./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_m5.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_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/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_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_m5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/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_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/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 afdb8b285c2183da613babde617c7580c3aee6b3bc694b080468400e828cda16 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 04:01:47,483 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 04:01:47,564 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 04:01:47,568 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 04:01:47,569 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 04:01:47,590 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 04:01:47,590 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 04:01:47,591 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 04:01:47,591 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 04:01:47,592 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 04:01:47,592 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 04:01:47,593 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 04:01:47,594 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 04:01:47,594 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 04:01:47,595 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 04:01:47,595 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 04:01:47,596 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 04:01:47,596 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 04:01:47,596 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 04:01:47,597 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 04:01:47,597 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 04:01:47,599 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 04:01:47,600 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 04:01:47,600 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 04:01:47,600 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 04:01:47,601 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 04:01:47,601 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 04:01:47,601 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 04:01:47,602 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 04:01:47,602 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 04:01:47,602 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 04:01:47,603 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:01:47,603 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 04:01:47,603 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 04:01:47,604 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 04:01:47,604 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 04:01:47,604 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 04:01:47,605 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 04:01:47,605 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 04:01:47,605 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 04:01:47,606 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 04:01:47,606 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 04:01:47,607 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_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> afdb8b285c2183da613babde617c7580c3aee6b3bc694b080468400e828cda16 [2023-11-29 04:01:47,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 04:01:47,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 04:01:47,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 04:01:47,872 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 04:01:47,872 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 04:01:47,873 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-crafted/zero_sum_m5.c [2023-11-29 04:01:50,598 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 04:01:50,801 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 04:01:50,801 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/sv-benchmarks/c/array-crafted/zero_sum_m5.c [2023-11-29 04:01:50,807 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/data/3fa6a044b/c8becd06153e409fb94dcc437e046f30/FLAG304f9b9d9 [2023-11-29 04:01:50,821 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/data/3fa6a044b/c8becd06153e409fb94dcc437e046f30 [2023-11-29 04:01:50,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 04:01:50,825 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 04:01:50,826 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 04:01:50,826 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 04:01:50,831 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 04:01:50,831 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:01:50" (1/1) ... [2023-11-29 04:01:50,832 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2151f4c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:01:50, skipping insertion in model container [2023-11-29 04:01:50,832 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:01:50" (1/1) ... [2023-11-29 04:01:50,857 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:01:51,032 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_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/sv-benchmarks/c/array-crafted/zero_sum_m5.c[402,415] [2023-11-29 04:01:51,061 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:01:51,072 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 04:01:51,087 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_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/sv-benchmarks/c/array-crafted/zero_sum_m5.c[402,415] [2023-11-29 04:01:51,101 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:01:51,118 INFO L206 MainTranslator]: Completed translation [2023-11-29 04:01:51,118 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:01:51 WrapperNode [2023-11-29 04:01:51,118 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 04:01:51,120 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 04:01:51,120 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 04:01:51,120 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 04:01:51,128 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:01:51" (1/1) ... [2023-11-29 04:01:51,136 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:01:51" (1/1) ... [2023-11-29 04:01:51,164 INFO L138 Inliner]: procedures = 15, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 152 [2023-11-29 04:01:51,164 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 04:01:51,165 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 04:01:51,165 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 04:01:51,165 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 04:01:51,178 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:01:51" (1/1) ... [2023-11-29 04:01:51,179 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:01:51" (1/1) ... [2023-11-29 04:01:51,184 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:01:51" (1/1) ... [2023-11-29 04:01:51,207 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2023-11-29 04:01:51,207 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:01:51" (1/1) ... [2023-11-29 04:01:51,208 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:01:51" (1/1) ... [2023-11-29 04:01:51,215 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:01:51" (1/1) ... [2023-11-29 04:01:51,234 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:01:51" (1/1) ... [2023-11-29 04:01:51,236 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:01:51" (1/1) ... [2023-11-29 04:01:51,237 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:01:51" (1/1) ... [2023-11-29 04:01:51,240 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 04:01:51,241 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 04:01:51,241 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 04:01:51,242 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 04:01:51,243 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:01:51" (1/1) ... [2023-11-29 04:01:51,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:01:51,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:01:51,300 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 04:01:51,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 04:01:51,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 04:01:51,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 04:01:51,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 04:01:51,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 04:01:51,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 04:01:51,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 04:01:51,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 04:01:51,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 04:01:51,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 04:01:51,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 04:01:51,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 04:01:51,443 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 04:01:51,445 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 04:01:51,662 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 04:01:51,715 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 04:01:51,716 INFO L309 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-29 04:01:51,716 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:01:51 BoogieIcfgContainer [2023-11-29 04:01:51,716 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 04:01:51,719 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 04:01:51,719 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 04:01:51,723 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 04:01:51,724 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 04:01:50" (1/3) ... [2023-11-29 04:01:51,724 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ac12c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:01:51, skipping insertion in model container [2023-11-29 04:01:51,725 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:01:51" (2/3) ... [2023-11-29 04:01:51,725 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ac12c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:01:51, skipping insertion in model container [2023-11-29 04:01:51,725 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:01:51" (3/3) ... [2023-11-29 04:01:51,727 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_m5.c [2023-11-29 04:01:51,743 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 04:01:51,743 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 04:01:51,791 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:01:51,797 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;@5968474b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:01:51,798 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 04:01:51,802 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:01:51,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 04:01:51,808 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:01:51,809 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:01:51,809 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:01:51,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:01:51,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1439288402, now seen corresponding path program 1 times [2023-11-29 04:01:51,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:01:51,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786416933] [2023-11-29 04:01:51,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:01:51,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:01:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:01:51,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:01:51,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:01:51,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786416933] [2023-11-29 04:01:51,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786416933] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:01:51,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:01:51,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:01:51,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523157182] [2023-11-29 04:01:51,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:01:51,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 04:01:51,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:01:52,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 04:01:52,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 04:01:52,017 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:01:52,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:01:52,069 INFO L93 Difference]: Finished difference Result 57 states and 100 transitions. [2023-11-29 04:01:52,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 04:01:52,072 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-29 04:01:52,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:01:52,081 INFO L225 Difference]: With dead ends: 57 [2023-11-29 04:01:52,081 INFO L226 Difference]: Without dead ends: 27 [2023-11-29 04:01:52,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 04:01:52,089 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:01:52,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:01:52,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-29 04:01:52,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-29 04:01:52,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:01:52,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2023-11-29 04:01:52,128 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 26 [2023-11-29 04:01:52,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:01:52,129 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2023-11-29 04:01:52,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:01:52,129 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2023-11-29 04:01:52,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 04:01:52,131 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:01:52,131 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:01:52,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 04:01:52,131 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:01:52,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:01:52,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1795376710, now seen corresponding path program 1 times [2023-11-29 04:01:52,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:01:52,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621968792] [2023-11-29 04:01:52,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:01:52,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:01:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:01:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:01:52,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:01:52,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621968792] [2023-11-29 04:01:52,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621968792] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:01:52,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:01:52,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:01:52,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282344126] [2023-11-29 04:01:52,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:01:52,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:01:52,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:01:52,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:01:52,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:01:52,276 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:01:52,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:01:52,337 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2023-11-29 04:01:52,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:01:52,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-29 04:01:52,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:01:52,339 INFO L225 Difference]: With dead ends: 52 [2023-11-29 04:01:52,339 INFO L226 Difference]: Without dead ends: 28 [2023-11-29 04:01:52,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:01:52,342 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:01:52,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:01:52,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-29 04:01:52,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-29 04:01:52,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:01:52,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2023-11-29 04:01:52,351 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 26 [2023-11-29 04:01:52,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:01:52,352 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2023-11-29 04:01:52,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:01:52,352 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2023-11-29 04:01:52,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 04:01:52,353 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:01:52,353 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:01:52,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 04:01:52,354 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:01:52,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:01:52,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1649880805, now seen corresponding path program 1 times [2023-11-29 04:01:52,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:01:52,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072499581] [2023-11-29 04:01:52,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:01:52,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:01:52,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:01:52,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:01:52,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:01:52,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072499581] [2023-11-29 04:01:52,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072499581] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:01:52,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:01:52,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 04:01:52,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875563000] [2023-11-29 04:01:52,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:01:52,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:01:52,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:01:52,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:01:52,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:01:52,469 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:01:52,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:01:52,567 INFO L93 Difference]: Finished difference Result 60 states and 88 transitions. [2023-11-29 04:01:52,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:01:52,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-29 04:01:52,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:01:52,568 INFO L225 Difference]: With dead ends: 60 [2023-11-29 04:01:52,569 INFO L226 Difference]: Without dead ends: 38 [2023-11-29 04:01:52,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:01:52,571 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:01:52,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 17 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:01:52,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-29 04:01:52,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-11-29 04:01:52,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:01:52,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2023-11-29 04:01:52,582 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 27 [2023-11-29 04:01:52,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:01:52,582 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2023-11-29 04:01:52,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:01:52,583 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2023-11-29 04:01:52,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 04:01:52,584 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:01:52,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:01:52,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 04:01:52,585 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:01:52,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:01:52,585 INFO L85 PathProgramCache]: Analyzing trace with hash -903484266, now seen corresponding path program 1 times [2023-11-29 04:01:52,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:01:52,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246360288] [2023-11-29 04:01:52,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:01:52,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:01:52,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:01:52,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 04:01:52,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:01:52,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246360288] [2023-11-29 04:01:52,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246360288] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:01:52,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293580201] [2023-11-29 04:01:52,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:01:52,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:01:52,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:01:52,761 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:01:52,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 04:01:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:01:52,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 04:01:52,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:01:52,928 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 04:01:52,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:01:52,958 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 04:01:52,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293580201] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:01:52,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:01:52,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-29 04:01:52,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219694358] [2023-11-29 04:01:52,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:01:52,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:01:52,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:01:52,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:01:52,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:01:52,961 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:01:53,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:01:53,038 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2023-11-29 04:01:53,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:01:53,038 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-29 04:01:53,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:01:53,039 INFO L225 Difference]: With dead ends: 73 [2023-11-29 04:01:53,039 INFO L226 Difference]: Without dead ends: 39 [2023-11-29 04:01:53,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:01:53,041 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:01:53,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:01:53,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-29 04:01:53,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-11-29 04:01:53,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:01:53,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2023-11-29 04:01:53,051 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 37 [2023-11-29 04:01:53,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:01:53,051 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2023-11-29 04:01:53,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:01:53,052 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2023-11-29 04:01:53,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 04:01:53,053 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:01:53,053 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:01:53,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 04:01:53,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:01:53,259 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:01:53,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:01:53,260 INFO L85 PathProgramCache]: Analyzing trace with hash -702104937, now seen corresponding path program 2 times [2023-11-29 04:01:53,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:01:53,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033902829] [2023-11-29 04:01:53,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:01:53,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:01:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:01:53,372 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 04:01:53,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:01:53,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033902829] [2023-11-29 04:01:53,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033902829] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:01:53,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336897688] [2023-11-29 04:01:53,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:01:53,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:01:53,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:01:53,380 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:01:53,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 04:01:53,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:01:53,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:01:53,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 04:01:53,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:01:53,544 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 04:01:53,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:01:53,607 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 04:01:53,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336897688] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:01:53,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:01:53,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-29 04:01:53,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039351360] [2023-11-29 04:01:53,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:01:53,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 04:01:53,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:01:53,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 04:01:53,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-29 04:01:53,610 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:01:53,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:01:53,728 INFO L93 Difference]: Finished difference Result 80 states and 108 transitions. [2023-11-29 04:01:53,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:01:53,729 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-11-29 04:01:53,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:01:53,730 INFO L225 Difference]: With dead ends: 80 [2023-11-29 04:01:53,730 INFO L226 Difference]: Without dead ends: 49 [2023-11-29 04:01:53,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-29 04:01:53,731 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:01:53,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 23 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:01:53,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-29 04:01:53,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-29 04:01:53,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:01:53,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2023-11-29 04:01:53,740 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 38 [2023-11-29 04:01:53,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:01:53,740 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2023-11-29 04:01:53,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:01:53,740 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2023-11-29 04:01:53,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-29 04:01:53,741 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:01:53,741 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 04:01:53,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 04:01:53,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:01:53,947 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:01:53,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:01:53,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1904690106, now seen corresponding path program 3 times [2023-11-29 04:01:53,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:01:53,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977832057] [2023-11-29 04:01:53,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:01:53,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:01:54,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:01:58,165 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:01:58,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:01:58,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977832057] [2023-11-29 04:01:58,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977832057] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:01:58,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597867690] [2023-11-29 04:01:58,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:01:58,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:01:58,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:01:58,167 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:01:58,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 04:01:58,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 04:01:58,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:01:58,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 96 conjunts are in the unsatisfiable core [2023-11-29 04:01:58,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:01:58,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:01:58,687 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:01:58,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:02:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 04:02:00,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597867690] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:02:00,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:02:00,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 29] total 54 [2023-11-29 04:02:00,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151239796] [2023-11-29 04:02:00,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:02:00,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-29 04:02:00,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:00,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-29 04:02:00,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2714, Unknown=0, NotChecked=0, Total=2862 [2023-11-29 04:02:00,223 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 54 states, 54 states have (on average 1.7037037037037037) internal successors, (92), 54 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:02:01,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:01,410 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2023-11-29 04:02:01,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 04:02:01,416 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.7037037037037037) internal successors, (92), 54 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-11-29 04:02:01,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:01,418 INFO L225 Difference]: With dead ends: 90 [2023-11-29 04:02:01,418 INFO L226 Difference]: Without dead ends: 86 [2023-11-29 04:02:01,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=154, Invalid=2816, Unknown=0, NotChecked=0, Total=2970 [2023-11-29 04:02:01,421 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 1727 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:01,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 347 Invalid, 1728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1727 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 04:02:01,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-29 04:02:01,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2023-11-29 04:02:01,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.2409638554216869) internal successors, (103), 83 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:02:01,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 103 transitions. [2023-11-29 04:02:01,439 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 103 transitions. Word has length 48 [2023-11-29 04:02:01,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:02:01,439 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 103 transitions. [2023-11-29 04:02:01,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.7037037037037037) internal successors, (92), 54 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:02:01,440 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 103 transitions. [2023-11-29 04:02:01,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-29 04:02:01,441 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:01,441 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-11-29 04:02:01,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 04:02:01,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:01,644 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:01,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:01,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1358968049, now seen corresponding path program 4 times [2023-11-29 04:02:01,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:01,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432535832] [2023-11-29 04:02:01,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:01,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:01,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:01,768 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-29 04:02:01,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:01,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432535832] [2023-11-29 04:02:01,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432535832] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:02:01,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874728168] [2023-11-29 04:02:01,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:02:01,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:01,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:01,770 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:01,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 04:02:01,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:02:01,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:02:01,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:02:01,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:01,957 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-29 04:02:01,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:02:02,044 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-29 04:02:02,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874728168] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:02:02,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:02:02,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-11-29 04:02:02,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241467048] [2023-11-29 04:02:02,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:02:02,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 04:02:02,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:02,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 04:02:02,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-11-29 04:02:02,046 INFO L87 Difference]: Start difference. First operand 84 states and 103 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:02:02,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:02,575 INFO L93 Difference]: Finished difference Result 177 states and 224 transitions. [2023-11-29 04:02:02,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 04:02:02,575 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-11-29 04:02:02,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:02,576 INFO L225 Difference]: With dead ends: 177 [2023-11-29 04:02:02,576 INFO L226 Difference]: Without dead ends: 96 [2023-11-29 04:02:02,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 84 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2023-11-29 04:02:02,578 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 113 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:02,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 85 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 04:02:02,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-29 04:02:02,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2023-11-29 04:02:02,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.2159090909090908) internal successors, (107), 88 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:02:02,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2023-11-29 04:02:02,593 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 49 [2023-11-29 04:02:02,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:02:02,593 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2023-11-29 04:02:02,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:02:02,593 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2023-11-29 04:02:02,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 04:02:02,595 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:02,595 INFO L195 NwaCegarLoop]: trace histogram [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 04:02:02,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 04:02:02,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 04:02:02,797 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:02,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:02,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1405545912, now seen corresponding path program 5 times [2023-11-29 04:02:02,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:02,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033298631] [2023-11-29 04:02:02,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:02,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:02,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:02,954 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 04:02:02,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:02,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033298631] [2023-11-29 04:02:02,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033298631] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:02:02,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732421521] [2023-11-29 04:02:02,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:02:02,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:02,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:02,957 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:02,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 04:02:03,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 04:02:03,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:02:03,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:02:03,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 04:02:03,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:02:03,200 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 04:02:03,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732421521] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:02:03,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:02:03,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-29 04:02:03,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181999721] [2023-11-29 04:02:03,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:02:03,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 04:02:03,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:03,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 04:02:03,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-29 04:02:03,203 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:02:03,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:03,331 INFO L93 Difference]: Finished difference Result 134 states and 160 transitions. [2023-11-29 04:02:03,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 04:02:03,332 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-11-29 04:02:03,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:03,332 INFO L225 Difference]: With dead ends: 134 [2023-11-29 04:02:03,332 INFO L226 Difference]: Without dead ends: 60 [2023-11-29 04:02:03,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 89 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-29 04:02:03,334 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:03,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 56 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:02:03,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-29 04:02:03,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-11-29 04:02:03,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 59 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:02:03,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2023-11-29 04:02:03,344 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 50 [2023-11-29 04:02:03,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:02:03,344 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2023-11-29 04:02:03,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:02:03,345 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2023-11-29 04:02:03,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-29 04:02:03,346 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:03,346 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 04:02:03,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 04:02:03,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:03,547 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:03,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:03,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1880623638, now seen corresponding path program 6 times [2023-11-29 04:02:03,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:03,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566314622] [2023-11-29 04:02:03,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:03,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:03,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:08,969 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:02:08,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:08,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566314622] [2023-11-29 04:02:08,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566314622] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:02:08,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281410147] [2023-11-29 04:02:08,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:02:08,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:08,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:08,971 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:08,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 04:02:09,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 04:02:09,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:02:09,064 WARN L260 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 130 conjunts are in the unsatisfiable core [2023-11-29 04:02:09,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:10,935 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:02:10,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:02:14,610 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:02:14,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 89 [2023-11-29 04:02:14,847 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:02:14,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281410147] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:02:14,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:02:14,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 36, 39] total 108 [2023-11-29 04:02:14,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388430989] [2023-11-29 04:02:14,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:02:14,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2023-11-29 04:02:14,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:14,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2023-11-29 04:02:14,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=11207, Unknown=0, NotChecked=0, Total=11556 [2023-11-29 04:02:14,853 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 108 states, 108 states have (on average 1.4444444444444444) internal successors, (156), 108 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:02:28,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:28,276 INFO L93 Difference]: Finished difference Result 199 states and 238 transitions. [2023-11-29 04:02:28,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-11-29 04:02:28,277 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.4444444444444444) internal successors, (156), 108 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-11-29 04:02:28,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:28,278 INFO L225 Difference]: With dead ends: 199 [2023-11-29 04:02:28,278 INFO L226 Difference]: Without dead ends: 193 [2023-11-29 04:02:28,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6147 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=1274, Invalid=26782, Unknown=0, NotChecked=0, Total=28056 [2023-11-29 04:02:28,285 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 341 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 8465 mSolverCounterSat, 842 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 9307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 842 IncrementalHoareTripleChecker+Valid, 8465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:28,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 595 Invalid, 9307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [842 Valid, 8465 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-11-29 04:02:28,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-11-29 04:02:28,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 110. [2023-11-29 04:02:28,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.2110091743119267) internal successors, (132), 109 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:02:28,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 132 transitions. [2023-11-29 04:02:28,324 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 132 transitions. Word has length 59 [2023-11-29 04:02:28,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:02:28,324 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 132 transitions. [2023-11-29 04:02:28,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.4444444444444444) internal successors, (156), 108 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:02:28,325 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 132 transitions. [2023-11-29 04:02:28,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-29 04:02:28,326 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:28,326 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 04:02:28,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 04:02:28,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 04:02:28,527 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:28,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:28,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1993316346, now seen corresponding path program 7 times [2023-11-29 04:02:28,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:28,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669519225] [2023-11-29 04:02:28,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:28,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:28,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:28,665 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-29 04:02:28,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:28,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669519225] [2023-11-29 04:02:28,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669519225] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:02:28,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338279236] [2023-11-29 04:02:28,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:02:28,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:28,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:28,667 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:28,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 04:02:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:28,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 04:02:28,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:28,855 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-29 04:02:28,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:02:28,943 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-29 04:02:28,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338279236] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:02:28,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:02:28,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-29 04:02:28,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076220856] [2023-11-29 04:02:28,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:02:28,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 04:02:28,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:28,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 04:02:28,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-11-29 04:02:28,945 INFO L87 Difference]: Start difference. First operand 110 states and 132 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:02:29,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:29,202 INFO L93 Difference]: Finished difference Result 223 states and 266 transitions. [2023-11-29 04:02:29,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 04:02:29,203 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-11-29 04:02:29,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:29,204 INFO L225 Difference]: With dead ends: 223 [2023-11-29 04:02:29,204 INFO L226 Difference]: Without dead ends: 84 [2023-11-29 04:02:29,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 107 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-11-29 04:02:29,206 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 53 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:29,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 80 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:02:29,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-29 04:02:29,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-11-29 04:02:29,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1927710843373494) internal successors, (99), 83 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:02:29,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 99 transitions. [2023-11-29 04:02:29,239 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 99 transitions. Word has length 60 [2023-11-29 04:02:29,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:02:29,239 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 99 transitions. [2023-11-29 04:02:29,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:02:29,240 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 99 transitions. [2023-11-29 04:02:29,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-29 04:02:29,240 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:29,241 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 04:02:29,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 04:02:29,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 04:02:29,441 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:29,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:29,442 INFO L85 PathProgramCache]: Analyzing trace with hash 667457753, now seen corresponding path program 8 times [2023-11-29 04:02:29,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:29,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666093806] [2023-11-29 04:02:29,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:29,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:29,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:29,590 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-29 04:02:29,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:29,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666093806] [2023-11-29 04:02:29,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666093806] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:02:29,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970334305] [2023-11-29 04:02:29,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:02:29,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:29,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:29,592 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:29,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 04:02:29,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:02:29,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:02:29,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 04:02:29,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:29,751 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-29 04:02:29,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:02:29,812 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-29 04:02:29,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970334305] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:02:29,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:02:29,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-29 04:02:29,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741344924] [2023-11-29 04:02:29,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:02:29,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 04:02:29,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:29,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 04:02:29,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-11-29 04:02:29,814 INFO L87 Difference]: Start difference. First operand 84 states and 99 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:02:29,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:02:29,979 INFO L93 Difference]: Finished difference Result 143 states and 176 transitions. [2023-11-29 04:02:29,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 04:02:29,980 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-11-29 04:02:29,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:02:29,980 INFO L225 Difference]: With dead ends: 143 [2023-11-29 04:02:29,980 INFO L226 Difference]: Without dead ends: 71 [2023-11-29 04:02:29,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 108 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-11-29 04:02:29,981 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 72 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:02:29,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 56 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:02:29,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-29 04:02:30,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-11-29 04:02:30,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:02:30,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2023-11-29 04:02:30,010 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 61 [2023-11-29 04:02:30,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:02:30,010 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2023-11-29 04:02:30,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:02:30,010 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2023-11-29 04:02:30,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-29 04:02:30,010 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:02:30,010 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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 04:02:30,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 04:02:30,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 04:02:30,211 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:02:30,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:02:30,211 INFO L85 PathProgramCache]: Analyzing trace with hash 466932294, now seen corresponding path program 9 times [2023-11-29 04:02:30,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:02:30,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905823120] [2023-11-29 04:02:30,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:02:30,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:02:30,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:02:37,153 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 2 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:02:37,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:02:37,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905823120] [2023-11-29 04:02:37,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905823120] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:02:37,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866886913] [2023-11-29 04:02:37,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:02:37,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:02:37,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:02:37,154 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:02:37,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 04:02:37,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 04:02:37,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:02:37,250 WARN L260 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 193 conjunts are in the unsatisfiable core [2023-11-29 04:02:37,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:02:37,334 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 19 treesize of output 1 [2023-11-29 04:02:45,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:02:45,578 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 04:02:45,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-11-29 04:02:45,879 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 2 proven. 107 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:02:45,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:02:58,208 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 04:02:58,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866886913] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:02:58,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:02:58,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 67, 65] total 184 [2023-11-29 04:02:58,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612369439] [2023-11-29 04:02:58,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:02:58,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 184 states [2023-11-29 04:02:58,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:02:58,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2023-11-29 04:02:58,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1192, Invalid=32480, Unknown=0, NotChecked=0, Total=33672 [2023-11-29 04:02:58,218 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 184 states, 184 states have (on average 1.0869565217391304) internal successors, (200), 184 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:04:34,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:04:34,955 INFO L93 Difference]: Finished difference Result 381 states and 448 transitions. [2023-11-29 04:04:34,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2023-11-29 04:04:34,956 INFO L78 Accepts]: Start accepts. Automaton has has 184 states, 184 states have (on average 1.0869565217391304) internal successors, (200), 184 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2023-11-29 04:04:34,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:04:34,958 INFO L225 Difference]: With dead ends: 381 [2023-11-29 04:04:34,958 INFO L226 Difference]: Without dead ends: 284 [2023-11-29 04:04:34,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 369 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33140 ImplicationChecksByTransitivity, 88.0s TimeCoverageRelationStatistics Valid=7474, Invalid=129796, Unknown=0, NotChecked=0, Total=137270 [2023-11-29 04:04:34,967 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1300 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 14399 mSolverCounterSat, 4061 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1300 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 18460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4061 IncrementalHoareTripleChecker+Valid, 14399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:04:34,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1300 Valid, 1088 Invalid, 18460 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4061 Valid, 14399 Invalid, 0 Unknown, 0 Unchecked, 30.1s Time] [2023-11-29 04:04:34,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2023-11-29 04:04:35,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 214. [2023-11-29 04:04:35,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.1455399061032865) internal successors, (244), 213 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:04:35,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 244 transitions. [2023-11-29 04:04:35,101 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 244 transitions. Word has length 70 [2023-11-29 04:04:35,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:04:35,101 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 244 transitions. [2023-11-29 04:04:35,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 184 states, 184 states have (on average 1.0869565217391304) internal successors, (200), 184 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:04:35,102 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 244 transitions. [2023-11-29 04:04:35,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-29 04:04:35,102 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:04:35,102 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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 04:04:35,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 04:04:35,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:04:35,303 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:04:35,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:04:35,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1621157831, now seen corresponding path program 10 times [2023-11-29 04:04:35,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:04:35,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885923794] [2023-11-29 04:04:35,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:04:35,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:04:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:04:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-29 04:04:35,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:04:35,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885923794] [2023-11-29 04:04:35,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885923794] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:04:35,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342983449] [2023-11-29 04:04:35,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:04:35,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:04:35,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:04:35,450 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:04:35,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 04:04:35,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:04:35,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:04:35,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 04:04:35,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:04:35,762 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-29 04:04:35,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:04:35,908 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-29 04:04:35,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342983449] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:04:35,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:04:35,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2023-11-29 04:04:35,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281969573] [2023-11-29 04:04:35,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:04:35,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 04:04:35,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:04:35,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 04:04:35,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2023-11-29 04:04:35,911 INFO L87 Difference]: Start difference. First operand 214 states and 244 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:04:36,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:04:36,554 INFO L93 Difference]: Finished difference Result 362 states and 418 transitions. [2023-11-29 04:04:36,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 04:04:36,555 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-11-29 04:04:36,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:04:36,556 INFO L225 Difference]: With dead ends: 362 [2023-11-29 04:04:36,556 INFO L226 Difference]: Without dead ends: 124 [2023-11-29 04:04:36,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 122 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2023-11-29 04:04:36,557 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 100 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:04:36,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 66 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 04:04:36,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-29 04:04:36,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 105. [2023-11-29 04:04:36,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1442307692307692) internal successors, (119), 104 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:04:36,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 119 transitions. [2023-11-29 04:04:36,620 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 119 transitions. Word has length 71 [2023-11-29 04:04:36,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:04:36,620 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 119 transitions. [2023-11-29 04:04:36,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:04:36,620 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 119 transitions. [2023-11-29 04:04:36,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-29 04:04:36,621 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:04:36,621 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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 04:04:36,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 04:04:36,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:04:36,821 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:04:36,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:04:36,822 INFO L85 PathProgramCache]: Analyzing trace with hash -855263067, now seen corresponding path program 11 times [2023-11-29 04:04:36,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:04:36,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537981200] [2023-11-29 04:04:36,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:04:36,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:04:36,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:04:36,976 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-11-29 04:04:36,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:04:36,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537981200] [2023-11-29 04:04:36,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537981200] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:04:36,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237519518] [2023-11-29 04:04:36,977 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:04:36,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:04:36,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:04:36,978 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:04:36,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 04:04:37,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 04:04:37,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:04:37,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 04:04:37,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:04:37,284 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-11-29 04:04:37,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:04:37,392 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-11-29 04:04:37,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237519518] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:04:37,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:04:37,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2023-11-29 04:04:37,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974096008] [2023-11-29 04:04:37,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:04:37,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 04:04:37,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:04:37,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 04:04:37,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2023-11-29 04:04:37,393 INFO L87 Difference]: Start difference. First operand 105 states and 119 transitions. Second operand has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:04:37,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:04:37,822 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2023-11-29 04:04:37,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 04:04:37,822 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2023-11-29 04:04:37,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:04:37,823 INFO L225 Difference]: With dead ends: 110 [2023-11-29 04:04:37,823 INFO L226 Difference]: Without dead ends: 82 [2023-11-29 04:04:37,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 136 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2023-11-29 04:04:37,824 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:04:37,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 77 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:04:37,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-29 04:04:37,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2023-11-29 04:04:37,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 81 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:04:37,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2023-11-29 04:04:37,888 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 76 [2023-11-29 04:04:37,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:04:37,888 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2023-11-29 04:04:37,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:04:37,889 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2023-11-29 04:04:37,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-29 04:04:37,889 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:04:37,889 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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 04:04:37,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 04:04:38,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:04:38,090 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:04:38,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:04:38,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1937881194, now seen corresponding path program 12 times [2023-11-29 04:04:38,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:04:38,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814346613] [2023-11-29 04:04:38,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:04:38,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:04:38,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:04:51,302 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 7 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:04:51,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:04:51,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814346613] [2023-11-29 04:04:51,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814346613] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:04:51,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190367531] [2023-11-29 04:04:51,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:04:51,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:04:51,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:04:51,304 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:04:51,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 04:04:51,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 04:04:51,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:04:51,432 WARN L260 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 234 conjunts are in the unsatisfiable core [2023-11-29 04:04:51,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:04:51,534 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 19 treesize of output 1 [2023-11-29 04:05:06,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:05:06,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:05:06,906 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 04:05:06,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:05:06,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:05:06,912 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 04:05:06,946 INFO L349 Elim1Store]: treesize reduction 18, result has 64.7 percent of original size [2023-11-29 04:05:06,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 46 treesize of output 43 [2023-11-29 04:05:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 2 proven. 162 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:05:07,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:06:34,843 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 69 treesize of output 61 [2023-11-29 04:06:34,875 INFO L349 Elim1Store]: treesize reduction 24, result has 27.3 percent of original size [2023-11-29 04:06:34,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 438 treesize of output 278 [2023-11-29 04:06:34,902 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 04:06:34,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190367531] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:06:34,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:06:34,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 76, 73] total 211 [2023-11-29 04:06:34,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097168479] [2023-11-29 04:06:34,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:06:34,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 211 states [2023-11-29 04:06:34,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:06:34,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 211 interpolants. [2023-11-29 04:06:34,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1541, Invalid=42751, Unknown=18, NotChecked=0, Total=44310 [2023-11-29 04:06:34,907 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand has 211 states, 211 states have (on average 1.09478672985782) internal successors, (231), 211 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:10,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:09:10,503 INFO L93 Difference]: Finished difference Result 290 states and 331 transitions. [2023-11-29 04:09:10,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2023-11-29 04:09:10,504 INFO L78 Accepts]: Start accepts. Automaton has has 211 states, 211 states have (on average 1.09478672985782) internal successors, (231), 211 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2023-11-29 04:09:10,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:09:10,505 INFO L225 Difference]: With dead ends: 290 [2023-11-29 04:09:10,505 INFO L226 Difference]: Without dead ends: 105 [2023-11-29 04:09:10,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 306 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19809 ImplicationChecksByTransitivity, 184.6s TimeCoverageRelationStatistics Valid=5098, Invalid=89436, Unknown=22, NotChecked=0, Total=94556 [2023-11-29 04:09:10,514 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1143 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 16104 mSolverCounterSat, 3357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1143 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 19461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3357 IncrementalHoareTripleChecker+Valid, 16104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:09:10,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1143 Valid, 722 Invalid, 19461 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3357 Valid, 16104 Invalid, 0 Unknown, 0 Unchecked, 75.0s Time] [2023-11-29 04:09:10,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-29 04:09:10,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2023-11-29 04:09:10,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.1414141414141414) internal successors, (113), 99 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:10,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2023-11-29 04:09:10,597 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 81 [2023-11-29 04:09:10,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:09:10,597 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2023-11-29 04:09:10,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 211 states, 211 states have (on average 1.09478672985782) internal successors, (231), 211 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:10,597 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2023-11-29 04:09:10,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-29 04:09:10,597 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:09:10,598 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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 04:09:10,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 04:09:10,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:09:10,800 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:09:10,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:10,801 INFO L85 PathProgramCache]: Analyzing trace with hash -454297184, now seen corresponding path program 13 times [2023-11-29 04:09:10,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:10,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597744265] [2023-11-29 04:09:10,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:10,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:10,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:11,083 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-11-29 04:09:11,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:11,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597744265] [2023-11-29 04:09:11,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597744265] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:09:11,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401657711] [2023-11-29 04:09:11,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:09:11,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:09:11,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:09:11,085 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:09:11,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 04:09:11,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:11,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 04:09:11,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:09:11,273 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-11-29 04:09:11,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:09:11,375 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-11-29 04:09:11,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401657711] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:09:11,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:09:11,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-11-29 04:09:11,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505056102] [2023-11-29 04:09:11,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:09:11,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 04:09:11,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:11,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 04:09:11,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2023-11-29 04:09:11,377 INFO L87 Difference]: Start difference. First operand 100 states and 113 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:11,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:09:11,675 INFO L93 Difference]: Finished difference Result 170 states and 200 transitions. [2023-11-29 04:09:11,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 04:09:11,676 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2023-11-29 04:09:11,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:09:11,677 INFO L225 Difference]: With dead ends: 170 [2023-11-29 04:09:11,677 INFO L226 Difference]: Without dead ends: 93 [2023-11-29 04:09:11,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 146 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2023-11-29 04:09:11,678 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:09:11,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 53 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:09:11,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-29 04:09:11,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2023-11-29 04:09:11,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.1195652173913044) internal successors, (103), 92 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:11,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2023-11-29 04:09:11,766 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 83 [2023-11-29 04:09:11,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:09:11,766 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2023-11-29 04:09:11,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:09:11,767 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2023-11-29 04:09:11,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-29 04:09:11,767 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:09:11,767 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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 04:09:11,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 04:09:11,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 04:09:11,969 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:09:11,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:09:11,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1908701114, now seen corresponding path program 14 times [2023-11-29 04:09:11,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:09:11,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933220903] [2023-11-29 04:09:11,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:09:11,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:09:13,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:09:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 13 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:27,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:09:27,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933220903] [2023-11-29 04:09:27,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933220903] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:09:27,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953522749] [2023-11-29 04:09:27,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:09:27,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:09:27,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:09:27,351 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:09:27,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 04:09:27,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:09:27,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:09:27,474 WARN L260 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 264 conjunts are in the unsatisfiable core [2023-11-29 04:09:27,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:09:27,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:09:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:09:36,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:09:55,477 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 04:09:55,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953522749] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:09:55,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:09:55,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 72, 69] total 200 [2023-11-29 04:09:55,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615651245] [2023-11-29 04:09:55,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:09:55,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 200 states [2023-11-29 04:09:55,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:09:55,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2023-11-29 04:09:55,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=39098, Unknown=0, NotChecked=0, Total=39800 [2023-11-29 04:09:55,481 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand has 200 states, 200 states have (on average 1.235) internal successors, (247), 200 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:41,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:10:41,626 INFO L93 Difference]: Finished difference Result 304 states and 344 transitions. [2023-11-29 04:10:41,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2023-11-29 04:10:41,627 INFO L78 Accepts]: Start accepts. Automaton has has 200 states, 200 states have (on average 1.235) internal successors, (247), 200 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2023-11-29 04:10:41,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:10:41,629 INFO L225 Difference]: With dead ends: 304 [2023-11-29 04:10:41,629 INFO L226 Difference]: Without dead ends: 298 [2023-11-29 04:10:41,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22773 ImplicationChecksByTransitivity, 60.0s TimeCoverageRelationStatistics Valid=2827, Invalid=91115, Unknown=0, NotChecked=0, Total=93942 [2023-11-29 04:10:41,632 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 378 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 21330 mSolverCounterSat, 1373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 22703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1373 IncrementalHoareTripleChecker+Valid, 21330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:10:41,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 841 Invalid, 22703 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1373 Valid, 21330 Invalid, 0 Unknown, 0 Unchecked, 17.4s Time] [2023-11-29 04:10:41,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-11-29 04:10:41,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 178. [2023-11-29 04:10:41,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.1355932203389831) internal successors, (201), 177 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:41,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 201 transitions. [2023-11-29 04:10:41,825 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 201 transitions. Word has length 92 [2023-11-29 04:10:41,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:10:41,825 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 201 transitions. [2023-11-29 04:10:41,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 200 states, 200 states have (on average 1.235) internal successors, (247), 200 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:41,826 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 201 transitions. [2023-11-29 04:10:41,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-29 04:10:41,826 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:10:41,826 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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 04:10:41,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-29 04:10:42,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 04:10:42,027 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:10:42,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:10:42,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1579698112, now seen corresponding path program 15 times [2023-11-29 04:10:42,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:10:42,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170014395] [2023-11-29 04:10:42,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:10:42,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:10:42,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:10:42,259 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2023-11-29 04:10:42,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:10:42,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170014395] [2023-11-29 04:10:42,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170014395] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:10:42,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665567445] [2023-11-29 04:10:42,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:10:42,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:10:42,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:10:42,260 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:10:42,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 04:10:42,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 04:10:42,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:10:42,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 04:10:42,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:10:42,591 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2023-11-29 04:10:42,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:10:42,736 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2023-11-29 04:10:42,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665567445] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:10:42,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:10:42,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-11-29 04:10:42,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356165069] [2023-11-29 04:10:42,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:10:42,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 04:10:42,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:10:42,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 04:10:42,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2023-11-29 04:10:42,739 INFO L87 Difference]: Start difference. First operand 178 states and 201 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:43,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:10:43,512 INFO L93 Difference]: Finished difference Result 338 states and 380 transitions. [2023-11-29 04:10:43,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 04:10:43,513 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2023-11-29 04:10:43,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:10:43,514 INFO L225 Difference]: With dead ends: 338 [2023-11-29 04:10:43,514 INFO L226 Difference]: Without dead ends: 129 [2023-11-29 04:10:43,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 164 SyntacticMatches, 13 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2023-11-29 04:10:43,515 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:10:43,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 86 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 04:10:43,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-29 04:10:43,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-11-29 04:10:43,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.125) internal successors, (144), 128 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:43,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 144 transitions. [2023-11-29 04:10:43,651 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 144 transitions. Word has length 93 [2023-11-29 04:10:43,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:10:43,651 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 144 transitions. [2023-11-29 04:10:43,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:43,651 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 144 transitions. [2023-11-29 04:10:43,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-29 04:10:43,652 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:10:43,652 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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 04:10:43,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 04:10:43,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 04:10:43,852 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:10:43,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:10:43,853 INFO L85 PathProgramCache]: Analyzing trace with hash -223703231, now seen corresponding path program 16 times [2023-11-29 04:10:43,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:10:43,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816776655] [2023-11-29 04:10:43,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:10:43,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:10:43,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:10:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-11-29 04:10:44,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:10:44,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816776655] [2023-11-29 04:10:44,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816776655] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:10:44,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665960096] [2023-11-29 04:10:44,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:10:44,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:10:44,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:10:44,091 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:10:44,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 04:10:44,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:10:44,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:10:44,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 04:10:44,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:10:44,449 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-11-29 04:10:44,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:10:44,697 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-11-29 04:10:44,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665960096] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:10:44,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:10:44,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2023-11-29 04:10:44,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483397125] [2023-11-29 04:10:44,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:10:44,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 04:10:44,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:10:44,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 04:10:44,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1265, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 04:10:44,699 INFO L87 Difference]: Start difference. First operand 129 states and 144 transitions. Second operand has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:45,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:10:45,301 INFO L93 Difference]: Finished difference Result 215 states and 248 transitions. [2023-11-29 04:10:45,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 04:10:45,302 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2023-11-29 04:10:45,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:10:45,302 INFO L225 Difference]: With dead ends: 215 [2023-11-29 04:10:45,302 INFO L226 Difference]: Without dead ends: 104 [2023-11-29 04:10:45,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 158 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=317, Invalid=1845, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 04:10:45,303 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 101 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:10:45,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 99 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:10:45,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-29 04:10:45,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2023-11-29 04:10:45,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.1067961165048543) internal successors, (114), 103 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:45,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2023-11-29 04:10:45,417 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 94 [2023-11-29 04:10:45,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:10:45,417 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2023-11-29 04:10:45,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:10:45,417 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2023-11-29 04:10:45,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-29 04:10:45,417 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:10:45,417 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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 04:10:45,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 04:10:45,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:10:45,618 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:10:45,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:10:45,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1251255574, now seen corresponding path program 17 times [2023-11-29 04:10:45,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:10:45,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620905652] [2023-11-29 04:10:45,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:10:45,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:10:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:11:04,877 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 45 proven. 263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:04,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:11:04,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620905652] [2023-11-29 04:11:04,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620905652] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:11:04,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850186385] [2023-11-29 04:11:04,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:11:04,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:11:04,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:11:04,879 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:11:04,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 04:11:05,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-29 04:11:05,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:11:05,182 WARN L260 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 312 conjunts are in the unsatisfiable core [2023-11-29 04:11:05,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:11:05,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:11:05,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:11:05,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:11:05,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:11:12,020 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:11:12,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:11:37,902 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 04:11:37,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850186385] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:11:37,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:11:37,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 83, 79] total 207 [2023-11-29 04:11:37,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751616880] [2023-11-29 04:11:37,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:11:37,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 207 states [2023-11-29 04:11:37,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:11:37,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 207 interpolants. [2023-11-29 04:11:37,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=719, Invalid=41923, Unknown=0, NotChecked=0, Total=42642 [2023-11-29 04:11:37,906 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 207 states, 207 states have (on average 1.2222222222222223) internal successors, (253), 207 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:25,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:12:25,335 INFO L93 Difference]: Finished difference Result 231 states and 258 transitions. [2023-11-29 04:12:25,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-11-29 04:12:25,336 INFO L78 Accepts]: Start accepts. Automaton has has 207 states, 207 states have (on average 1.2222222222222223) internal successors, (253), 207 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2023-11-29 04:12:25,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:12:25,337 INFO L225 Difference]: With dead ends: 231 [2023-11-29 04:12:25,337 INFO L226 Difference]: Without dead ends: 227 [2023-11-29 04:12:25,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19546 ImplicationChecksByTransitivity, 64.4s TimeCoverageRelationStatistics Valid=2613, Invalid=84117, Unknown=0, NotChecked=0, Total=86730 [2023-11-29 04:12:25,340 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 258 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 24526 mSolverCounterSat, 936 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 25462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 936 IncrementalHoareTripleChecker+Valid, 24526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.9s IncrementalHoareTripleChecker+Time [2023-11-29 04:12:25,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 945 Invalid, 25462 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [936 Valid, 24526 Invalid, 0 Unknown, 0 Unchecked, 19.9s Time] [2023-11-29 04:12:25,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-11-29 04:12:25,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 143. [2023-11-29 04:12:25,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.1126760563380282) internal successors, (158), 142 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:25,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 158 transitions. [2023-11-29 04:12:25,515 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 158 transitions. Word has length 103 [2023-11-29 04:12:25,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:12:25,515 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 158 transitions. [2023-11-29 04:12:25,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 207 states, 207 states have (on average 1.2222222222222223) internal successors, (253), 207 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:25,515 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 158 transitions. [2023-11-29 04:12:25,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-29 04:12:25,516 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:12:25,516 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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 04:12:25,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 04:12:25,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:12:25,716 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:12:25,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:12:25,717 INFO L85 PathProgramCache]: Analyzing trace with hash 2019441786, now seen corresponding path program 18 times [2023-11-29 04:12:25,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:12:25,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441118697] [2023-11-29 04:12:25,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:12:25,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:12:25,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:12:25,993 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-11-29 04:12:25,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:12:25,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441118697] [2023-11-29 04:12:25,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441118697] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:12:25,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173331826] [2023-11-29 04:12:25,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:12:25,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:12:25,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:12:25,995 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:12:25,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 04:12:26,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-29 04:12:26,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:12:26,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 04:12:26,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:12:26,352 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-11-29 04:12:26,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:12:26,515 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-11-29 04:12:26,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173331826] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:12:26,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:12:26,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-11-29 04:12:26,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900658903] [2023-11-29 04:12:26,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:12:26,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 04:12:26,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:12:26,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 04:12:26,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2023-11-29 04:12:26,516 INFO L87 Difference]: Start difference. First operand 143 states and 158 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:27,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:12:27,321 INFO L93 Difference]: Finished difference Result 359 states and 398 transitions. [2023-11-29 04:12:27,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 04:12:27,321 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2023-11-29 04:12:27,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:12:27,322 INFO L225 Difference]: With dead ends: 359 [2023-11-29 04:12:27,322 INFO L226 Difference]: Without dead ends: 144 [2023-11-29 04:12:27,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 183 SyntacticMatches, 15 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2023-11-29 04:12:27,323 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 47 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:12:27,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 66 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:12:27,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-11-29 04:12:27,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2023-11-29 04:12:27,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.1118881118881119) internal successors, (159), 143 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:27,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 159 transitions. [2023-11-29 04:12:27,506 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 159 transitions. Word has length 104 [2023-11-29 04:12:27,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:12:27,506 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 159 transitions. [2023-11-29 04:12:27,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:27,506 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 159 transitions. [2023-11-29 04:12:27,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-29 04:12:27,507 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:12:27,507 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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 04:12:27,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 04:12:27,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:12:27,708 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:12:27,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:12:27,708 INFO L85 PathProgramCache]: Analyzing trace with hash 165718745, now seen corresponding path program 19 times [2023-11-29 04:12:27,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:12:27,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593584397] [2023-11-29 04:12:27,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:12:27,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:12:27,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:12:28,027 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2023-11-29 04:12:28,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:12:28,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593584397] [2023-11-29 04:12:28,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593584397] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:12:28,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383357542] [2023-11-29 04:12:28,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:12:28,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:12:28,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:12:28,028 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:12:28,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 04:12:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:12:28,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 04:12:28,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:12:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2023-11-29 04:12:28,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:12:28,458 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2023-11-29 04:12:28,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383357542] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:12:28,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:12:28,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-11-29 04:12:28,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749057599] [2023-11-29 04:12:28,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:12:28,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 04:12:28,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:12:28,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 04:12:28,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2023-11-29 04:12:28,460 INFO L87 Difference]: Start difference. First operand 144 states and 159 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:28,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:12:28,981 INFO L93 Difference]: Finished difference Result 239 states and 272 transitions. [2023-11-29 04:12:28,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 04:12:28,982 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2023-11-29 04:12:28,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:12:28,983 INFO L225 Difference]: With dead ends: 239 [2023-11-29 04:12:28,983 INFO L226 Difference]: Without dead ends: 115 [2023-11-29 04:12:28,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 184 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2023-11-29 04:12:28,983 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:12:28,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 71 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:12:28,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-29 04:12:29,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2023-11-29 04:12:29,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0964912280701755) internal successors, (125), 114 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:29,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2023-11-29 04:12:29,131 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 105 [2023-11-29 04:12:29,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:12:29,131 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2023-11-29 04:12:29,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:12:29,131 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2023-11-29 04:12:29,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-29 04:12:29,132 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:12:29,132 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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 04:12:29,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 04:12:29,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:12:29,333 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:12:29,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:12:29,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1758518854, now seen corresponding path program 20 times [2023-11-29 04:12:29,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:12:29,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705497269] [2023-11-29 04:12:29,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:12:29,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:12:29,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:12:54,167 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 57 proven. 339 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:12:54,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:12:54,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705497269] [2023-11-29 04:12:54,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705497269] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:12:54,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968256154] [2023-11-29 04:12:54,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:12:54,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:12:54,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:12:54,168 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:12:54,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 04:12:54,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:12:54,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:12:54,320 WARN L260 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 348 conjunts are in the unsatisfiable core [2023-11-29 04:12:54,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:12:54,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:13:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:13:03,860 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:13:39,605 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 04:13:39,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968256154] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:13:39,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:13:39,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 94, 89] total 236 [2023-11-29 04:13:39,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915615550] [2023-11-29 04:13:39,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:13:39,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 236 states [2023-11-29 04:13:39,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:13:39,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 236 interpolants. [2023-11-29 04:13:39,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=919, Invalid=54541, Unknown=0, NotChecked=0, Total=55460 [2023-11-29 04:13:39,610 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand has 236 states, 236 states have (on average 1.1991525423728813) internal successors, (283), 236 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:14:34,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:14:34,435 INFO L93 Difference]: Finished difference Result 335 states and 368 transitions. [2023-11-29 04:14:34,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2023-11-29 04:14:34,436 INFO L78 Accepts]: Start accepts. Automaton has has 236 states, 236 states have (on average 1.1991525423728813) internal successors, (283), 236 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2023-11-29 04:14:34,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:14:34,438 INFO L225 Difference]: With dead ends: 335 [2023-11-29 04:14:34,438 INFO L226 Difference]: Without dead ends: 329 [2023-11-29 04:14:34,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 320 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24043 ImplicationChecksByTransitivity, 79.0s TimeCoverageRelationStatistics Valid=2619, Invalid=100743, Unknown=0, NotChecked=0, Total=103362 [2023-11-29 04:14:34,444 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 178 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 30016 mSolverCounterSat, 1129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 31145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1129 IncrementalHoareTripleChecker+Valid, 30016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:14:34,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 601 Invalid, 31145 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1129 Valid, 30016 Invalid, 0 Unknown, 0 Unchecked, 26.4s Time] [2023-11-29 04:14:34,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-11-29 04:14:34,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 270. [2023-11-29 04:14:34,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.1078066914498141) internal successors, (298), 269 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:14:34,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 298 transitions. [2023-11-29 04:14:34,893 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 298 transitions. Word has length 114 [2023-11-29 04:14:34,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:14:34,893 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 298 transitions. [2023-11-29 04:14:34,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 236 states, 236 states have (on average 1.1991525423728813) internal successors, (283), 236 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:14:34,894 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 298 transitions. [2023-11-29 04:14:34,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-29 04:14:34,895 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:14:34,895 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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 04:14:34,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 04:14:35,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 04:14:35,096 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:14:35,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:14:35,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1140018816, now seen corresponding path program 21 times [2023-11-29 04:14:35,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:14:35,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974792784] [2023-11-29 04:14:35,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:14:35,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:14:35,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:14:35,486 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2023-11-29 04:14:35,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:14:35,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974792784] [2023-11-29 04:14:35,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974792784] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:14:35,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736325178] [2023-11-29 04:14:35,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:14:35,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:14:35,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:14:35,488 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:14:35,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 04:14:35,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-29 04:14:35,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:14:35,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 04:14:35,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:14:36,075 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2023-11-29 04:14:36,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:14:36,427 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2023-11-29 04:14:36,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736325178] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:14:36,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:14:36,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2023-11-29 04:14:36,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776883611] [2023-11-29 04:14:36,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:14:36,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-29 04:14:36,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:14:36,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-29 04:14:36,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=2029, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 04:14:36,429 INFO L87 Difference]: Start difference. First operand 270 states and 298 transitions. Second operand has 49 states, 49 states have (on average 2.183673469387755) internal successors, (107), 49 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:14:39,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:14:39,068 INFO L93 Difference]: Finished difference Result 483 states and 537 transitions. [2023-11-29 04:14:39,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-29 04:14:39,069 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.183673469387755) internal successors, (107), 49 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2023-11-29 04:14:39,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:14:39,070 INFO L225 Difference]: With dead ends: 483 [2023-11-29 04:14:39,071 INFO L226 Difference]: Without dead ends: 216 [2023-11-29 04:14:39,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 212 SyntacticMatches, 10 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=676, Invalid=4154, Unknown=0, NotChecked=0, Total=4830 [2023-11-29 04:14:39,072 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 143 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 2953 mSolverCounterSat, 559 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 3512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 559 IncrementalHoareTripleChecker+Valid, 2953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 04:14:39,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 148 Invalid, 3512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [559 Valid, 2953 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 04:14:39,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-11-29 04:14:39,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 197. [2023-11-29 04:14:39,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.096938775510204) internal successors, (215), 196 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:14:39,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 215 transitions. [2023-11-29 04:14:39,406 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 215 transitions. Word has length 115 [2023-11-29 04:14:39,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:14:39,406 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 215 transitions. [2023-11-29 04:14:39,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.183673469387755) internal successors, (107), 49 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:14:39,407 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 215 transitions. [2023-11-29 04:14:39,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-29 04:14:39,407 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:14:39,407 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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 04:14:39,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 04:14:39,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 04:14:39,608 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:14:39,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:14:39,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1403024376, now seen corresponding path program 22 times [2023-11-29 04:14:39,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:14:39,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428120756] [2023-11-29 04:14:39,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:14:39,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:14:39,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:14:39,982 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2023-11-29 04:14:39,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:14:39,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428120756] [2023-11-29 04:14:39,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428120756] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:14:39,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269528746] [2023-11-29 04:14:39,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:14:39,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:14:39,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:14:39,983 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:14:39,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 04:14:40,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:14:40,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:14:40,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 04:14:40,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:14:40,591 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2023-11-29 04:14:40,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:14:40,993 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2023-11-29 04:14:40,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269528746] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:14:40,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:14:40,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2023-11-29 04:14:40,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619276541] [2023-11-29 04:14:40,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:14:40,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-29 04:14:40,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:14:40,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-29 04:14:40,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=2021, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 04:14:40,995 INFO L87 Difference]: Start difference. First operand 197 states and 215 transitions. Second operand has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:14:41,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:14:41,831 INFO L93 Difference]: Finished difference Result 290 states and 316 transitions. [2023-11-29 04:14:41,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 04:14:41,831 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2023-11-29 04:14:41,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:14:41,832 INFO L225 Difference]: With dead ends: 290 [2023-11-29 04:14:41,832 INFO L226 Difference]: Without dead ends: 126 [2023-11-29 04:14:41,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 194 SyntacticMatches, 10 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=486, Invalid=2936, Unknown=0, NotChecked=0, Total=3422 [2023-11-29 04:14:41,834 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 140 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:14:41,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 90 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 04:14:41,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-29 04:14:42,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2023-11-29 04:14:42,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.088) internal successors, (136), 125 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:14:42,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 136 transitions. [2023-11-29 04:14:42,037 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 136 transitions. Word has length 116 [2023-11-29 04:14:42,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:14:42,037 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 136 transitions. [2023-11-29 04:14:42,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 49 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:14:42,037 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 136 transitions. [2023-11-29 04:14:42,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-29 04:14:42,038 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:14:42,038 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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 04:14:42,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-29 04:14:42,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 04:14:42,239 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:14:42,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:14:42,239 INFO L85 PathProgramCache]: Analyzing trace with hash -577297770, now seen corresponding path program 23 times [2023-11-29 04:14:42,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:14:42,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280795347] [2023-11-29 04:14:42,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:14:42,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:14:42,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:15:15,396 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 57 proven. 438 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:15:15,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:15:15,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280795347] [2023-11-29 04:15:15,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280795347] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:15:15,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672365283] [2023-11-29 04:15:15,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:15:15,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:15:15,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:15:15,398 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:15:15,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc8676-7c0d-4866-bf4e-1684ca2236b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 04:15:15,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-29 04:15:15,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:15:15,957 WARN L260 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 402 conjunts are in the unsatisfiable core [2023-11-29 04:15:15,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:15:15,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:15:15,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:15:16,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:15:16,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:15:16,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:15:16,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:15:16,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 04:15:30,870 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:15:30,870 INFO L327 TraceCheckSpWp]: Computing backward predicates...