-29 04:36:15,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2023-11-29 04:36:15,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 04:36:15,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2023-11-29 04:36:15,365 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 38 [2023-11-29 04:36:15,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:36:15,365 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2023-11-29 04:36:15,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:36:15,366 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2023-11-29 04:36:15,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 04:36:15,367 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:36:15,367 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:36:15,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 04:36:15,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:15,572 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:36:15,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:36:15,573 INFO L85 PathProgramCache]: Analyzing trace with hash -216897549, now seen corresponding path program 1 times [2023-11-29 04:36:15,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:36:15,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384752422] [2023-11-29 04:36:15,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:15,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:36:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:15,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:36:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:15,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 04:36:15,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:15,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 04:36:15,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:15,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 04:36:15,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 04:36:15,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:36:15,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384752422] [2023-11-29 04:36:15,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384752422] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:36:15,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652829538] [2023-11-29 04:36:15,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:15,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:15,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:36:15,749 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:36:15,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 04:36:15,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:15,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 04:36:15,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:36:15,933 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 04:36:15,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:36:16,058 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 04:36:16,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652829538] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:36:16,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:36:16,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 14 [2023-11-29 04:36:16,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999082614] [2023-11-29 04:36:16,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:36:16,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 04:36:16,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:36:16,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 04:36:16,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-11-29 04:36:16,061 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:36:16,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:36:16,276 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2023-11-29 04:36:16,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 04:36:16,276 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2023-11-29 04:36:16,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:36:16,277 INFO L225 Difference]: With dead ends: 48 [2023-11-29 04:36:16,277 INFO L226 Difference]: Without dead ends: 42 [2023-11-29 04:36:16,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 81 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2023-11-29 04:36:16,278 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 50 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:36:16,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 196 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:36:16,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-29 04:36:16,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2023-11-29 04:36:16,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 04:36:16,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2023-11-29 04:36:16,285 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 41 [2023-11-29 04:36:16,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:36:16,285 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2023-11-29 04:36:16,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:36:16,286 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2023-11-29 04:36:16,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-29 04:36:16,287 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:36:16,287 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:36:16,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-29 04:36:16,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 04:36:16,492 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:36:16,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:36:16,493 INFO L85 PathProgramCache]: Analyzing trace with hash 392718574, now seen corresponding path program 1 times [2023-11-29 04:36:16,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:36:16,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65472556] [2023-11-29 04:36:16,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:16,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:36:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:18,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:36:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:18,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 04:36:18,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:18,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 04:36:18,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:18,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 04:36:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:18,329 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:36:18,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:36:18,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65472556] [2023-11-29 04:36:18,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65472556] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:36:18,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806880321] [2023-11-29 04:36:18,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:18,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:18,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:36:18,331 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:36:18,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 04:36:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:18,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-29 04:36:18,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:36:18,740 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 13 treesize of output 9 [2023-11-29 04:36:18,853 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:36:18,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 30 treesize of output 20 [2023-11-29 04:36:18,971 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 04:36:18,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:36:19,194 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 84 treesize of output 76 [2023-11-29 04:36:19,203 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:36:19,203 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 170 treesize of output 138 [2023-11-29 04:36:19,479 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 04:36:19,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806880321] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:36:19,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:36:19,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 13] total 41 [2023-11-29 04:36:19,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142749420] [2023-11-29 04:36:19,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:36:19,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 04:36:19,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:36:19,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 04:36:19,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1493, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 04:36:19,483 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 41 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 39 states have internal predecessors, (70), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-29 04:36:21,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:36:21,576 INFO L93 Difference]: Finished difference Result 86 states and 109 transitions. [2023-11-29 04:36:21,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 04:36:21,576 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 39 states have internal predecessors, (70), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 42 [2023-11-29 04:36:21,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:36:21,577 INFO L225 Difference]: With dead ends: 86 [2023-11-29 04:36:21,577 INFO L226 Difference]: Without dead ends: 84 [2023-11-29 04:36:21,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=571, Invalid=3589, Unknown=0, NotChecked=0, Total=4160 [2023-11-29 04:36:21,579 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 344 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 04:36:21,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 339 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 04:36:21,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-29 04:36:21,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 41. [2023-11-29 04:36:21,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 04:36:21,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2023-11-29 04:36:21,590 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 42 [2023-11-29 04:36:21,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:36:21,590 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2023-11-29 04:36:21,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 39 states have internal predecessors, (70), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-29 04:36:21,590 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2023-11-29 04:36:21,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 04:36:21,591 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:36:21,591 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:36:21,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 04:36:21,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 04:36:21,792 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:36:21,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:36:21,792 INFO L85 PathProgramCache]: Analyzing trace with hash -7009320, now seen corresponding path program 1 times [2023-11-29 04:36:21,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:36:21,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634436352] [2023-11-29 04:36:21,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:21,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:36:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:21,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:36:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:21,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 04:36:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:21,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 04:36:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:21,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 04:36:22,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:22,001 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 04:36:22,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:36:22,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634436352] [2023-11-29 04:36:22,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634436352] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:36:22,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102091646] [2023-11-29 04:36:22,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:22,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:22,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:36:22,003 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:36:22,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 04:36:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:22,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 108 conjunts are in the unsatisfiable core [2023-11-29 04:36:22,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:36:22,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-11-29 04:36:22,150 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 7 treesize of output 6 [2023-11-29 04:36:22,215 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-11-29 04:36:22,215 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 16 treesize of output 18 [2023-11-29 04:36:22,257 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 15 treesize of output 10 [2023-11-29 04:36:22,293 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 0 case distinctions, treesize of input 22 treesize of output 20 [2023-11-29 04:36:22,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2023-11-29 04:36:22,342 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 0 case distinctions, treesize of input 37 treesize of output 33 [2023-11-29 04:36:22,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 [2023-11-29 04:36:22,561 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 0 case distinctions, treesize of input 52 treesize of output 46 [2023-11-29 04:36:22,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 53 [2023-11-29 04:36:23,001 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 0 case distinctions, treesize of input 81 treesize of output 73 [2023-11-29 04:36:23,433 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 0 case distinctions, treesize of input 114 treesize of output 102 [2023-11-29 04:36:23,438 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 85 treesize of output 79 [2023-11-29 04:36:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 04:36:23,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:36:34,524 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_312 Int) (|v_ULTIMATE.start_upsweep_~left~0#1_31| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_20| Int)) (or (< |v_ULTIMATE.start_upsweep_~a#1.offset_20| |c_ULTIMATE.start_main_~a~0#1.offset|) (< |v_ULTIMATE.start_upsweep_~left~0#1_31| 0) (let ((.cse8 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (let ((.cse1 (store |c_#memory_int#1| |c_ULTIMATE.start_main_~a0~0#1.base| (store (select |c_#memory_int#1| |c_ULTIMATE.start_main_~a0~0#1.base|) (+ |c_ULTIMATE.start_main_~a0~0#1.offset| .cse8) v_ArrVal_312)))) (let ((.cse2 (store (let ((.cse7 (* |v_ULTIMATE.start_upsweep_~left~0#1_31| 4))) (let ((.cse6 (+ .cse7 |v_ULTIMATE.start_upsweep_~a#1.offset_20| 4)) (.cse5 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse5 .cse6 (+ (select .cse5 .cse6) (select .cse5 (+ .cse7 |v_ULTIMATE.start_upsweep_~a#1.offset_20|)))))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse8) 0)) (.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse4 (select .cse2 .cse3))) (let ((.cse0 (+ (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse4))) (= .cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse2 .cse3 .cse0) |c_ULTIMATE.start_main_~a~0#1.offset| .cse4)) |c_ULTIMATE.start_main_~a0~0#1.base|) |c_ULTIMATE.start_main_~a0~0#1.offset|))))))))) is different from false [2023-11-29 04:36:38,594 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_312 Int) (|ULTIMATE.start_main_~a~0#1.offset| Int) (|v_ULTIMATE.start_upsweep_~left~0#1_31| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_20| Int)) (or (let ((.cse8 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (let ((.cse0 (store |c_#memory_int#1| |c_ULTIMATE.start_main_~a0~0#1.base| (store (store (select |c_#memory_int#1| |c_ULTIMATE.start_main_~a0~0#1.base|) (+ |ULTIMATE.start_main_~a0~0#1.offset| .cse8) (select (select |c_#memory_int#1| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| .cse8))) (+ |ULTIMATE.start_main_~a0~0#1.offset| 4 .cse8) v_ArrVal_312)))) (let ((.cse1 (store (let ((.cse7 (* |v_ULTIMATE.start_upsweep_~left~0#1_31| 4))) (let ((.cse5 (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse6 (+ .cse7 |v_ULTIMATE.start_upsweep_~a#1.offset_20| 4))) (store .cse5 .cse6 (+ (select .cse5 (+ .cse7 |v_ULTIMATE.start_upsweep_~a#1.offset_20|)) (select .cse5 .cse6))))) (+ |ULTIMATE.start_main_~a~0#1.offset| 4 .cse8) 0)) (.cse2 (+ |ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse4 (select .cse1 .cse2))) (let ((.cse3 (+ .cse4 (select .cse1 |ULTIMATE.start_main_~a~0#1.offset|)))) (= (select (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse1 .cse2 .cse3) |ULTIMATE.start_main_~a~0#1.offset| .cse4)) |c_ULTIMATE.start_main_~a0~0#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|) .cse3)))))) (< |v_ULTIMATE.start_upsweep_~left~0#1_31| 0) (< |v_ULTIMATE.start_upsweep_~a#1.offset_20| |ULTIMATE.start_main_~a~0#1.offset|))) is different from false [2023-11-29 04:36:42,631 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_312 Int) (|ULTIMATE.start_main_~a~0#1.offset| Int) (|v_ULTIMATE.start_upsweep_~left~0#1_31| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_20| Int)) (or (< |v_ULTIMATE.start_upsweep_~left~0#1_31| 0) (let ((.cse1 (store |c_#memory_int#1| |c_ULTIMATE.start_main_#t~malloc16#1.base| (store (store (select |c_#memory_int#1| |c_ULTIMATE.start_main_#t~malloc16#1.base|) |ULTIMATE.start_main_~a0~0#1.offset| (select (select |c_#memory_int#1| |c_ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|)) (+ |ULTIMATE.start_main_~a0~0#1.offset| 4) v_ArrVal_312)))) (let ((.cse2 (let ((.cse5 (* |v_ULTIMATE.start_upsweep_~left~0#1_31| 4))) (let ((.cse4 (+ .cse5 |v_ULTIMATE.start_upsweep_~a#1.offset_20| 4)) (.cse3 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse3 .cse4 (+ (select .cse3 .cse4) (select .cse3 (+ .cse5 |v_ULTIMATE.start_upsweep_~a#1.offset_20|)))))))) (let ((.cse0 (select .cse2 |ULTIMATE.start_main_~a~0#1.offset|))) (= .cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse2 (+ |ULTIMATE.start_main_~a~0#1.offset| 4) .cse0) |ULTIMATE.start_main_~a~0#1.offset| 0)) |c_ULTIMATE.start_main_#t~malloc16#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|))))) (< |v_ULTIMATE.start_upsweep_~a#1.offset_20| |ULTIMATE.start_main_~a~0#1.offset|))) is different from false [2023-11-29 04:36:42,691 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_312 Int) (|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_319 (Array Int Int)) (|v_ULTIMATE.start_upsweep_~left~0#1_31| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_20| Int)) (or (< |v_ULTIMATE.start_upsweep_~left~0#1_31| 0) (< |v_ULTIMATE.start_upsweep_~a#1.offset_20| |ULTIMATE.start_main_~a~0#1.offset|) (let ((.cse0 (store |c_#memory_int#1| |c_ULTIMATE.start_main_#t~malloc16#1.base| (store (store v_ArrVal_319 |ULTIMATE.start_main_~a0~0#1.offset| (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_main_#t~malloc16#1.base| v_ArrVal_319) |c_ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|)) (+ |ULTIMATE.start_main_~a0~0#1.offset| 4) v_ArrVal_312)))) (let ((.cse1 (let ((.cse5 (* |v_ULTIMATE.start_upsweep_~left~0#1_31| 4))) (let ((.cse3 (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse4 (+ .cse5 |v_ULTIMATE.start_upsweep_~a#1.offset_20| 4))) (store .cse3 .cse4 (+ (select .cse3 (+ .cse5 |v_ULTIMATE.start_upsweep_~a#1.offset_20|)) (select .cse3 .cse4))))))) (let ((.cse2 (select .cse1 |ULTIMATE.start_main_~a~0#1.offset|))) (= (select (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse1 (+ |ULTIMATE.start_main_~a~0#1.offset| 4) .cse2) |ULTIMATE.start_main_~a~0#1.offset| 0)) |c_ULTIMATE.start_main_#t~malloc16#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|) .cse2)))))) is different from false [2023-11-29 04:36:42,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102091646] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:36:42,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:36:42,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 24] total 30 [2023-11-29 04:36:42,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728100566] [2023-11-29 04:36:42,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:36:42,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 04:36:42,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:36:42,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 04:36:42,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1631, Unknown=5, NotChecked=340, Total=2162 [2023-11-29 04:36:42,698 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 30 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-29 04:36:45,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:36:45,619 INFO L93 Difference]: Finished difference Result 127 states and 160 transitions. [2023-11-29 04:36:45,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 04:36:45,620 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2023-11-29 04:36:45,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:36:45,620 INFO L225 Difference]: With dead ends: 127 [2023-11-29 04:36:45,620 INFO L226 Difference]: Without dead ends: 106 [2023-11-29 04:36:45,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=687, Invalid=4726, Unknown=5, NotChecked=588, Total=6006 [2023-11-29 04:36:45,623 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 347 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 04:36:45,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 248 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 04:36:45,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-29 04:36:45,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 69. [2023-11-29 04:36:45,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 59 states have internal predecessors, (74), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 04:36:45,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 88 transitions. [2023-11-29 04:36:45,646 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 88 transitions. Word has length 45 [2023-11-29 04:36:45,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:36:45,646 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 88 transitions. [2023-11-29 04:36:45,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-29 04:36:45,646 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 88 transitions. [2023-11-29 04:36:45,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-29 04:36:45,647 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:36:45,647 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:36:45,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 04:36:45,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 04:36:45,848 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:36:45,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:36:45,848 INFO L85 PathProgramCache]: Analyzing trace with hash -55608881, now seen corresponding path program 2 times [2023-11-29 04:36:45,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:36:45,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780993855] [2023-11-29 04:36:45,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:45,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:36:45,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:46,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:36:46,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:46,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 04:36:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:46,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 04:36:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:46,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 04:36:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 04:36:46,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:36:46,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780993855] [2023-11-29 04:36:46,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780993855] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:36:46,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165529407] [2023-11-29 04:36:46,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:36:46,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:46,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:36:46,049 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:36:46,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 04:36:46,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:36:46,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:36:46,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 04:36:46,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:36:46,272 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 04:36:46,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:36:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 04:36:46,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165529407] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:36:46,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:36:46,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 18 [2023-11-29 04:36:46,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265040697] [2023-11-29 04:36:46,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:36:46,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 04:36:46,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:36:46,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 04:36:46,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-11-29 04:36:46,387 INFO L87 Difference]: Start difference. First operand 69 states and 88 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:36:46,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:36:46,750 INFO L93 Difference]: Finished difference Result 111 states and 142 transitions. [2023-11-29 04:36:46,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 04:36:46,750 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2023-11-29 04:36:46,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:36:46,751 INFO L225 Difference]: With dead ends: 111 [2023-11-29 04:36:46,751 INFO L226 Difference]: Without dead ends: 92 [2023-11-29 04:36:46,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 90 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2023-11-29 04:36:46,753 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 63 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:36:46,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 295 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:36:46,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-29 04:36:46,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 70. [2023-11-29 04:36:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 60 states have (on average 1.25) internal successors, (75), 60 states have internal predecessors, (75), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 04:36:46,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2023-11-29 04:36:46,778 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 46 [2023-11-29 04:36:46,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:36:46,778 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2023-11-29 04:36:46,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:36:46,778 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2023-11-29 04:36:46,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 04:36:46,779 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:36:46,779 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:36:46,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 04:36:46,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:46,980 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:36:46,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:36:46,980 INFO L85 PathProgramCache]: Analyzing trace with hash -438440861, now seen corresponding path program 3 times [2023-11-29 04:36:46,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:36:46,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740115716] [2023-11-29 04:36:46,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:46,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:36:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:47,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:36:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:47,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 04:36:47,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:47,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 04:36:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:47,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 04:36:47,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:47,208 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 04:36:47,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:36:47,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740115716] [2023-11-29 04:36:47,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740115716] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:36:47,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483219993] [2023-11-29 04:36:47,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:36:47,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:47,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:36:47,210 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:36:47,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 04:36:47,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 04:36:47,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:36:47,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 04:36:47,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:36:47,741 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 04:36:47,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:36:48,048 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 04:36:48,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483219993] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:36:48,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:36:48,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2023-11-29 04:36:48,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342679193] [2023-11-29 04:36:48,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:36:48,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 04:36:48,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:36:48,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 04:36:48,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2023-11-29 04:36:48,050 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand has 28 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 27 states have internal predecessors, (87), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-29 04:36:48,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:36:48,828 INFO L93 Difference]: Finished difference Result 143 states and 184 transitions. [2023-11-29 04:36:48,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 04:36:48,828 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 27 states have internal predecessors, (87), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 5 states have call successors, (10) Word has length 47 [2023-11-29 04:36:48,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:36:48,829 INFO L225 Difference]: With dead ends: 143 [2023-11-29 04:36:48,829 INFO L226 Difference]: Without dead ends: 128 [2023-11-29 04:36:48,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=285, Invalid=1695, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 04:36:48,831 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 106 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:36:48,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 544 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 04:36:48,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-29 04:36:48,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 86. [2023-11-29 04:36:48,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 76 states have (on average 1.25) internal successors, (95), 76 states have internal predecessors, (95), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 04:36:48,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 109 transitions. [2023-11-29 04:36:48,859 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 109 transitions. Word has length 47 [2023-11-29 04:36:48,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:36:48,859 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 109 transitions. [2023-11-29 04:36:48,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 27 states have internal predecessors, (87), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-29 04:36:48,860 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 109 transitions. [2023-11-29 04:36:48,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-29 04:36:48,860 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:36:48,860 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:36:48,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 04:36:49,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:49,061 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:36:49,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:36:49,061 INFO L85 PathProgramCache]: Analyzing trace with hash -701990587, now seen corresponding path program 1 times [2023-11-29 04:36:49,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:36:49,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518078446] [2023-11-29 04:36:49,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:49,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:36:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:49,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:36:49,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:49,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 04:36:49,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:49,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 04:36:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:49,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 04:36:49,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:49,272 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 04:36:49,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:36:49,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518078446] [2023-11-29 04:36:49,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518078446] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:36:49,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069869602] [2023-11-29 04:36:49,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:49,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:49,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:36:49,274 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:36:49,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 04:36:49,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:49,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 04:36:49,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:36:49,415 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 04:36:49,415 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:36:49,517 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 04:36:49,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069869602] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:36:49,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:36:49,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 10 [2023-11-29 04:36:49,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304981353] [2023-11-29 04:36:49,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:36:49,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 04:36:49,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:36:49,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 04:36:49,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 04:36:49,519 INFO L87 Difference]: Start difference. First operand 86 states and 109 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:36:49,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:36:49,676 INFO L93 Difference]: Finished difference Result 109 states and 137 transitions. [2023-11-29 04:36:49,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 04:36:49,676 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2023-11-29 04:36:49,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:36:49,677 INFO L225 Difference]: With dead ends: 109 [2023-11-29 04:36:49,677 INFO L226 Difference]: Without dead ends: 93 [2023-11-29 04:36:49,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 04:36:49,678 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:36:49,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 140 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:36:49,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-29 04:36:49,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 86. [2023-11-29 04:36:49,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 76 states have (on average 1.2236842105263157) internal successors, (93), 76 states have internal predecessors, (93), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 04:36:49,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 107 transitions. [2023-11-29 04:36:49,718 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 107 transitions. Word has length 49 [2023-11-29 04:36:49,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:36:49,718 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 107 transitions. [2023-11-29 04:36:49,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:36:49,718 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 107 transitions. [2023-11-29 04:36:49,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-29 04:36:49,719 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:36:49,719 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:36:49,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 04:36:49,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 04:36:49,920 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:36:49,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:36:49,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1190807663, now seen corresponding path program 2 times [2023-11-29 04:36:49,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:36:49,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410280365] [2023-11-29 04:36:49,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:49,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:36:49,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:50,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:36:50,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:50,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 04:36:50,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:50,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 04:36:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:50,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 04:36:50,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 04:36:50,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:36:50,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410280365] [2023-11-29 04:36:50,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410280365] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:36:50,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420703161] [2023-11-29 04:36:50,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:36:50,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:50,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:36:50,167 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:36:50,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 04:36:50,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:36:50,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:36:50,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 04:36:50,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:36:50,380 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 04:36:50,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:36:50,478 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 04:36:50,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420703161] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:36:50,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:36:50,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 16 [2023-11-29 04:36:50,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397064885] [2023-11-29 04:36:50,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:36:50,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 04:36:50,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:36:50,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 04:36:50,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:36:50,480 INFO L87 Difference]: Start difference. First operand 86 states and 107 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:36:50,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:36:50,717 INFO L93 Difference]: Finished difference Result 114 states and 140 transitions. [2023-11-29 04:36:50,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 04:36:50,718 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2023-11-29 04:36:50,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:36:50,719 INFO L225 Difference]: With dead ends: 114 [2023-11-29 04:36:50,719 INFO L226 Difference]: Without dead ends: 95 [2023-11-29 04:36:50,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-11-29 04:36:50,720 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 41 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:36:50,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 234 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:36:50,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-29 04:36:50,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2023-11-29 04:36:50,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 83 states have (on average 1.2409638554216869) internal successors, (103), 83 states have internal predecessors, (103), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 04:36:50,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 117 transitions. [2023-11-29 04:36:50,752 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 117 transitions. Word has length 49 [2023-11-29 04:36:50,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:36:50,752 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 117 transitions. [2023-11-29 04:36:50,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:36:50,752 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 117 transitions. [2023-11-29 04:36:50,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 04:36:50,753 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:36:50,753 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:36:50,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-29 04:36:50,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:50,954 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:36:50,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:36:50,954 INFO L85 PathProgramCache]: Analyzing trace with hash 692680964, now seen corresponding path program 3 times [2023-11-29 04:36:50,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:36:50,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241008311] [2023-11-29 04:36:50,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:36:50,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:36:50,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:51,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:36:51,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:51,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 04:36:51,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:51,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 04:36:51,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:51,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 04:36:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:36:51,134 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 04:36:51,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:36:51,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241008311] [2023-11-29 04:36:51,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241008311] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:36:51,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425498787] [2023-11-29 04:36:51,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:36:51,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:36:51,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:36:51,136 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:36:51,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 04:36:51,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 04:36:51,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:36:51,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 129 conjunts are in the unsatisfiable core [2023-11-29 04:36:51,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:36:51,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-11-29 04:36:51,460 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 7 treesize of output 6 [2023-11-29 04:36:51,544 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-11-29 04:36:51,544 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 16 treesize of output 18 [2023-11-29 04:36:51,606 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 15 treesize of output 10 [2023-11-29 04:36:51,665 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 0 case distinctions, treesize of input 22 treesize of output 20 [2023-11-29 04:36:51,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2023-11-29 04:36:51,725 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 0 case distinctions, treesize of input 33 treesize of output 29 [2023-11-29 04:36:51,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 15 [2023-11-29 04:36:51,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2023-11-29 04:36:52,118 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 0 case distinctions, treesize of input 63 treesize of output 57 [2023-11-29 04:36:54,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 88 [2023-11-29 04:36:54,392 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 0 case distinctions, treesize of input 130 treesize of output 122 [2023-11-29 04:36:55,116 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 0 case distinctions, treesize of input 346 treesize of output 334 [2023-11-29 04:36:55,122 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 629 treesize of output 623 [2023-11-29 04:36:55,177 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:36:55,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:38:10,415 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_522 Int) (|v_ULTIMATE.start_upsweep_~left~0#1_56| Int) (v_ArrVal_530 (Array Int Int))) (or (< |v_ULTIMATE.start_upsweep_~left~0#1_56| 0) (let ((.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse1 (store |c_#memory_int#1| |c_ULTIMATE.start_main_#t~malloc16#1.base| (store (store v_ArrVal_530 |c_ULTIMATE.start_main_#t~malloc16#1.offset| (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_main_#t~malloc16#1.base| v_ArrVal_530) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)) (+ |c_ULTIMATE.start_main_#t~malloc16#1.offset| 4) v_ArrVal_522)))) (let ((.cse2 (let ((.cse7 (* |v_ULTIMATE.start_upsweep_~left~0#1_56| 4))) (let ((.cse5 (+ .cse7 |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse4 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse4 .cse5 (let ((.cse6 (store .cse4 .cse3 (+ (select .cse4 .cse3) (select .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (+ (select .cse6 .cse5) (select .cse6 (+ .cse7 |c_ULTIMATE.start_main_~a~0#1.offset|))))))))) (let ((.cse0 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|))) (= .cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse2 .cse3 .cse0) |c_ULTIMATE.start_main_~a~0#1.offset| 0)) |c_ULTIMATE.start_main_#t~malloc16#1.base|) |c_ULTIMATE.start_main_#t~malloc16#1.offset|))))))) is different from false [2023-11-29 04:38:10,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425498787] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:38:10,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:38:10,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 27] total 34 [2023-11-29 04:38:10,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746712100] [2023-11-29 04:38:10,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:38:10,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 04:38:10,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:38:10,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 04:38:10,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=2435, Unknown=20, NotChecked=102, Total=2862 [2023-11-29 04:38:10,421 INFO L87 Difference]: Start difference. First operand 93 states and 117 transitions. Second operand has 34 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 04:38:12,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:38:12,175 INFO L93 Difference]: Finished difference Result 95 states and 118 transitions. [2023-11-29 04:38:12,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 04:38:12,175 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 50 [2023-11-29 04:38:12,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:38:12,176 INFO L225 Difference]: With dead ends: 95 [2023-11-29 04:38:12,176 INFO L226 Difference]: Without dead ends: 70 [2023-11-29 04:38:12,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 78.5s TimeCoverageRelationStatistics Valid=510, Invalid=3634, Unknown=20, NotChecked=126, Total=4290 [2023-11-29 04:38:12,179 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 136 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 04:38:12,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 165 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 04:38:12,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-29 04:38:12,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-11-29 04:38:12,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 60 states have internal predecessors, (73), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 04:38:12,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2023-11-29 04:38:12,208 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 50 [2023-11-29 04:38:12,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:38:12,208 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2023-11-29 04:38:12,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 04:38:12,208 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2023-11-29 04:38:12,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-29 04:38:12,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:38:12,209 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:38:12,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 04:38:12,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 04:38:12,410 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:38:12,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:38:12,410 INFO L85 PathProgramCache]: Analyzing trace with hash 949203151, now seen corresponding path program 4 times [2023-11-29 04:38:12,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:38:12,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825528821] [2023-11-29 04:38:12,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:38:12,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:38:12,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:38:12,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:38:12,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:38:12,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 04:38:12,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:38:12,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 04:38:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:38:12,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 04:38:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:38:12,636 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-29 04:38:12,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:38:12,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825528821] [2023-11-29 04:38:12,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825528821] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:38:12,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826301328] [2023-11-29 04:38:12,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:38:12,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:38:12,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:38:12,638 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:38:12,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 04:38:12,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:38:12,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:38:12,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 04:38:12,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:38:12,888 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-29 04:38:12,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:38:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-29 04:38:13,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826301328] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:38:13,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:38:13,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 10 [2023-11-29 04:38:13,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968088410] [2023-11-29 04:38:13,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:38:13,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 04:38:13,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:38:13,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 04:38:13,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 04:38:13,034 INFO L87 Difference]: Start difference. First operand 70 states and 87 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:38:13,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:38:13,229 INFO L93 Difference]: Finished difference Result 92 states and 114 transitions. [2023-11-29 04:38:13,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 04:38:13,230 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2023-11-29 04:38:13,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:38:13,231 INFO L225 Difference]: With dead ends: 92 [2023-11-29 04:38:13,231 INFO L226 Difference]: Without dead ends: 84 [2023-11-29 04:38:13,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 105 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 04:38:13,232 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:38:13,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 151 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:38:13,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-29 04:38:13,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 72. [2023-11-29 04:38:13,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 62 states have internal predecessors, (76), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 04:38:13,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2023-11-29 04:38:13,269 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 52 [2023-11-29 04:38:13,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:38:13,269 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2023-11-29 04:38:13,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:38:13,270 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2023-11-29 04:38:13,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 04:38:13,270 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:38:13,270 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:38:13,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 04:38:13,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 04:38:13,471 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:38:13,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:38:13,471 INFO L85 PathProgramCache]: Analyzing trace with hash 140078603, now seen corresponding path program 5 times [2023-11-29 04:38:13,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:38:13,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995774625] [2023-11-29 04:38:13,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:38:13,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:38:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:38:13,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:38:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:38:13,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 04:38:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:38:13,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 04:38:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:38:13,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 04:38:13,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:38:13,698 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-29 04:38:13,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:38:13,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995774625] [2023-11-29 04:38:13,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995774625] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:38:13,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371257868] [2023-11-29 04:38:13,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:38:13,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:38:13,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:38:13,701 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:38:13,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 04:38:14,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 04:38:14,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:38:14,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 125 conjunts are in the unsatisfiable core [2023-11-29 04:38:14,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:38:14,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-11-29 04:38:14,106 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 7 treesize of output 6 [2023-11-29 04:38:14,192 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-11-29 04:38:14,193 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 16 treesize of output 18 [2023-11-29 04:38:14,243 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 15 treesize of output 10 [2023-11-29 04:38:14,293 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 0 case distinctions, treesize of input 22 treesize of output 20 [2023-11-29 04:38:14,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2023-11-29 04:38:14,353 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 0 case distinctions, treesize of input 33 treesize of output 29 [2023-11-29 04:38:14,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 21 treesize of output 14 [2023-11-29 04:38:14,421 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 0 case distinctions, treesize of input 36 treesize of output 34 [2023-11-29 04:38:14,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:38:14,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 25 treesize of output 14 [2023-11-29 04:38:14,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2023-11-29 04:38:14,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2023-11-29 04:38:15,126 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 0 case distinctions, treesize of input 38 treesize of output 32 [2023-11-29 04:38:15,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2023-11-29 04:38:15,501 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 0 case distinctions, treesize of input 72 treesize of output 64 [2023-11-29 04:38:16,499 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 0 case distinctions, treesize of input 129 treesize of output 117 [2023-11-29 04:38:16,505 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 195 treesize of output 189 [2023-11-29 04:38:16,569 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:38:16,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:39:43,904 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~1#1_69| Int) (v_z_16 Int) (v_y_16 Int) (|v_ULTIMATE.start_downsweep_~n#1_37| Int) (v_ArrVal_635 Int) (v_ArrVal_643 (Array Int Int)) (v_ArrVal_633 Int)) (let ((.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse2 (store |c_#memory_int#1| |c_ULTIMATE.start_main_#t~malloc16#1.base| (store (store (store v_ArrVal_643 |c_ULTIMATE.start_main_#t~malloc16#1.offset| (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_main_#t~malloc16#1.base| v_ArrVal_643) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)) (+ |c_ULTIMATE.start_main_#t~malloc16#1.offset| 4) v_ArrVal_633) (+ (* |v_ULTIMATE.start_main_~i~1#1_69| 4) |c_ULTIMATE.start_main_#t~malloc16#1.offset|) v_ArrVal_635)))) (let ((.cse0 (let ((.cse3 (store (let ((.cse7 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse8 (select .cse7 .cse1)) (.cse10 (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse9 (select .cse7 |c_ULTIMATE.start_main_~a~0#1.offset|))) (store (store .cse7 .cse1 (+ .cse8 .cse9)) .cse10 (+ .cse8 (select .cse7 .cse10) .cse9 (select .cse7 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)))))) (+ (* |v_ULTIMATE.start_downsweep_~n#1_37| 4) (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (.cse4 (+ (* v_y_16 16) (- 4) |c_ULTIMATE.start_main_~a~0#1.offset| (* v_z_16 8)))) (let ((.cse5 (+ (* v_y_16 8) (- 4) (* v_z_16 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse6 (select .cse3 .cse4))) (store (store .cse3 .cse4 (+ (select .cse3 .cse5) .cse6)) .cse5 .cse6))))) (or (< |v_ULTIMATE.start_main_~i~1#1_69| 2) (< (+ v_z_16 (* v_y_16 2)) 1) (not (= (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (< 0 v_y_16) (< 1 v_z_16) (= (select .cse0 .cse1) (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| .cse0) |c_ULTIMATE.start_main_#t~malloc16#1.base|) |c_ULTIMATE.start_main_#t~malloc16#1.offset|)) (< |v_ULTIMATE.start_downsweep_~n#1_37| (+ |v_ULTIMATE.start_main_~i~1#1_69| 1)))))) is different from false [2023-11-29 04:39:43,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371257868] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:39:43,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:39:43,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 28] total 34 [2023-11-29 04:39:43,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597692784] [2023-11-29 04:39:43,920 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:39:43,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 04:39:43,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:39:43,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 04:39:43,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=2893, Unknown=15, NotChecked=110, Total=3306 [2023-11-29 04:39:43,923 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 34 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 31 states have internal predecessors, (73), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-29 04:39:51,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:39:51,279 INFO L93 Difference]: Finished difference Result 158 states and 201 transitions. [2023-11-29 04:39:51,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 04:39:51,280 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 31 states have internal predecessors, (73), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 55 [2023-11-29 04:39:51,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:39:51,281 INFO L225 Difference]: With dead ends: 158 [2023-11-29 04:39:51,281 INFO L226 Difference]: Without dead ends: 130 [2023-11-29 04:39:51,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1774 ImplicationChecksByTransitivity, 92.6s TimeCoverageRelationStatistics Valid=1402, Invalid=8093, Unknown=15, NotChecked=192, Total=9702 [2023-11-29 04:39:51,285 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 450 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:39:51,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 264 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 04:39:51,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-11-29 04:39:51,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 94. [2023-11-29 04:39:51,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 84 states have (on average 1.25) internal successors, (105), 84 states have internal predecessors, (105), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 04:39:51,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2023-11-29 04:39:51,330 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 55 [2023-11-29 04:39:51,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:39:51,330 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2023-11-29 04:39:51,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 31 states have internal predecessors, (73), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-29 04:39:51,330 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2023-11-29 04:39:51,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-29 04:39:51,331 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:39:51,331 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:39:51,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 04:39:51,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:39:51,532 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:39:51,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:39:51,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1544317000, now seen corresponding path program 6 times [2023-11-29 04:39:51,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:39:51,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310414141] [2023-11-29 04:39:51,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:39:51,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:39:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:51,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:39:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:51,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 04:39:51,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:51,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 04:39:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:51,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 04:39:51,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:51,825 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-29 04:39:51,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:39:51,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310414141] [2023-11-29 04:39:51,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310414141] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:39:51,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959911589] [2023-11-29 04:39:51,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:39:51,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:39:51,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:39:51,827 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:39:51,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 04:39:52,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 04:39:52,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:39:52,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 04:39:52,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:39:52,257 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 04:39:52,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:39:52,608 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 04:39:52,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959911589] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:39:52,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:39:52,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 28 [2023-11-29 04:39:52,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469504034] [2023-11-29 04:39:52,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:39:52,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 04:39:52,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:39:52,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 04:39:52,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2023-11-29 04:39:52,611 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:39:53,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:39:53,639 INFO L93 Difference]: Finished difference Result 167 states and 214 transitions. [2023-11-29 04:39:53,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 04:39:53,639 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 59 [2023-11-29 04:39:53,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:39:53,640 INFO L225 Difference]: With dead ends: 167 [2023-11-29 04:39:53,641 INFO L226 Difference]: Without dead ends: 149 [2023-11-29 04:39:53,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 105 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2023-11-29 04:39:53,642 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 167 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 04:39:53,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 246 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 04:39:53,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-11-29 04:39:53,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 126. [2023-11-29 04:39:53,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 116 states have (on average 1.2758620689655173) internal successors, (148), 116 states have internal predecessors, (148), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 04:39:53,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 162 transitions. [2023-11-29 04:39:53,722 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 162 transitions. Word has length 59 [2023-11-29 04:39:53,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:39:53,722 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 162 transitions. [2023-11-29 04:39:53,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:39:53,723 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 162 transitions. [2023-11-29 04:39:53,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-29 04:39:53,723 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:39:53,724 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:39:53,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 04:39:53,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:39:53,924 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:39:53,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:39:53,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1437909462, now seen corresponding path program 7 times [2023-11-29 04:39:53,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:39:53,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421985913] [2023-11-29 04:39:53,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:39:53,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:39:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:54,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:39:54,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:54,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 04:39:54,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:54,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 04:39:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:54,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 04:39:54,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:54,517 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-29 04:39:54,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:39:54,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421985913] [2023-11-29 04:39:54,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421985913] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:39:54,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394352258] [2023-11-29 04:39:54,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:39:54,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:39:54,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:39:54,518 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:39:54,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 04:39:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:39:54,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 140 conjunts are in the unsatisfiable core [2023-11-29 04:39:54,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:39:54,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-11-29 04:39:54,766 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 7 treesize of output 6 [2023-11-29 04:39:54,864 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-11-29 04:39:54,864 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 16 treesize of output 18 [2023-11-29 04:39:54,935 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 15 treesize of output 10 [2023-11-29 04:39:55,000 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 15 treesize of output 10 [2023-11-29 04:39:55,051 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 0 case distinctions, treesize of input 24 treesize of output 22 [2023-11-29 04:39:55,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 13 [2023-11-29 04:39:55,135 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 0 case distinctions, treesize of input 39 treesize of output 35 [2023-11-29 04:39:55,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:55,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 17 [2023-11-29 04:39:55,219 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 0 case distinctions, treesize of input 39 treesize of output 35 [2023-11-29 04:39:55,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:39:55,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 27 treesize of output 16 [2023-11-29 04:39:55,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2023-11-29 04:39:55,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2023-11-29 04:39:55,936 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 0 case distinctions, treesize of input 46 treesize of output 40 [2023-11-29 04:39:56,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 50 [2023-11-29 04:39:56,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 74 [2023-11-29 04:39:56,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 70 [2023-11-29 04:39:56,854 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 0 case distinctions, treesize of input 180 treesize of output 172 [2023-11-29 04:39:57,840 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 0 case distinctions, treesize of input 279 treesize of output 263 [2023-11-29 04:39:57,845 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 213 treesize of output 207 [2023-11-29 04:39:57,903 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 46 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:39:57,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:40:50,643 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_downsweep_~n#1_41| Int) (v_y_22 Int)) (let ((.cse13 (* v_y_22 2))) (or (< v_y_22 1) (let ((.cse0 (let ((.cse1 (let ((.cse5 (let ((.cse9 (store (select |c_#memory_int#1| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_downsweep_~n#1_41| 4) (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (.cse10 (+ (- 4) (* |c_ULTIMATE.start_upsweep_~space~0#1| 8) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse11 (+ (- 4) |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_upsweep_~space~0#1| 4))) (.cse12 (select .cse9 .cse10))) (store (store .cse9 .cse10 (+ (select .cse9 .cse11) .cse12)) .cse11 .cse12)))) (.cse6 (+ (* v_y_22 8) (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse8 (+ (* v_y_22 4) (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse7 (select .cse5 .cse6))) (store (store .cse5 .cse6 (+ .cse7 (select .cse5 .cse8))) .cse8 .cse7)))) (.cse2 (+ (* v_y_22 16) (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse3 (+ (- 4) (* v_y_22 12) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse4 (select .cse1 .cse2))) (store (store .cse1 .cse2 (+ (select .cse1 .cse3) .cse4)) .cse3 .cse4))))) (= (select .cse0 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (+ (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_main_~a~0#1.base| .cse0) |c_ULTIMATE.start_main_~a0~0#1.base|) (+ |c_ULTIMATE.start_main_~a0~0#1.offset| 4)) (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (< (+ .cse13 1) |c_ULTIMATE.start_upsweep_~space~0#1|) (< |c_ULTIMATE.start_upsweep_~space~0#1| .cse13) (< |v_ULTIMATE.start_downsweep_~n#1_41| |c_ULTIMATE.start_main_~n~0#1|)))) is different from false [2023-11-29 04:42:41,985 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_downsweep_~n#1_41| Int) (|ULTIMATE.start_main_~a~0#1.offset| Int) (|v_ULTIMATE.start_main_~i~1#1_85| Int) (|v_ULTIMATE.start_main_~i~1#1_84| Int) (v_ArrVal_768 Int) (v_ArrVal_766 Int)) (or (< |v_ULTIMATE.start_main_~i~1#1_85| (+ |c_ULTIMATE.start_main_~i~1#1| 1)) (< |v_ULTIMATE.start_main_~i~1#1_84| (+ |v_ULTIMATE.start_main_~i~1#1_85| 1)) (< |v_ULTIMATE.start_downsweep_~n#1_41| (+ |v_ULTIMATE.start_main_~i~1#1_84| 1)) (let ((.cse0 (store |c_#memory_int#1| |c_ULTIMATE.start_main_~a0~0#1.base| (store (store (let ((.cse12 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (store (select |c_#memory_int#1| |c_ULTIMATE.start_main_~a0~0#1.base|) (+ |c_ULTIMATE.start_main_~a0~0#1.offset| .cse12) (select (select |c_#memory_int#1| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| .cse12)))) (+ (* |v_ULTIMATE.start_main_~i~1#1_85| 4) |c_ULTIMATE.start_main_~a0~0#1.offset|) v_ArrVal_766) (+ |c_ULTIMATE.start_main_~a0~0#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_84| 4)) v_ArrVal_768)))) (let ((.cse6 (+ |ULTIMATE.start_main_~a~0#1.offset| 12)) (.cse8 (+ |ULTIMATE.start_main_~a~0#1.offset| 8)) (.cse1 (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse3 (+ |ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse2 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_downsweep_~n#1_41| 4) (- 4)))) (let ((.cse7 (store (let ((.cse10 (select .cse1 .cse3)) (.cse11 (select .cse1 |ULTIMATE.start_main_~a~0#1.offset|))) (store (store .cse1 .cse3 (+ .cse10 .cse11)) .cse6 (+ .cse10 (select .cse1 .cse6) (select .cse1 .cse8) .cse11))) .cse2 0))) (let ((.cse9 (select .cse7 .cse3))) (= (let ((.cse5 (select .cse7 |ULTIMATE.start_main_~a~0#1.offset|))) (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse4 (select .cse7 .cse6))) (store (store (store (store (store .cse1 .cse2 0) .cse3 (+ .cse4 .cse5)) |ULTIMATE.start_main_~a~0#1.offset| .cse4) .cse6 (+ .cse4 (select .cse7 .cse8) .cse9)) .cse8 (+ .cse4 .cse9)))) |c_ULTIMATE.start_main_~a0~0#1.base|) (+ |c_ULTIMATE.start_main_~a0~0#1.offset| 4)) .cse5)) .cse9))))))) is different from false [2023-11-29 04:42:42,188 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_downsweep_~n#1_41| Int) (|ULTIMATE.start_main_~a~0#1.offset| Int) (|v_ULTIMATE.start_main_~i~1#1_85| Int) (|v_ULTIMATE.start_main_~i~1#1_84| Int) (v_ArrVal_768 Int) (v_ArrVal_766 Int) (v_ArrVal_763 (Array Int Int))) (or (< |v_ULTIMATE.start_main_~i~1#1_84| (+ |v_ULTIMATE.start_main_~i~1#1_85| 1)) (let ((.cse1 (store |c_#memory_int#1| |c_ULTIMATE.start_main_~a0~0#1.base| (store (store (let ((.cse12 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (store v_ArrVal_763 (+ |c_ULTIMATE.start_main_~a0~0#1.offset| 4 .cse12) (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_main_~a0~0#1.base| v_ArrVal_763) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| 4 .cse12)))) (+ (* |v_ULTIMATE.start_main_~i~1#1_85| 4) |c_ULTIMATE.start_main_~a0~0#1.offset|) v_ArrVal_766) (+ |c_ULTIMATE.start_main_~a0~0#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_84| 4)) v_ArrVal_768)))) (let ((.cse9 (+ |ULTIMATE.start_main_~a~0#1.offset| 8)) (.cse7 (+ |ULTIMATE.start_main_~a~0#1.offset| 12)) (.cse4 (+ |ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse2 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse3 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_downsweep_~n#1_41| 4) (- 4)))) (let ((.cse8 (store (let ((.cse10 (select .cse2 |ULTIMATE.start_main_~a~0#1.offset|)) (.cse11 (select .cse2 .cse4))) (store (store .cse2 .cse4 (+ .cse10 .cse11)) .cse7 (+ .cse10 .cse11 (select .cse2 .cse9) (select .cse2 .cse7)))) .cse3 0))) (let ((.cse0 (select .cse8 .cse4))) (= .cse0 (let ((.cse6 (select .cse8 |ULTIMATE.start_main_~a~0#1.offset|))) (+ (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse5 (select .cse8 .cse7))) (store (store (store (store (store .cse2 .cse3 0) .cse4 (+ .cse5 .cse6)) |ULTIMATE.start_main_~a~0#1.offset| .cse5) .cse7 (+ .cse0 .cse5 (select .cse8 .cse9))) .cse9 (+ .cse0 .cse5)))) |c_ULTIMATE.start_main_~a0~0#1.base|) (+ |c_ULTIMATE.start_main_~a0~0#1.offset| 4)) .cse6))))))) (< |v_ULTIMATE.start_downsweep_~n#1_41| (+ |v_ULTIMATE.start_main_~i~1#1_84| 1)) (< |v_ULTIMATE.start_main_~i~1#1_85| (+ |c_ULTIMATE.start_main_~i~1#1| 2)))) is different from false [2023-11-29 04:42:42,329 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_downsweep_~n#1_41| Int) (|ULTIMATE.start_main_~a~0#1.offset| Int) (|v_ULTIMATE.start_main_~i~1#1_85| Int) (|v_ULTIMATE.start_main_~i~1#1_84| Int) (v_ArrVal_768 Int) (v_ArrVal_766 Int) (v_ArrVal_763 (Array Int Int))) (or (let ((.cse10 (+ |c_ULTIMATE.start_main_#t~malloc16#1.offset| 4)) (.cse4 (+ |ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse1 (store |c_#memory_int#1| |c_ULTIMATE.start_main_#t~malloc16#1.base| (store (store (store v_ArrVal_763 .cse10 (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_main_#t~malloc16#1.base| v_ArrVal_763) |c_ULTIMATE.start_main_~a~0#1.base|) .cse4)) (+ (* |v_ULTIMATE.start_main_~i~1#1_85| 4) |c_ULTIMATE.start_main_#t~malloc16#1.offset|) v_ArrVal_766) (+ |c_ULTIMATE.start_main_#t~malloc16#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_84| 4)) v_ArrVal_768)))) (let ((.cse8 (+ |ULTIMATE.start_main_~a~0#1.offset| 8)) (.cse6 (+ |ULTIMATE.start_main_~a~0#1.offset| 12)) (.cse2 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse3 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_downsweep_~n#1_41| 4) (- 4)))) (let ((.cse7 (store (let ((.cse11 (select .cse2 |ULTIMATE.start_main_~a~0#1.offset|)) (.cse12 (select .cse2 .cse4))) (store (store .cse2 .cse4 (+ .cse11 .cse12)) .cse6 (+ .cse11 (select .cse2 .cse8) .cse12 (select .cse2 .cse6)))) .cse3 0))) (let ((.cse9 (select .cse7 .cse4))) (= (let ((.cse0 (select .cse7 |ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse5 (select .cse7 .cse6))) (store (store (store (store (store .cse2 .cse3 0) .cse4 (+ .cse0 .cse5)) |ULTIMATE.start_main_~a~0#1.offset| .cse5) .cse6 (+ .cse5 (select .cse7 .cse8) .cse9)) .cse8 (+ .cse5 .cse9)))) |c_ULTIMATE.start_main_#t~malloc16#1.base|) .cse10))) .cse9)))))) (< |v_ULTIMATE.start_main_~i~1#1_84| (+ |v_ULTIMATE.start_main_~i~1#1_85| 1)) (< |v_ULTIMATE.start_main_~i~1#1_85| 2) (< |v_ULTIMATE.start_downsweep_~n#1_41| (+ |v_ULTIMATE.start_main_~i~1#1_84| 1)))) is different from false [2023-11-29 04:42:42,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394352258] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:42:42,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:42:42,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 33] total 42 [2023-11-29 04:42:42,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61333440] [2023-11-29 04:42:42,446 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:42:42,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 04:42:42,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:42:42,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 04:42:42,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=3846, Unknown=32, NotChecked=516, Total=4692 [2023-11-29 04:42:42,450 INFO L87 Difference]: Start difference. First operand 126 states and 162 transitions. Second operand has 42 states, 39 states have (on average 2.051282051282051) internal successors, (80), 39 states have internal predecessors, (80), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-29 04:43:02,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:43:02,836 INFO L93 Difference]: Finished difference Result 288 states and 366 transitions. [2023-11-29 04:43:02,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-11-29 04:43:02,837 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 39 states have (on average 2.051282051282051) internal successors, (80), 39 states have internal predecessors, (80), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 61 [2023-11-29 04:43:02,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:43:02,839 INFO L225 Difference]: With dead ends: 288 [2023-11-29 04:43:02,839 INFO L226 Difference]: Without dead ends: 240 [2023-11-29 04:43:02,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 2997 ImplicationChecksByTransitivity, 182.1s TimeCoverageRelationStatistics Valid=1944, Invalid=13540, Unknown=32, NotChecked=996, Total=16512 [2023-11-29 04:43:02,846 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 318 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 2287 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 2350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:43:02,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 606 Invalid, 2350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2287 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-29 04:43:02,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-11-29 04:43:02,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 146. [2023-11-29 04:43:02,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 133 states have (on average 1.2706766917293233) internal successors, (169), 133 states have internal predecessors, (169), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 04:43:02,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 189 transitions. [2023-11-29 04:43:02,960 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 189 transitions. Word has length 61 [2023-11-29 04:43:02,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:43:02,961 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 189 transitions. [2023-11-29 04:43:02,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 39 states have (on average 2.051282051282051) internal successors, (80), 39 states have internal predecessors, (80), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-29 04:43:02,961 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 189 transitions. [2023-11-29 04:43:02,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-29 04:43:02,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:43:02,962 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:43:02,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-29 04:43:03,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 04:43:03,163 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:43:03,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:43:03,163 INFO L85 PathProgramCache]: Analyzing trace with hash -334411062, now seen corresponding path program 4 times [2023-11-29 04:43:03,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:43:03,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047056150] [2023-11-29 04:43:03,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:43:03,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:43:03,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:43:03,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:43:03,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:43:03,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 04:43:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:43:03,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-29 04:43:03,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:43:03,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 04:43:03,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:43:03,516 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 22 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 04:43:03,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:43:03,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047056150] [2023-11-29 04:43:03,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047056150] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:43:03,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90413252] [2023-11-29 04:43:03,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:43:03,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:43:03,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:43:03,518 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:43:03,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 04:43:03,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:43:03,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:43:03,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 04:43:03,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:43:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-29 04:43:03,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:43:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 30 proven. 16 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-29 04:43:04,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90413252] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:43:04,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:43:04,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2023-11-29 04:43:04,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556444824] [2023-11-29 04:43:04,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:43:04,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 04:43:04,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:43:04,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 04:43:04,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2023-11-29 04:43:04,184 INFO L87 Difference]: Start difference. First operand 146 states and 189 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:43:05,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:43:05,759 INFO L93 Difference]: Finished difference Result 273 states and 354 transitions. [2023-11-29 04:43:05,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-29 04:43:05,760 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 62 [2023-11-29 04:43:05,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:43:05,761 INFO L225 Difference]: With dead ends: 273 [2023-11-29 04:43:05,762 INFO L226 Difference]: Without dead ends: 193 [2023-11-29 04:43:05,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=689, Invalid=2971, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 04:43:05,763 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 199 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:43:05,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 343 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 04:43:05,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-11-29 04:43:05,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2023-11-29 04:43:05,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 136 states have (on average 1.2573529411764706) internal successors, (171), 136 states have internal predecessors, (171), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 04:43:05,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 191 transitions. [2023-11-29 04:43:05,900 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 191 transitions. Word has length 62 [2023-11-29 04:43:05,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:43:05,900 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 191 transitions. [2023-11-29 04:43:05,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:43:05,901 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 191 transitions. [2023-11-29 04:43:05,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-29 04:43:05,902 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:43:05,902 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:43:05,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 04:43:06,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:43:06,103 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:43:06,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:43:06,103 INFO L85 PathProgramCache]: Analyzing trace with hash 112563151, now seen corresponding path program 8 times [2023-11-29 04:43:06,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:43:06,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217602781] [2023-11-29 04:43:06,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:43:06,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:43:06,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:43:06,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:43:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:43:06,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 04:43:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:43:06,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 04:43:06,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:43:06,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 04:43:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:43:06,449 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 04:43:06,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:43:06,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217602781] [2023-11-29 04:43:06,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217602781] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:43:06,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931586259] [2023-11-29 04:43:06,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:43:06,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:43:06,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:43:06,451 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:43:06,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 04:43:06,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:43:06,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:43:06,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 04:43:06,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:43:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-29 04:43:06,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:43:06,957 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-29 04:43:06,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931586259] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:43:06,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:43:06,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 23 [2023-11-29 04:43:06,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727824895] [2023-11-29 04:43:06,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:43:06,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 04:43:06,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:43:06,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 04:43:06,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2023-11-29 04:43:06,959 INFO L87 Difference]: Start difference. First operand 149 states and 191 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:43:07,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:43:07,713 INFO L93 Difference]: Finished difference Result 262 states and 337 transitions. [2023-11-29 04:43:07,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 04:43:07,714 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 62 [2023-11-29 04:43:07,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:43:07,715 INFO L225 Difference]: With dead ends: 262 [2023-11-29 04:43:07,715 INFO L226 Difference]: Without dead ends: 184 [2023-11-29 04:43:07,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 118 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=687, Unknown=0, NotChecked=0, Total=870 [2023-11-29 04:43:07,716 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 80 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:43:07,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 382 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 04:43:07,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-11-29 04:43:07,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 151. [2023-11-29 04:43:07,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 138 states have (on average 1.2536231884057971) internal successors, (173), 138 states have internal predecessors, (173), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 04:43:07,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 193 transitions. [2023-11-29 04:43:07,836 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 193 transitions. Word has length 62 [2023-11-29 04:43:07,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:43:07,836 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 193 transitions. [2023-11-29 04:43:07,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:43:07,836 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 193 transitions. [2023-11-29 04:43:07,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-29 04:43:07,837 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:43:07,837 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:43:07,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-29 04:43:08,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 04:43:08,038 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:43:08,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:43:08,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1444811871, now seen corresponding path program 9 times [2023-11-29 04:43:08,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:43:08,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753837675] [2023-11-29 04:43:08,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:43:08,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:43:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:43:08,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:43:08,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:43:08,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 04:43:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:43:08,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 04:43:08,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:43:08,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 04:43:08,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:43:08,323 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-29 04:43:08,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:43:08,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753837675] [2023-11-29 04:43:08,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753837675] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:43:08,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081623719] [2023-11-29 04:43:08,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:43:08,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:43:08,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:43:08,325 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:43:08,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 04:43:09,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 04:43:09,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:43:09,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-29 04:43:09,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:43:09,878 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-29 04:43:09,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:43:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 12 proven. 34 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-29 04:43:10,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081623719] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:43:10,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:43:10,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 21, 24] total 47 [2023-11-29 04:43:10,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302087966] [2023-11-29 04:43:10,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:43:10,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-29 04:43:10,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:43:10,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-29 04:43:10,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1847, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 04:43:10,886 INFO L87 Difference]: Start difference. First operand 151 states and 193 transitions. Second operand has 47 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 46 states have internal predecessors, (102), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:43:13,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:43:13,066 INFO L93 Difference]: Finished difference Result 234 states and 300 transitions. [2023-11-29 04:43:13,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 04:43:13,067 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 46 states have internal predecessors, (102), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 63 [2023-11-29 04:43:13,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:43:13,068 INFO L225 Difference]: With dead ends: 234 [2023-11-29 04:43:13,068 INFO L226 Difference]: Without dead ends: 219 [2023-11-29 04:43:13,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 94 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1587 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1015, Invalid=4535, Unknown=0, NotChecked=0, Total=5550 [2023-11-29 04:43:13,069 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 147 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 04:43:13,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 429 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1243 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 04:43:13,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-11-29 04:43:13,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 162. [2023-11-29 04:43:13,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 149 states have (on average 1.25503355704698) internal successors, (187), 149 states have internal predecessors, (187), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 04:43:13,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 207 transitions. [2023-11-29 04:43:13,210 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 207 transitions. Word has length 63 [2023-11-29 04:43:13,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:43:13,210 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 207 transitions. [2023-11-29 04:43:13,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 46 states have internal predecessors, (102), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:43:13,211 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 207 transitions. [2023-11-29 04:43:13,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-29 04:43:13,212 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:43:13,212 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:43:13,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 04:43:13,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 04:43:13,413 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:43:13,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:43:13,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1036333779, now seen corresponding path program 10 times [2023-11-29 04:43:13,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:43:13,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90525322] [2023-11-29 04:43:13,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:43:13,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:43:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:43:32,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:43:32,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:43:32,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 04:43:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:43:32,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 04:43:32,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:43:32,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 04:43:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:43:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:43:32,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:43:32,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90525322] [2023-11-29 04:43:32,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90525322] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:43:32,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509952108] [2023-11-29 04:43:32,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:43:32,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:43:32,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:43:32,447 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:43:32,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 04:43:32,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:43:32,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:43:32,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 161 conjunts are in the unsatisfiable core [2023-11-29 04:43:32,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:43:32,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-11-29 04:43:32,970 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 7 treesize of output 6 [2023-11-29 04:43:33,174 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 04:43:33,175 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 11 treesize of output 11 [2023-11-29 04:43:33,325 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 15 treesize of output 10 [2023-11-29 04:43:33,492 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 15 treesize of output 10 [2023-11-29 04:43:33,649 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 15 treesize of output 10 [2023-11-29 04:43:33,812 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 0 case distinctions, treesize of input 22 treesize of output 20 [2023-11-29 04:43:33,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 [2023-11-29 04:43:33,980 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 0 case distinctions, treesize of input 32 treesize of output 30 [2023-11-29 04:43:33,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 21 treesize of output 14 [2023-11-29 04:43:34,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2023-11-29 04:43:34,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2023-11-29 04:43:35,476 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 0 case distinctions, treesize of input 38 treesize of output 32 [2023-11-29 04:43:35,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2023-11-29 04:43:36,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 64 [2023-11-29 04:43:37,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 132 [2023-11-29 04:43:37,206 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 0 case distinctions, treesize of input 225 treesize of output 217 [2023-11-29 04:43:41,529 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 0 case distinctions, treesize of input 874 treesize of output 854 [2023-11-29 04:43:41,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 4063 treesize of output 4055 [2023-11-29 04:43:41,717 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 04:43:41,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:44:37,422 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_z_47 Int) (v_ArrVal_1044 Int) (|v_ULTIMATE.start_downsweep_~n#1_49| Int) (v_ArrVal_1040 (Array Int Int))) (let ((.cse3 (store |c_#memory_int#1| |c_ULTIMATE.start_main_~a0~0#1.base| (let ((.cse19 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (store (store v_ArrVal_1040 (+ |c_ULTIMATE.start_main_~a0~0#1.offset| 4 .cse19) (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_main_~a0~0#1.base| v_ArrVal_1040) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4 .cse19))) (+ |c_ULTIMATE.start_main_~a0~0#1.offset| 8 .cse19) v_ArrVal_1044))))) (let ((.cse12 (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse14 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse4 (select .cse3 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse10 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse5 (+ (* |v_ULTIMATE.start_downsweep_~n#1_49| 4) (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse16 (store (let ((.cse17 (select .cse4 .cse10)) (.cse18 (select .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|))) (store (store .cse4 .cse10 (+ .cse17 .cse18)) .cse12 (+ (select .cse4 .cse12) .cse17 (select .cse4 .cse14) .cse18))) .cse5 0)) (.cse6 (+ (* v_z_47 8) 12 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse9 (select .cse16 .cse6)) (.cse8 (+ (* v_z_47 4) |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse7 (+ .cse9 (select .cse16 .cse8)))) (let ((.cse15 (store (store .cse16 .cse6 .cse7) .cse8 .cse9))) (let ((.cse11 (select .cse15 .cse10))) (let ((.cse0 (+ (select .cse15 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse11)) (.cse2 (select .cse15 .cse14))) (let ((.cse1 (select (store .cse3 |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse13 (select .cse15 .cse12))) (store (store (store (store (store (store (store .cse4 .cse5 0) .cse6 .cse7) .cse8 .cse9) .cse10 .cse0) |c_ULTIMATE.start_main_~a~0#1.offset| .cse11) .cse12 (+ .cse13 .cse2)) .cse14 .cse13))) |c_ULTIMATE.start_main_~a0~0#1.base|))) (or (< 5 |v_ULTIMATE.start_downsweep_~n#1_49|) (not (= .cse0 (select .cse1 |c_ULTIMATE.start_main_~a0~0#1.offset|))) (< v_z_47 0) (< (+ |c_ULTIMATE.start_main_~i~1#1| 3) |v_ULTIMATE.start_downsweep_~n#1_49|) (= (select .cse1 (+ |c_ULTIMATE.start_main_~a0~0#1.offset| 8)) .cse2) (< |v_ULTIMATE.start_downsweep_~n#1_49| (+ (* v_z_47 2) 4))))))))))))) is different from false [2023-11-29 04:44:37,808 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_z_47 Int) (v_ArrVal_1044 Int) (|v_ULTIMATE.start_downsweep_~n#1_49| Int) (v_ArrVal_1040 (Array Int Int))) (let ((.cse3 (store |c_#memory_int#1| |c_ULTIMATE.start_main_~a0~0#1.base| (let ((.cse19 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (store (store v_ArrVal_1040 (+ |c_ULTIMATE.start_main_~a0~0#1.offset| 8 .cse19) (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_main_~a0~0#1.base| v_ArrVal_1040) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset| .cse19))) (+ |c_ULTIMATE.start_main_~a0~0#1.offset| 12 .cse19) v_ArrVal_1044))))) (let ((.cse14 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse12 (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse10 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse4 (select .cse3 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse5 (+ (* |v_ULTIMATE.start_downsweep_~n#1_49| 4) (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse16 (store (let ((.cse17 (select .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse18 (select .cse4 .cse10))) (store (store .cse4 .cse10 (+ .cse17 .cse18)) .cse12 (+ .cse17 (select .cse4 .cse14) (select .cse4 .cse12) .cse18))) .cse5 0)) (.cse6 (+ (* v_z_47 8) 12 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse8 (+ (* v_z_47 4) |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse9 (select .cse16 .cse6))) (let ((.cse7 (+ (select .cse16 .cse8) .cse9))) (let ((.cse15 (store (store .cse16 .cse6 .cse7) .cse8 .cse9))) (let ((.cse11 (select .cse15 .cse10))) (let ((.cse1 (+ .cse11 (select .cse15 |c_ULTIMATE.start_main_~a~0#1.offset|))) (.cse2 (select .cse15 .cse14))) (let ((.cse0 (select (store .cse3 |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse13 (select .cse15 .cse12))) (store (store (store (store (store (store (store .cse4 .cse5 0) .cse6 .cse7) .cse8 .cse9) .cse10 .cse1) |c_ULTIMATE.start_main_~a~0#1.offset| .cse11) .cse12 (+ .cse2 .cse13)) .cse14 .cse13))) |c_ULTIMATE.start_main_~a0~0#1.base|))) (or (< (+ |c_ULTIMATE.start_main_~i~1#1| 4) |v_ULTIMATE.start_downsweep_~n#1_49|) (< 5 |v_ULTIMATE.start_downsweep_~n#1_49|) (not (= (select .cse0 |c_ULTIMATE.start_main_~a0~0#1.offset|) .cse1)) (< v_z_47 0) (< |v_ULTIMATE.start_downsweep_~n#1_49| (+ (* v_z_47 2) 4)) (= .cse2 (select .cse0 (+ |c_ULTIMATE.start_main_~a0~0#1.offset| 8)))))))))))))) is different from false [2023-11-29 04:44:38,002 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_z_47 Int) (v_ArrVal_1044 Int) (|v_ULTIMATE.start_downsweep_~n#1_49| Int) (v_ArrVal_1040 (Array Int Int))) (let ((.cse2 (+ |c_ULTIMATE.start_main_#t~malloc16#1.offset| 8)) (.cse15 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse4 (store |c_#memory_int#1| |c_ULTIMATE.start_main_#t~malloc16#1.base| (store (store v_ArrVal_1040 .cse2 (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_main_#t~malloc16#1.base| v_ArrVal_1040) |c_ULTIMATE.start_main_~a~0#1.base|) .cse15)) (+ |c_ULTIMATE.start_main_#t~malloc16#1.offset| 12) v_ArrVal_1044)))) (let ((.cse13 (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse11 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse5 (select .cse4 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse6 (+ (* |v_ULTIMATE.start_downsweep_~n#1_49| 4) (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse17 (store (let ((.cse18 (select .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse19 (select .cse5 .cse11))) (store (store .cse5 .cse11 (+ .cse18 .cse19)) .cse13 (+ .cse18 (select .cse5 .cse15) (select .cse5 .cse13) .cse19))) .cse6 0)) (.cse7 (+ (* v_z_47 8) 12 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse10 (select .cse17 .cse7)) (.cse9 (+ (* v_z_47 4) |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse8 (+ .cse10 (select .cse17 .cse9)))) (let ((.cse16 (store (store .cse17 .cse7 .cse8) .cse9 .cse10))) (let ((.cse12 (select .cse16 .cse11))) (let ((.cse0 (+ (select .cse16 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse12)) (.cse3 (select .cse16 .cse15))) (let ((.cse1 (select (store .cse4 |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse14 (select .cse16 .cse13))) (store (store (store (store (store (store (store .cse5 .cse6 0) .cse7 .cse8) .cse9 .cse10) .cse11 .cse0) |c_ULTIMATE.start_main_~a~0#1.offset| .cse12) .cse13 (+ .cse14 .cse3)) .cse15 .cse14))) |c_ULTIMATE.start_main_#t~malloc16#1.base|))) (or (not (= .cse0 (select .cse1 |c_ULTIMATE.start_main_#t~malloc16#1.offset|))) (= (select .cse1 .cse2) .cse3) (< 4 |v_ULTIMATE.start_downsweep_~n#1_49|) (< v_z_47 0) (< |v_ULTIMATE.start_downsweep_~n#1_49| (+ (* v_z_47 2) 4)))))))))))))) is different from false [2023-11-29 04:44:38,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509952108] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:44:38,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 04:44:38,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 41] total 72 [2023-11-29 04:44:38,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112095040] [2023-11-29 04:44:38,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 04:44:38,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-11-29 04:44:38,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:44:38,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-11-29 04:44:38,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=9691, Unknown=5, NotChecked=612, Total=11130 [2023-11-29 04:44:38,150 INFO L87 Difference]: Start difference. First operand 162 states and 207 transitions. Second operand has 72 states, 67 states have (on average 1.4477611940298507) internal successors, (97), 68 states have internal predecessors, (97), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 04:45:12,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:45:12,218 INFO L93 Difference]: Finished difference Result 259 states and 328 transitions. [2023-11-29 04:45:12,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-11-29 04:45:12,219 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 67 states have (on average 1.4477611940298507) internal successors, (97), 68 states have internal predecessors, (97), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2023-11-29 04:45:12,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:45:12,220 INFO L225 Difference]: With dead ends: 259 [2023-11-29 04:45:12,220 INFO L226 Difference]: Without dead ends: 229 [2023-11-29 04:45:12,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 164 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 5915 ImplicationChecksByTransitivity, 94.8s TimeCoverageRelationStatistics Valid=3729, Invalid=22684, Unknown=5, NotChecked=972, Total=27390 [2023-11-29 04:45:12,222 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 676 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 2323 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 2466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:45:12,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 311 Invalid, 2466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2323 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-11-29 04:45:12,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2023-11-29 04:45:12,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 177. [2023-11-29 04:45:12,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 164 states have (on average 1.225609756097561) internal successors, (201), 164 states have internal predecessors, (201), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 04:45:12,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 221 transitions. [2023-11-29 04:45:12,353 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 221 transitions. Word has length 65 [2023-11-29 04:45:12,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:45:12,354 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 221 transitions. [2023-11-29 04:45:12,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 67 states have (on average 1.4477611940298507) internal successors, (97), 68 states have internal predecessors, (97), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 04:45:12,354 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 221 transitions. [2023-11-29 04:45:12,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-29 04:45:12,355 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:45:12,355 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:45:12,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 04:45:12,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 04:45:12,556 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:45:12,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:45:12,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1966345517, now seen corresponding path program 11 times [2023-11-29 04:45:12,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:45:12,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788267460] [2023-11-29 04:45:12,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:45:12,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:45:12,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:13,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:45:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:13,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 04:45:13,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:13,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 04:45:13,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:13,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 04:45:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:13,085 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 58 proven. 31 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-29 04:45:13,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:45:13,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788267460] [2023-11-29 04:45:13,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788267460] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:45:13,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170389612] [2023-11-29 04:45:13,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:45:13,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:45:13,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:45:13,088 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:45:13,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 04:45:15,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-11-29 04:45:15,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:45:15,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 04:45:15,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:45:15,683 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 65 proven. 10 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-29 04:45:15,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:45:15,836 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 65 proven. 10 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-29 04:45:15,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170389612] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:45:15,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:45:15,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 25 [2023-11-29 04:45:15,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675042408] [2023-11-29 04:45:15,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:45:15,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 04:45:15,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:45:15,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 04:45:15,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2023-11-29 04:45:15,839 INFO L87 Difference]: Start difference. First operand 177 states and 221 transitions. Second operand has 25 states, 25 states have (on average 3.24) internal successors, (81), 24 states have internal predecessors, (81), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:45:16,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:45:16,320 INFO L93 Difference]: Finished difference Result 203 states and 247 transitions. [2023-11-29 04:45:16,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 04:45:16,320 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.24) internal successors, (81), 24 states have internal predecessors, (81), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 77 [2023-11-29 04:45:16,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:45:16,321 INFO L225 Difference]: With dead ends: 203 [2023-11-29 04:45:16,321 INFO L226 Difference]: Without dead ends: 150 [2023-11-29 04:45:16,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 146 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2023-11-29 04:45:16,322 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 31 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:45:16,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 197 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:45:16,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-11-29 04:45:16,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 137. [2023-11-29 04:45:16,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 127 states have (on average 1.236220472440945) internal successors, (157), 127 states have internal predecessors, (157), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 04:45:16,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 171 transitions. [2023-11-29 04:45:16,477 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 171 transitions. Word has length 77 [2023-11-29 04:45:16,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:45:16,477 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 171 transitions. [2023-11-29 04:45:16,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.24) internal successors, (81), 24 states have internal predecessors, (81), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:45:16,477 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 171 transitions. [2023-11-29 04:45:16,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-29 04:45:16,479 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:45:16,479 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:45:16,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 04:45:16,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 04:45:16,679 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:45:16,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:45:16,680 INFO L85 PathProgramCache]: Analyzing trace with hash -199045204, now seen corresponding path program 12 times [2023-11-29 04:45:16,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:45:16,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465056568] [2023-11-29 04:45:16,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:45:16,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:45:16,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:17,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:45:17,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:17,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 04:45:17,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:17,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 04:45:17,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:17,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 04:45:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:17,103 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-29 04:45:17,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:45:17,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465056568] [2023-11-29 04:45:17,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465056568] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:45:17,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174941690] [2023-11-29 04:45:17,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:45:17,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:45:17,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:45:17,106 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:45:17,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 04:45:17,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-29 04:45:17,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:45:17,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 04:45:17,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:45:18,061 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-11-29 04:45:18,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:45:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-11-29 04:45:18,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174941690] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:45:18,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:45:18,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 18 [2023-11-29 04:45:18,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986894892] [2023-11-29 04:45:18,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:45:18,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 04:45:18,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:45:18,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 04:45:18,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-11-29 04:45:18,181 INFO L87 Difference]: Start difference. First operand 137 states and 171 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:45:18,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:45:18,599 INFO L93 Difference]: Finished difference Result 171 states and 208 transitions. [2023-11-29 04:45:18,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 04:45:18,600 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 82 [2023-11-29 04:45:18,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:45:18,601 INFO L225 Difference]: With dead ends: 171 [2023-11-29 04:45:18,601 INFO L226 Difference]: Without dead ends: 130 [2023-11-29 04:45:18,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 159 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2023-11-29 04:45:18,602 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 104 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:45:18,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 136 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:45:18,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-11-29 04:45:18,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 110. [2023-11-29 04:45:18,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 100 states have (on average 1.2) internal successors, (120), 100 states have internal predecessors, (120), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 04:45:18,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 134 transitions. [2023-11-29 04:45:18,703 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 134 transitions. Word has length 82 [2023-11-29 04:45:18,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:45:18,703 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 134 transitions. [2023-11-29 04:45:18,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:45:18,704 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 134 transitions. [2023-11-29 04:45:18,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-29 04:45:18,704 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:45:18,705 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:45:18,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 04:45:18,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 04:45:18,905 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:45:18,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:45:18,906 INFO L85 PathProgramCache]: Analyzing trace with hash -213700357, now seen corresponding path program 13 times [2023-11-29 04:45:18,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:45:18,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760642884] [2023-11-29 04:45:18,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:45:18,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:45:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:19,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:45:19,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:19,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 04:45:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:19,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 04:45:19,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:19,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 04:45:19,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:19,436 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2023-11-29 04:45:19,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:45:19,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760642884] [2023-11-29 04:45:19,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760642884] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:45:19,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127284759] [2023-11-29 04:45:19,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:45:19,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:45:19,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:45:19,438 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:45:19,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 04:45:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:19,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 04:45:19,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:45:20,029 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 72 proven. 15 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-29 04:45:20,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:45:20,363 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 72 proven. 15 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-29 04:45:20,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127284759] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:45:20,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:45:20,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 30 [2023-11-29 04:45:20,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200489530] [2023-11-29 04:45:20,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:45:20,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 04:45:20,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:45:20,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 04:45:20,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2023-11-29 04:45:20,366 INFO L87 Difference]: Start difference. First operand 110 states and 134 transitions. Second operand has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 29 states have internal predecessors, (97), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:45:21,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:45:21,750 INFO L93 Difference]: Finished difference Result 219 states and 268 transitions. [2023-11-29 04:45:21,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 04:45:21,750 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 29 states have internal predecessors, (97), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 84 [2023-11-29 04:45:21,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:45:21,751 INFO L225 Difference]: With dead ends: 219 [2023-11-29 04:45:21,751 INFO L226 Difference]: Without dead ends: 117 [2023-11-29 04:45:21,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 150 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=338, Invalid=2314, Unknown=0, NotChecked=0, Total=2652 [2023-11-29 04:45:21,752 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 04:45:21,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 304 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 04:45:21,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-29 04:45:21,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2023-11-29 04:45:21,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 103 states have (on average 1.1844660194174756) internal successors, (122), 103 states have internal predecessors, (122), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 04:45:21,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2023-11-29 04:45:21,865 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 84 [2023-11-29 04:45:21,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:45:21,866 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2023-11-29 04:45:21,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 29 states have internal predecessors, (97), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:45:21,866 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2023-11-29 04:45:21,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-29 04:45:21,867 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:45:21,867 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:45:21,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 04:45:22,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 04:45:22,068 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:45:22,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:45:22,068 INFO L85 PathProgramCache]: Analyzing trace with hash 2013966165, now seen corresponding path program 14 times [2023-11-29 04:45:22,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:45:22,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274302543] [2023-11-29 04:45:22,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:45:22,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:45:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:22,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:45:22,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:22,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 04:45:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:22,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 04:45:22,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:22,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 04:45:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:22,484 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-11-29 04:45:22,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:45:22,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274302543] [2023-11-29 04:45:22,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274302543] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:45:22,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492612051] [2023-11-29 04:45:22,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:45:22,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:45:22,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:45:22,486 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:45:22,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 04:45:22,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:45:22,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:45:22,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 04:45:22,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:45:22,851 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 33 proven. 16 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-11-29 04:45:22,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:45:23,007 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 33 proven. 16 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-11-29 04:45:23,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492612051] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:45:23,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:45:23,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 21 [2023-11-29 04:45:23,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523187361] [2023-11-29 04:45:23,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:45:23,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 04:45:23,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:45:23,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 04:45:23,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-11-29 04:45:23,010 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:45:23,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:45:23,530 INFO L93 Difference]: Finished difference Result 168 states and 200 transitions. [2023-11-29 04:45:23,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 04:45:23,531 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 86 [2023-11-29 04:45:23,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:45:23,532 INFO L225 Difference]: With dead ends: 168 [2023-11-29 04:45:23,532 INFO L226 Difference]: Without dead ends: 122 [2023-11-29 04:45:23,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 164 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2023-11-29 04:45:23,533 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 143 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:45:23,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 182 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:45:23,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-29 04:45:23,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2023-11-29 04:45:23,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 110 states have (on average 1.1818181818181819) internal successors, (130), 110 states have internal predecessors, (130), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 04:45:23,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 144 transitions. [2023-11-29 04:45:23,649 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 144 transitions. Word has length 86 [2023-11-29 04:45:23,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:45:23,650 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 144 transitions. [2023-11-29 04:45:23,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:45:23,650 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 144 transitions. [2023-11-29 04:45:23,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-29 04:45:23,651 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:45:23,651 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:45:23,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 04:45:23,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 04:45:23,852 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:45:23,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:45:23,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1868790753, now seen corresponding path program 15 times [2023-11-29 04:45:23,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:45:23,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652121897] [2023-11-29 04:45:23,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:45:23,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:45:23,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:24,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:45:24,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:24,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 04:45:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:24,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 04:45:24,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:24,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 04:45:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:24,295 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-11-29 04:45:24,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:45:24,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652121897] [2023-11-29 04:45:24,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652121897] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:45:24,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934581700] [2023-11-29 04:45:24,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:45:24,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:45:24,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:45:24,297 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:45:24,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 04:45:24,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 04:45:24,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:45:24,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 04:45:24,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:45:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 24 proven. 14 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-29 04:45:25,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:45:25,314 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-29 04:45:25,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934581700] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:45:25,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:45:25,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 24 [2023-11-29 04:45:25,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213212250] [2023-11-29 04:45:25,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:45:25,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 04:45:25,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:45:25,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 04:45:25,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2023-11-29 04:45:25,316 INFO L87 Difference]: Start difference. First operand 120 states and 144 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:45:25,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:45:25,933 INFO L93 Difference]: Finished difference Result 162 states and 193 transitions. [2023-11-29 04:45:25,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 04:45:25,934 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 87 [2023-11-29 04:45:25,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:45:25,935 INFO L225 Difference]: With dead ends: 162 [2023-11-29 04:45:25,935 INFO L226 Difference]: Without dead ends: 136 [2023-11-29 04:45:25,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 165 SyntacticMatches, 10 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 04:45:25,936 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 177 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:45:25,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 178 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:45:25,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-11-29 04:45:26,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 121. [2023-11-29 04:45:26,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 111 states have (on average 1.1891891891891893) internal successors, (132), 111 states have internal predecessors, (132), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 04:45:26,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 146 transitions. [2023-11-29 04:45:26,057 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 146 transitions. Word has length 87 [2023-11-29 04:45:26,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:45:26,058 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 146 transitions. [2023-11-29 04:45:26,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:45:26,058 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 146 transitions. [2023-11-29 04:45:26,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-29 04:45:26,059 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:45:26,059 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:45:26,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 04:45:26,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:45:26,260 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:45:26,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:45:26,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1763072172, now seen corresponding path program 16 times [2023-11-29 04:45:26,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:45:26,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491676889] [2023-11-29 04:45:26,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:45:26,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:45:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:26,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:45:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:26,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 04:45:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:26,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 04:45:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:26,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 04:45:26,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:26,784 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-29 04:45:26,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:45:26,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491676889] [2023-11-29 04:45:26,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491676889] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:45:26,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987847362] [2023-11-29 04:45:26,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:45:26,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:45:26,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:45:26,787 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:45:26,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 04:45:26,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:45:26,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:45:26,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 04:45:26,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:45:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 76 proven. 21 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-11-29 04:45:27,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:45:27,584 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 76 proven. 21 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-11-29 04:45:27,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987847362] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:45:27,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:45:27,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 29 [2023-11-29 04:45:27,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818527261] [2023-11-29 04:45:27,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:45:27,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 04:45:27,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:45:27,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 04:45:27,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2023-11-29 04:45:27,587 INFO L87 Difference]: Start difference. First operand 121 states and 146 transitions. Second operand has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 28 states have internal predecessors, (89), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:45:28,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:45:28,238 INFO L93 Difference]: Finished difference Result 205 states and 248 transitions. [2023-11-29 04:45:28,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 04:45:28,238 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 28 states have internal predecessors, (89), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 88 [2023-11-29 04:45:28,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:45:28,239 INFO L225 Difference]: With dead ends: 205 [2023-11-29 04:45:28,239 INFO L226 Difference]: Without dead ends: 123 [2023-11-29 04:45:28,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 162 SyntacticMatches, 13 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=273, Invalid=1059, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 04:45:28,240 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 31 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:45:28,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 335 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:45:28,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-11-29 04:45:28,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2023-11-29 04:45:28,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 113 states have (on average 1.1858407079646018) internal successors, (134), 113 states have internal predecessors, (134), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 04:45:28,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 148 transitions. [2023-11-29 04:45:28,361 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 148 transitions. Word has length 88 [2023-11-29 04:45:28,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:45:28,361 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 148 transitions. [2023-11-29 04:45:28,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 28 states have internal predecessors, (89), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:45:28,361 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 148 transitions. [2023-11-29 04:45:28,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-29 04:45:28,362 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:45:28,362 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 6, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:45:28,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-29 04:45:28,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:45:28,563 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:45:28,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:45:28,563 INFO L85 PathProgramCache]: Analyzing trace with hash 146934281, now seen corresponding path program 17 times [2023-11-29 04:45:28,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:45:28,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053819293] [2023-11-29 04:45:28,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:45:28,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:45:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:29,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:45:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:29,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 04:45:29,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:29,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 04:45:29,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:29,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 04:45:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:29,034 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2023-11-29 04:45:29,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:45:29,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053819293] [2023-11-29 04:45:29,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053819293] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:45:29,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664601485] [2023-11-29 04:45:29,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:45:29,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:45:29,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:45:29,036 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:45:29,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 04:45:37,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-11-29 04:45:37,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:45:37,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 04:45:37,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:45:37,265 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 44 proven. 13 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-11-29 04:45:37,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:45:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 44 proven. 13 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-11-29 04:45:37,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664601485] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:45:37,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:45:37,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 28 [2023-11-29 04:45:37,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109861290] [2023-11-29 04:45:37,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:45:37,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 04:45:37,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:45:37,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 04:45:37,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2023-11-29 04:45:37,468 INFO L87 Difference]: Start difference. First operand 123 states and 148 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:45:38,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:45:38,034 INFO L93 Difference]: Finished difference Result 195 states and 236 transitions. [2023-11-29 04:45:38,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 04:45:38,034 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 89 [2023-11-29 04:45:38,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:45:38,036 INFO L225 Difference]: With dead ends: 195 [2023-11-29 04:45:38,036 INFO L226 Difference]: Without dead ends: 125 [2023-11-29 04:45:38,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 168 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=249, Invalid=941, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 04:45:38,037 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 126 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:45:38,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 192 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:45:38,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-11-29 04:45:38,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2023-11-29 04:45:38,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 115 states have (on average 1.182608695652174) internal successors, (136), 115 states have internal predecessors, (136), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-29 04:45:38,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 150 transitions. [2023-11-29 04:45:38,177 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 150 transitions. Word has length 89 [2023-11-29 04:45:38,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:45:38,178 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 150 transitions. [2023-11-29 04:45:38,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:45:38,178 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 150 transitions. [2023-11-29 04:45:38,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-29 04:45:38,179 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:45:38,179 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:45:38,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 04:45:38,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:45:38,379 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:45:38,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:45:38,380 INFO L85 PathProgramCache]: Analyzing trace with hash -255062601, now seen corresponding path program 18 times [2023-11-29 04:45:38,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:45:38,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762468992] [2023-11-29 04:45:38,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:45:38,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:45:38,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:38,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:45:38,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:38,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 04:45:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:38,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-29 04:45:38,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:38,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-29 04:45:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:38,980 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 58 proven. 48 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-29 04:45:38,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:45:38,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762468992] [2023-11-29 04:45:38,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762468992] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:45:38,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568845684] [2023-11-29 04:45:38,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:45:38,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:45:38,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:45:38,982 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:45:38,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 04:45:39,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-29 04:45:39,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:45:39,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 04:45:39,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:45:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2023-11-29 04:45:40,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:45:40,702 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2023-11-29 04:45:40,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568845684] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:45:40,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:45:40,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 11] total 38 [2023-11-29 04:45:40,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110192569] [2023-11-29 04:45:40,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:45:40,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 04:45:40,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:45:40,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 04:45:40,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1253, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 04:45:40,705 INFO L87 Difference]: Start difference. First operand 125 states and 150 transitions. Second operand has 38 states, 36 states have (on average 3.0) internal successors, (108), 35 states have internal predecessors, (108), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-29 04:45:42,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:45:42,871 INFO L93 Difference]: Finished difference Result 271 states and 328 transitions. [2023-11-29 04:45:42,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-29 04:45:42,871 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 3.0) internal successors, (108), 35 states have internal predecessors, (108), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 90 [2023-11-29 04:45:42,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:45:42,872 INFO L225 Difference]: With dead ends: 271 [2023-11-29 04:45:42,872 INFO L226 Difference]: Without dead ends: 94 [2023-11-29 04:45:42,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=751, Invalid=4651, Unknown=0, NotChecked=0, Total=5402 [2023-11-29 04:45:42,873 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 205 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 04:45:42,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 389 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 04:45:42,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-29 04:45:42,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-11-29 04:45:42,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 87 states have internal predecessors, (103), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 04:45:42,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2023-11-29 04:45:42,955 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 90 [2023-11-29 04:45:42,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:45:42,955 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2023-11-29 04:45:42,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 3.0) internal successors, (108), 35 states have internal predecessors, (108), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-29 04:45:42,955 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2023-11-29 04:45:42,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-29 04:45:42,956 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:45:42,956 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:45:42,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 04:45:43,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-29 04:45:43,157 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:45:43,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:45:43,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1290576623, now seen corresponding path program 19 times [2023-11-29 04:45:43,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:45:43,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219594199] [2023-11-29 04:45:43,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:45:43,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:45:43,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:43,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:45:43,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:43,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 04:45:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:43,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 04:45:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:43,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 04:45:43,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-29 04:45:43,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:45:43,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219594199] [2023-11-29 04:45:43,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219594199] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:45:43,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423907599] [2023-11-29 04:45:43,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:45:43,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:45:43,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:45:43,666 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:45:43,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 04:45:43,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:43,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 04:45:43,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:45:44,086 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 40 proven. 19 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-11-29 04:45:44,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:45:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 28 proven. 31 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-11-29 04:45:44,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423907599] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:45:44,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:45:44,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 29 [2023-11-29 04:45:44,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138196167] [2023-11-29 04:45:44,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:45:44,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 04:45:44,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:45:44,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 04:45:44,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2023-11-29 04:45:44,408 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:45:44,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:45:44,977 INFO L93 Difference]: Finished difference Result 140 states and 166 transitions. [2023-11-29 04:45:44,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 04:45:44,978 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 92 [2023-11-29 04:45:44,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:45:44,979 INFO L225 Difference]: With dead ends: 140 [2023-11-29 04:45:44,979 INFO L226 Difference]: Without dead ends: 114 [2023-11-29 04:45:44,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 171 SyntacticMatches, 12 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=392, Invalid=1168, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 04:45:44,979 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 163 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:45:44,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 267 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:45:44,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-29 04:45:45,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 95. [2023-11-29 04:45:45,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 88 states have internal predecessors, (105), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 04:45:45,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 113 transitions. [2023-11-29 04:45:45,064 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 113 transitions. Word has length 92 [2023-11-29 04:45:45,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:45:45,064 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 113 transitions. [2023-11-29 04:45:45,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:45:45,064 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 113 transitions. [2023-11-29 04:45:45,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-29 04:45:45,065 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:45:45,065 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:45:45,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 04:45:45,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-29 04:45:45,266 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:45:45,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:45:45,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1787126278, now seen corresponding path program 20 times [2023-11-29 04:45:45,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:45:45,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231473974] [2023-11-29 04:45:45,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:45:45,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:45:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:45,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:45:45,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:45,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 04:45:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:45,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 04:45:45,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:45,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 04:45:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:45,817 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 31 proven. 57 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2023-11-29 04:45:45,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:45:45,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231473974] [2023-11-29 04:45:45,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231473974] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:45:45,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984960090] [2023-11-29 04:45:45,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:45:45,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:45:45,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:45:45,818 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:45:45,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 04:45:46,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:45:46,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:45:46,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 04:45:46,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:45:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 38 proven. 48 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-11-29 04:45:46,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:45:46,777 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 38 proven. 48 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-11-29 04:45:46,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984960090] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:45:46,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:45:46,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 33 [2023-11-29 04:45:46,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797544054] [2023-11-29 04:45:46,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:45:46,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 04:45:46,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:45:46,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 04:45:46,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 04:45:46,779 INFO L87 Difference]: Start difference. First operand 95 states and 113 transitions. Second operand has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:45:47,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:45:47,600 INFO L93 Difference]: Finished difference Result 167 states and 206 transitions. [2023-11-29 04:45:47,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 04:45:47,601 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 93 [2023-11-29 04:45:47,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:45:47,603 INFO L225 Difference]: With dead ends: 167 [2023-11-29 04:45:47,603 INFO L226 Difference]: Without dead ends: 128 [2023-11-29 04:45:47,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 170 SyntacticMatches, 11 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 04:45:47,604 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 179 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:45:47,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 210 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 04:45:47,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-29 04:45:47,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 105. [2023-11-29 04:45:47,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 98 states have (on average 1.2142857142857142) internal successors, (119), 98 states have internal predecessors, (119), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-29 04:45:47,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2023-11-29 04:45:47,744 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 93 [2023-11-29 04:45:47,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:45:47,745 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2023-11-29 04:45:47,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-29 04:45:47,745 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2023-11-29 04:45:47,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-29 04:45:47,746 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:45:47,747 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:45:47,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 04:45:47,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-29 04:45:47,947 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:45:47,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:45:47,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1710121141, now seen corresponding path program 21 times [2023-11-29 04:45:47,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:45:47,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710516089] [2023-11-29 04:45:47,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:45:47,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:45:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:48,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 04:45:48,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:48,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-29 04:45:48,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:48,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 04:45:48,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:48,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-29 04:45:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:45:48,177 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2023-11-29 04:45:48,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:45:48,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710516089] [2023-11-29 04:45:48,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710516089] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:45:48,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045391449] [2023-11-29 04:45:48,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:45:48,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:45:48,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:45:48,179 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:45:48,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 04:45:49,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 04:45:49,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:45:49,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-29 04:45:49,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:45:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2023-11-29 04:45:50,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:45:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 16 proven. 61 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-11-29 04:45:52,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045391449] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:45:52,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:45:52,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 18, 24] total 45 [2023-11-29 04:45:52,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653561856] [2023-11-29 04:45:52,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:45:52,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-29 04:45:52,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:45:52,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-29 04:45:52,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1725, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 04:45:52,159 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand has 45 states, 43 states have (on average 2.372093023255814) internal successors, (102), 44 states have internal predecessors, (102), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-29 04:46:06,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:46:06,794 INFO L93 Difference]: Finished difference Result 526 states and 682 transitions. [2023-11-29 04:46:06,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2023-11-29 04:46:06,795 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 2.372093023255814) internal successors, (102), 44 states have internal predecessors, (102), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 5 states have call successors, (10) Word has length 94 [2023-11-29 04:46:06,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:46:06,798 INFO L225 Difference]: With dead ends: 526 [2023-11-29 04:46:06,798 INFO L226 Difference]: Without dead ends: 329 [2023-11-29 04:46:06,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4079 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=3727, Invalid=15179, Unknown=0, NotChecked=0, Total=18906 [2023-11-29 04:46:06,800 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 290 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 1833 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 1878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:46:06,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 829 Invalid, 1878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1833 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-29 04:46:06,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-11-29 04:46:07,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 137. [2023-11-29 04:46:07,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 124 states have (on average 1.2016129032258065) internal successors, (149), 124 states have internal predecessors, (149), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-29 04:46:07,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 169 transitions. [2023-11-29 04:46:07,007 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 169 transitions. Word has length 94 [2023-11-29 04:46:07,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:46:07,007 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 169 transitions. [2023-11-29 04:46:07,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 2.372093023255814) internal successors, (102), 44 states have internal predecessors, (102), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-29 04:46:07,008 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 169 transitions. [2023-11-29 04:46:07,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-29 04:46:07,008 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:46:07,009 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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 04:46:07,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-29 04:46:07,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4afe35cd-9c6f-4a7b-a089-6aa0a3c36e9c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:46:07,209 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:46:07,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:46:07,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1234766507, now seen corresponding path program 22 times [2023-11-29 04:46:07,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:46:07,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542692722] [2023-11-29 04:46:07,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:46:07,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:46:07,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat