./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.15.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.15.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eebc57bb84d5e49c07b21e35f27ee095cb699b6ae996e22651132239fcb21755 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:40:38,804 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:40:38,867 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 16:40:38,873 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:40:38,873 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:40:38,897 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:40:38,898 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:40:38,898 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:40:38,899 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:40:38,900 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:40:38,900 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:40:38,901 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:40:38,901 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:40:38,901 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 16:40:38,902 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:40:38,902 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:40:38,903 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 16:40:38,903 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 16:40:38,904 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:40:38,904 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 16:40:38,905 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 16:40:38,905 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 16:40:38,906 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:40:38,906 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 16:40:38,907 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 16:40:38,907 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:40:38,907 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 16:40:38,908 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:40:38,908 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 16:40:38,908 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:40:38,909 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 16:40:38,909 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 16:40:38,909 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 16:40:38,909 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:40:38,910 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:40:38,910 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:40:38,910 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:40:38,910 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:40:38,911 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:40:38,911 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:40:38,911 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 16:40:38,911 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 16:40:38,911 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 16:40:38,912 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:40:38,912 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 16:40:38,912 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:40:38,912 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:40:38,912 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eebc57bb84d5e49c07b21e35f27ee095cb699b6ae996e22651132239fcb21755 [2023-12-02 16:40:39,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:40:39,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:40:39,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:40:39,191 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:40:39,191 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:40:39,193 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.15.cil.c [2023-12-02 16:40:41,941 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:40:42,573 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:40:42,574 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/sv-benchmarks/c/combinations/Problem05_label43+token_ring.15.cil.c [2023-12-02 16:40:42,626 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/data/142f2a6c6/845459bfc6b6485197eedb5026469f8e/FLAG83e314eaf [2023-12-02 16:40:42,640 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/data/142f2a6c6/845459bfc6b6485197eedb5026469f8e [2023-12-02 16:40:42,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:40:42,644 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:40:42,645 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:40:42,645 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:40:42,650 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:40:42,651 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:40:42" (1/1) ... [2023-12-02 16:40:42,652 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32d77a03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:42, skipping insertion in model container [2023-12-02 16:40:42,652 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:40:42" (1/1) ... [2023-12-02 16:40:42,921 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:40:44,674 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_beb839b3-ea22-43a6-96a3-8bd6ad430acd/sv-benchmarks/c/combinations/Problem05_label43+token_ring.15.cil.c[381679,381692] [2023-12-02 16:40:44,695 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_beb839b3-ea22-43a6-96a3-8bd6ad430acd/sv-benchmarks/c/combinations/Problem05_label43+token_ring.15.cil.c[383339,383352] [2023-12-02 16:40:45,007 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:40:45,017 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:40:45,942 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_beb839b3-ea22-43a6-96a3-8bd6ad430acd/sv-benchmarks/c/combinations/Problem05_label43+token_ring.15.cil.c[381679,381692] [2023-12-02 16:40:45,945 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_beb839b3-ea22-43a6-96a3-8bd6ad430acd/sv-benchmarks/c/combinations/Problem05_label43+token_ring.15.cil.c[383339,383352] [2023-12-02 16:40:45,972 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:40:46,037 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:40:46,038 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:46 WrapperNode [2023-12-02 16:40:46,038 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:40:46,039 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:40:46,039 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:40:46,039 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:40:46,045 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:46" (1/1) ... [2023-12-02 16:40:46,153 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:46" (1/1) ... [2023-12-02 16:40:46,381 INFO L138 Inliner]: procedures = 70, calls = 81, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 13292 [2023-12-02 16:40:46,382 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:40:46,382 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:40:46,382 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:40:46,382 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:40:46,453 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:46" (1/1) ... [2023-12-02 16:40:46,453 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:46" (1/1) ... [2023-12-02 16:40:46,521 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:46" (1/1) ... [2023-12-02 16:40:46,521 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:46" (1/1) ... [2023-12-02 16:40:46,663 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:46" (1/1) ... [2023-12-02 16:40:46,727 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:46" (1/1) ... [2023-12-02 16:40:46,752 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:46" (1/1) ... [2023-12-02 16:40:46,768 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:46" (1/1) ... [2023-12-02 16:40:46,825 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:40:46,826 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:40:46,826 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:40:46,826 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:40:46,826 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:46" (1/1) ... [2023-12-02 16:40:46,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:40:46,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:40:46,850 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:40:46,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:40:46,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:40:46,884 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-12-02 16:40:46,884 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-12-02 16:40:46,885 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 16:40:46,885 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 16:40:46,885 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-12-02 16:40:46,885 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-12-02 16:40:46,885 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-12-02 16:40:46,885 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-12-02 16:40:46,886 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-12-02 16:40:46,886 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-12-02 16:40:46,886 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-12-02 16:40:46,886 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-12-02 16:40:46,886 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-12-02 16:40:46,886 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-12-02 16:40:46,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 16:40:46,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:40:46,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:40:47,029 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:40:47,031 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:40:54,489 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:40:56,427 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:40:56,427 INFO L309 CfgBuilder]: Removed 17 assume(true) statements. [2023-12-02 16:40:56,430 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:40:56 BoogieIcfgContainer [2023-12-02 16:40:56,430 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:40:56,433 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:40:56,433 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:40:56,436 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:40:56,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:40:42" (1/3) ... [2023-12-02 16:40:56,437 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e6daa63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:40:56, skipping insertion in model container [2023-12-02 16:40:56,437 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:40:46" (2/3) ... [2023-12-02 16:40:56,437 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e6daa63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:40:56, skipping insertion in model container [2023-12-02 16:40:56,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:40:56" (3/3) ... [2023-12-02 16:40:56,439 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.15.cil.c [2023-12-02 16:40:56,454 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:40:56,454 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 16:40:56,528 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:40:56,533 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=FINITE_AUTOMATA, 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;@17b3b64e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:40:56,534 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 16:40:56,544 INFO L276 IsEmpty]: Start isEmpty. Operand has 1862 states, 1823 states have (on average 1.9467910038398244) internal successors, (3549), 1828 states have internal predecessors, (3549), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2023-12-02 16:40:56,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-02 16:40:56,556 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:56,557 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, 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] [2023-12-02 16:40:56,557 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:40:56,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:40:56,562 INFO L85 PathProgramCache]: Analyzing trace with hash -2082892800, now seen corresponding path program 1 times [2023-12-02 16:40:56,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:40:56,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584278055] [2023-12-02 16:40:56,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:56,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:40:56,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:57,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:40:57,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:40:57,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584278055] [2023-12-02 16:40:57,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584278055] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:40:57,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:40:57,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:40:57,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099275327] [2023-12-02 16:40:57,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:40:57,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:40:57,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:40:57,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:40:57,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:40:57,115 INFO L87 Difference]: Start difference. First operand has 1862 states, 1823 states have (on average 1.9467910038398244) internal successors, (3549), 1828 states have internal predecessors, (3549), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:40:58,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:40:58,150 INFO L93 Difference]: Finished difference Result 3919 states and 7545 transitions. [2023-12-02 16:40:58,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:40:58,153 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2023-12-02 16:40:58,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:40:58,181 INFO L225 Difference]: With dead ends: 3919 [2023-12-02 16:40:58,181 INFO L226 Difference]: Without dead ends: 2056 [2023-12-02 16:40:58,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:40:58,195 INFO L413 NwaCegarLoop]: 3577 mSDtfsCounter, 3848 mSDsluCounter, 3473 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3848 SdHoareTripleChecker+Valid, 7050 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 16:40:58,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3848 Valid, 7050 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 16:40:58,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2056 states. [2023-12-02 16:40:58,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2056 to 2055. [2023-12-02 16:40:58,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 1989 states have (on average 1.903469079939668) internal successors, (3786), 1993 states have internal predecessors, (3786), 52 states have call successors, (52), 13 states have call predecessors, (52), 12 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2023-12-02 16:40:58,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 3888 transitions. [2023-12-02 16:40:58,358 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 3888 transitions. Word has length 71 [2023-12-02 16:40:58,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:40:58,359 INFO L495 AbstractCegarLoop]: Abstraction has 2055 states and 3888 transitions. [2023-12-02 16:40:58,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:40:58,360 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 3888 transitions. [2023-12-02 16:40:58,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-12-02 16:40:58,372 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:58,372 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:40:58,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 16:40:58,373 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:40:58,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:40:58,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1641347466, now seen corresponding path program 1 times [2023-12-02 16:40:58,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:40:58,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797185963] [2023-12-02 16:40:58,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:58,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:40:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:58,732 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 16:40:58,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:40:58,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797185963] [2023-12-02 16:40:58,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797185963] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:40:58,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120517464] [2023-12-02 16:40:58,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:40:58,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:40:58,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:40:58,735 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:40:58,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 16:40:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:40:59,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 16:40:59,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:40:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 16:40:59,165 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:40:59,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120517464] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:40:59,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:40:59,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 16:40:59,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935191693] [2023-12-02 16:40:59,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:40:59,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:40:59,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:40:59,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:40:59,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:40:59,170 INFO L87 Difference]: Start difference. First operand 2055 states and 3888 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:40:59,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:40:59,727 INFO L93 Difference]: Finished difference Result 2866 states and 5133 transitions. [2023-12-02 16:40:59,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:40:59,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2023-12-02 16:40:59,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:40:59,744 INFO L225 Difference]: With dead ends: 2866 [2023-12-02 16:40:59,744 INFO L226 Difference]: Without dead ends: 2457 [2023-12-02 16:40:59,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:40:59,748 INFO L413 NwaCegarLoop]: 3389 mSDtfsCounter, 3547 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3547 SdHoareTripleChecker+Valid, 3651 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:40:59,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3547 Valid, 3651 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:40:59,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2023-12-02 16:40:59,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2451. [2023-12-02 16:40:59,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2451 states, 2329 states have (on average 1.841562902533276) internal successors, (4289), 2334 states have internal predecessors, (4289), 96 states have call successors, (96), 25 states have call predecessors, (96), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2023-12-02 16:40:59,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2451 states to 2451 states and 4479 transitions. [2023-12-02 16:40:59,826 INFO L78 Accepts]: Start accepts. Automaton has 2451 states and 4479 transitions. Word has length 145 [2023-12-02 16:40:59,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:40:59,827 INFO L495 AbstractCegarLoop]: Abstraction has 2451 states and 4479 transitions. [2023-12-02 16:40:59,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:40:59,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2451 states and 4479 transitions. [2023-12-02 16:40:59,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-12-02 16:40:59,832 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:40:59,833 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:40:59,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 16:41:00,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:41:00,034 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:41:00,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:41:00,035 INFO L85 PathProgramCache]: Analyzing trace with hash 2131239416, now seen corresponding path program 1 times [2023-12-02 16:41:00,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:41:00,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130275480] [2023-12-02 16:41:00,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:41:00,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:41:00,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:41:00,259 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 16:41:00,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:41:00,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130275480] [2023-12-02 16:41:00,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130275480] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:41:00,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046586446] [2023-12-02 16:41:00,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:41:00,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:41:00,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:41:00,261 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:41:00,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 16:41:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:41:00,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 1108 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 16:41:00,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:41:00,574 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 16:41:00,574 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:41:00,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046586446] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:41:00,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:41:00,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 16:41:00,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576279327] [2023-12-02 16:41:00,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:41:00,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:41:00,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:41:00,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:41:00,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:41:00,577 INFO L87 Difference]: Start difference. First operand 2451 states and 4479 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:41:01,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:41:01,133 INFO L93 Difference]: Finished difference Result 4048 states and 6926 transitions. [2023-12-02 16:41:01,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:41:01,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2023-12-02 16:41:01,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:41:01,150 INFO L225 Difference]: With dead ends: 4048 [2023-12-02 16:41:01,150 INFO L226 Difference]: Without dead ends: 3243 [2023-12-02 16:41:01,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:41:01,155 INFO L413 NwaCegarLoop]: 3369 mSDtfsCounter, 3565 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3565 SdHoareTripleChecker+Valid, 3631 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:41:01,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3565 Valid, 3631 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:41:01,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3243 states. [2023-12-02 16:41:01,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3243 to 3235. [2023-12-02 16:41:01,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3235 states, 3003 states have (on average 1.7592407592407593) internal successors, (5283), 3010 states have internal predecessors, (5283), 182 states have call successors, (182), 49 states have call predecessors, (182), 48 states have return successors, (180), 176 states have call predecessors, (180), 180 states have call successors, (180) [2023-12-02 16:41:01,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3235 states to 3235 states and 5645 transitions. [2023-12-02 16:41:01,265 INFO L78 Accepts]: Start accepts. Automaton has 3235 states and 5645 transitions. Word has length 145 [2023-12-02 16:41:01,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:41:01,266 INFO L495 AbstractCegarLoop]: Abstraction has 3235 states and 5645 transitions. [2023-12-02 16:41:01,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:41:01,266 INFO L276 IsEmpty]: Start isEmpty. Operand 3235 states and 5645 transitions. [2023-12-02 16:41:01,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-12-02 16:41:01,271 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:41:01,271 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:41:01,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 16:41:01,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:41:01,472 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:41:01,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:41:01,473 INFO L85 PathProgramCache]: Analyzing trace with hash 729424122, now seen corresponding path program 1 times [2023-12-02 16:41:01,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:41:01,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140531372] [2023-12-02 16:41:01,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:41:01,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:41:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:41:01,684 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 16:41:01,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:41:01,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140531372] [2023-12-02 16:41:01,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140531372] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:41:01,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291617252] [2023-12-02 16:41:01,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:41:01,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:41:01,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:41:01,690 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:41:01,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 16:41:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:41:02,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 1102 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 16:41:02,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:41:02,090 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 16:41:02,090 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:41:02,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291617252] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:41:02,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:41:02,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 16:41:02,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840301162] [2023-12-02 16:41:02,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:41:02,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:41:02,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:41:02,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:41:02,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:41:02,093 INFO L87 Difference]: Start difference. First operand 3235 states and 5645 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:41:02,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:41:02,659 INFO L93 Difference]: Finished difference Result 6388 states and 10462 transitions. [2023-12-02 16:41:02,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:41:02,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2023-12-02 16:41:02,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:41:02,691 INFO L225 Difference]: With dead ends: 6388 [2023-12-02 16:41:02,691 INFO L226 Difference]: Without dead ends: 4799 [2023-12-02 16:41:02,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:41:02,700 INFO L413 NwaCegarLoop]: 3344 mSDtfsCounter, 3559 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3559 SdHoareTripleChecker+Valid, 3606 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:41:02,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3559 Valid, 3606 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:41:02,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4799 states. [2023-12-02 16:41:02,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4799 to 4787. [2023-12-02 16:41:02,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4787 states, 4339 states have (on average 1.6702005070292694) internal successors, (7247), 4350 states have internal predecessors, (7247), 350 states have call successors, (350), 97 states have call predecessors, (350), 96 states have return successors, (348), 340 states have call predecessors, (348), 348 states have call successors, (348) [2023-12-02 16:41:02,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4787 states to 4787 states and 7945 transitions. [2023-12-02 16:41:02,904 INFO L78 Accepts]: Start accepts. Automaton has 4787 states and 7945 transitions. Word has length 145 [2023-12-02 16:41:02,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:41:02,905 INFO L495 AbstractCegarLoop]: Abstraction has 4787 states and 7945 transitions. [2023-12-02 16:41:02,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:41:02,905 INFO L276 IsEmpty]: Start isEmpty. Operand 4787 states and 7945 transitions. [2023-12-02 16:41:02,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-12-02 16:41:02,915 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:41:02,916 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:41:02,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 16:41:03,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:41:03,117 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:41:03,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:41:03,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1727002244, now seen corresponding path program 1 times [2023-12-02 16:41:03,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:41:03,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396881990] [2023-12-02 16:41:03,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:41:03,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:41:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:41:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 16:41:03,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:41:03,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396881990] [2023-12-02 16:41:03,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396881990] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:41:03,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482948966] [2023-12-02 16:41:03,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:41:03,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:41:03,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:41:03,332 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:41:03,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 16:41:03,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:41:03,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 16:41:03,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:41:03,632 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 16:41:03,633 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:41:03,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482948966] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:41:03,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:41:03,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 16:41:03,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655421728] [2023-12-02 16:41:03,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:41:03,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:41:03,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:41:03,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:41:03,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:41:03,636 INFO L87 Difference]: Start difference. First operand 4787 states and 7945 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:41:04,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:41:04,218 INFO L93 Difference]: Finished difference Result 11020 states and 17434 transitions. [2023-12-02 16:41:04,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:41:04,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2023-12-02 16:41:04,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:41:04,270 INFO L225 Difference]: With dead ends: 11020 [2023-12-02 16:41:04,271 INFO L226 Difference]: Without dead ends: 7879 [2023-12-02 16:41:04,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:41:04,288 INFO L413 NwaCegarLoop]: 3383 mSDtfsCounter, 3568 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3568 SdHoareTripleChecker+Valid, 3645 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:41:04,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3568 Valid, 3645 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:41:04,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7879 states. [2023-12-02 16:41:04,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7879 to 7859. [2023-12-02 16:41:04,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7859 states, 6987 states have (on average 1.5925289823958781) internal successors, (11127), 7006 states have internal predecessors, (11127), 678 states have call successors, (678), 193 states have call predecessors, (678), 192 states have return successors, (676), 660 states have call predecessors, (676), 676 states have call successors, (676) [2023-12-02 16:41:04,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7859 states to 7859 states and 12481 transitions. [2023-12-02 16:41:04,598 INFO L78 Accepts]: Start accepts. Automaton has 7859 states and 12481 transitions. Word has length 145 [2023-12-02 16:41:04,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:41:04,598 INFO L495 AbstractCegarLoop]: Abstraction has 7859 states and 12481 transitions. [2023-12-02 16:41:04,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:41:04,598 INFO L276 IsEmpty]: Start isEmpty. Operand 7859 states and 12481 transitions. [2023-12-02 16:41:04,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-12-02 16:41:04,615 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:41:04,616 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:41:04,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 16:41:04,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:41:04,818 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:41:04,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:41:04,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1055560506, now seen corresponding path program 1 times [2023-12-02 16:41:04,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:41:04,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139311876] [2023-12-02 16:41:04,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:41:04,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:41:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:41:05,016 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 16:41:05,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:41:05,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139311876] [2023-12-02 16:41:05,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139311876] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:41:05,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594865580] [2023-12-02 16:41:05,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:41:05,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:41:05,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:41:05,019 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:41:05,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 16:41:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:41:05,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 1090 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 16:41:05,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:41:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 16:41:05,419 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:41:05,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594865580] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:41:05,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:41:05,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 16:41:05,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398082710] [2023-12-02 16:41:05,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:41:05,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:41:05,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:41:05,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:41:05,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:41:05,422 INFO L87 Difference]: Start difference. First operand 7859 states and 12481 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:41:06,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:41:06,164 INFO L93 Difference]: Finished difference Result 20188 states and 31178 transitions. [2023-12-02 16:41:06,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:41:06,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2023-12-02 16:41:06,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:41:06,228 INFO L225 Difference]: With dead ends: 20188 [2023-12-02 16:41:06,229 INFO L226 Difference]: Without dead ends: 13975 [2023-12-02 16:41:06,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:41:06,251 INFO L413 NwaCegarLoop]: 3326 mSDtfsCounter, 3538 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3538 SdHoareTripleChecker+Valid, 3588 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:41:06,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3538 Valid, 3588 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:41:06,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13975 states. [2023-12-02 16:41:06,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13975 to 13939. [2023-12-02 16:41:06,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13939 states, 12235 states have (on average 1.5358398038414385) internal successors, (18791), 12270 states have internal predecessors, (18791), 1318 states have call successors, (1318), 385 states have call predecessors, (1318), 384 states have return successors, (1316), 1284 states have call predecessors, (1316), 1316 states have call successors, (1316) [2023-12-02 16:41:06,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13939 states to 13939 states and 21425 transitions. [2023-12-02 16:41:06,755 INFO L78 Accepts]: Start accepts. Automaton has 13939 states and 21425 transitions. Word has length 145 [2023-12-02 16:41:06,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:41:06,756 INFO L495 AbstractCegarLoop]: Abstraction has 13939 states and 21425 transitions. [2023-12-02 16:41:06,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:41:06,757 INFO L276 IsEmpty]: Start isEmpty. Operand 13939 states and 21425 transitions. [2023-12-02 16:41:06,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-12-02 16:41:06,786 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:41:06,787 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:41:06,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 16:41:06,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 16:41:06,987 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:41:06,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:41:06,988 INFO L85 PathProgramCache]: Analyzing trace with hash -290316936, now seen corresponding path program 1 times [2023-12-02 16:41:06,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:41:06,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364785561] [2023-12-02 16:41:06,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:41:06,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:41:07,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:41:07,162 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 16:41:07,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:41:07,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364785561] [2023-12-02 16:41:07,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364785561] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:41:07,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812190846] [2023-12-02 16:41:07,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:41:07,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:41:07,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:41:07,164 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:41:07,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 16:41:07,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:41:07,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 16:41:07,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:41:07,480 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 16:41:07,480 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:41:07,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812190846] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:41:07,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:41:07,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 16:41:07,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895115223] [2023-12-02 16:41:07,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:41:07,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:41:07,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:41:07,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:41:07,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:41:07,483 INFO L87 Difference]: Start difference. First operand 13939 states and 21425 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:41:08,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:41:08,383 INFO L93 Difference]: Finished difference Result 38332 states and 58266 transitions. [2023-12-02 16:41:08,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:41:08,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2023-12-02 16:41:08,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:41:08,443 INFO L225 Difference]: With dead ends: 38332 [2023-12-02 16:41:08,443 INFO L226 Difference]: Without dead ends: 26039 [2023-12-02 16:41:08,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:41:08,475 INFO L413 NwaCegarLoop]: 3326 mSDtfsCounter, 3541 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3541 SdHoareTripleChecker+Valid, 3588 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:41:08,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3541 Valid, 3588 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:41:08,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26039 states. [2023-12-02 16:41:09,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26039 to 25971. [2023-12-02 16:41:09,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25971 states, 22635 states have (on average 1.4988734261100067) internal successors, (33927), 22702 states have internal predecessors, (33927), 2566 states have call successors, (2566), 769 states have call predecessors, (2566), 768 states have return successors, (2564), 2500 states have call predecessors, (2564), 2564 states have call successors, (2564) [2023-12-02 16:41:09,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25971 states to 25971 states and 39057 transitions. [2023-12-02 16:41:09,247 INFO L78 Accepts]: Start accepts. Automaton has 25971 states and 39057 transitions. Word has length 145 [2023-12-02 16:41:09,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:41:09,247 INFO L495 AbstractCegarLoop]: Abstraction has 25971 states and 39057 transitions. [2023-12-02 16:41:09,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:41:09,248 INFO L276 IsEmpty]: Start isEmpty. Operand 25971 states and 39057 transitions. [2023-12-02 16:41:09,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-12-02 16:41:09,282 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:41:09,282 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:41:09,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 16:41:09,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 16:41:09,483 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:41:09,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:41:09,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1805483398, now seen corresponding path program 1 times [2023-12-02 16:41:09,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:41:09,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938570189] [2023-12-02 16:41:09,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:41:09,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:41:09,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:41:09,644 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 16:41:09,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:41:09,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938570189] [2023-12-02 16:41:09,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938570189] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:41:09,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936596379] [2023-12-02 16:41:09,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:41:09,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:41:09,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:41:09,646 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:41:09,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 16:41:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:41:09,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 16:41:09,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:41:09,962 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 16:41:09,962 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:41:09,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936596379] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:41:09,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:41:09,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 16:41:09,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233634066] [2023-12-02 16:41:09,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:41:09,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:41:09,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:41:09,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:41:09,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:41:09,964 INFO L87 Difference]: Start difference. First operand 25971 states and 39057 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:41:11,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:41:11,332 INFO L93 Difference]: Finished difference Result 74236 states and 111642 transitions. [2023-12-02 16:41:11,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:41:11,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2023-12-02 16:41:11,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:41:11,460 INFO L225 Difference]: With dead ends: 74236 [2023-12-02 16:41:11,460 INFO L226 Difference]: Without dead ends: 49911 [2023-12-02 16:41:11,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:41:11,504 INFO L413 NwaCegarLoop]: 3326 mSDtfsCounter, 3553 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3553 SdHoareTripleChecker+Valid, 3588 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:41:11,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3553 Valid, 3588 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:41:11,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49911 states. [2023-12-02 16:41:12,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49911 to 49779. [2023-12-02 16:41:12,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49779 states, 43243 states have (on average 1.4757301759822399) internal successors, (63815), 43374 states have internal predecessors, (63815), 4998 states have call successors, (4998), 1537 states have call predecessors, (4998), 1536 states have return successors, (4996), 4868 states have call predecessors, (4996), 4996 states have call successors, (4996) [2023-12-02 16:41:12,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49779 states to 49779 states and 73809 transitions. [2023-12-02 16:41:12,754 INFO L78 Accepts]: Start accepts. Automaton has 49779 states and 73809 transitions. Word has length 145 [2023-12-02 16:41:12,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:41:12,755 INFO L495 AbstractCegarLoop]: Abstraction has 49779 states and 73809 transitions. [2023-12-02 16:41:12,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:41:12,755 INFO L276 IsEmpty]: Start isEmpty. Operand 49779 states and 73809 transitions. [2023-12-02 16:41:12,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-12-02 16:41:12,797 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:41:12,798 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:41:12,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 16:41:12,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:41:12,998 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:41:12,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:41:12,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1062636420, now seen corresponding path program 1 times [2023-12-02 16:41:12,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:41:12,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487594425] [2023-12-02 16:41:12,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:41:12,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:41:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:41:13,625 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-02 16:41:13,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:41:13,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487594425] [2023-12-02 16:41:13,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487594425] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:41:13,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:41:13,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 16:41:13,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38917446] [2023-12-02 16:41:13,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:41:13,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:41:13,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:41:13,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:41:13,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:41:13,628 INFO L87 Difference]: Start difference. First operand 49779 states and 73809 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 16:41:17,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:41:17,074 INFO L93 Difference]: Finished difference Result 157179 states and 232279 transitions. [2023-12-02 16:41:17,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 16:41:17,075 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 145 [2023-12-02 16:41:17,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:41:17,488 INFO L225 Difference]: With dead ends: 157179 [2023-12-02 16:41:17,488 INFO L226 Difference]: Without dead ends: 109047 [2023-12-02 16:41:17,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 16:41:17,668 INFO L413 NwaCegarLoop]: 3355 mSDtfsCounter, 4210 mSDsluCounter, 6646 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4232 SdHoareTripleChecker+Valid, 10001 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 16:41:17,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4232 Valid, 10001 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 16:41:17,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109047 states. [2023-12-02 16:41:20,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109047 to 96371. [2023-12-02 16:41:20,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96371 states, 83563 states have (on average 1.4606344913418619) internal successors, (122055), 83822 states have internal predecessors, (122055), 9734 states have call successors, (9734), 3073 states have call predecessors, (9734), 3072 states have return successors, (9732), 9476 states have call predecessors, (9732), 9732 states have call successors, (9732) [2023-12-02 16:41:20,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96371 states to 96371 states and 141521 transitions. [2023-12-02 16:41:20,853 INFO L78 Accepts]: Start accepts. Automaton has 96371 states and 141521 transitions. Word has length 145 [2023-12-02 16:41:20,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:41:20,853 INFO L495 AbstractCegarLoop]: Abstraction has 96371 states and 141521 transitions. [2023-12-02 16:41:20,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 16:41:20,854 INFO L276 IsEmpty]: Start isEmpty. Operand 96371 states and 141521 transitions. [2023-12-02 16:41:20,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-12-02 16:41:20,928 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:41:20,928 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:41:20,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 16:41:20,929 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:41:20,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:41:20,929 INFO L85 PathProgramCache]: Analyzing trace with hash 413123040, now seen corresponding path program 1 times [2023-12-02 16:41:20,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:41:20,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628388490] [2023-12-02 16:41:20,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:41:20,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:41:20,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:41:21,296 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 44 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 16:41:21,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:41:21,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628388490] [2023-12-02 16:41:21,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628388490] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:41:21,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701029074] [2023-12-02 16:41:21,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:41:21,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:41:21,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:41:21,298 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:41:21,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 16:41:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:41:21,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 16:41:21,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:41:21,574 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-02 16:41:21,574 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:41:21,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701029074] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:41:21,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:41:21,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 16:41:21,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031795895] [2023-12-02 16:41:21,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:41:21,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:41:21,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:41:21,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:41:21,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:41:21,577 INFO L87 Difference]: Start difference. First operand 96371 states and 141521 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 16:41:25,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:41:25,359 INFO L93 Difference]: Finished difference Result 171511 states and 254548 transitions. [2023-12-02 16:41:25,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:41:25,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 169 [2023-12-02 16:41:25,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:41:25,736 INFO L225 Difference]: With dead ends: 171511 [2023-12-02 16:41:25,736 INFO L226 Difference]: Without dead ends: 123123 [2023-12-02 16:41:25,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:41:25,793 INFO L413 NwaCegarLoop]: 3480 mSDtfsCounter, 147 mSDsluCounter, 3340 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 6820 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:41:25,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 6820 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:41:25,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123123 states. [2023-12-02 16:41:29,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123123 to 116979. [2023-12-02 16:41:29,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116979 states, 103659 states have (on average 1.4886406390183198) internal successors, (154311), 103918 states have internal predecessors, (154311), 9990 states have call successors, (9990), 3329 states have call predecessors, (9990), 3328 states have return successors, (9988), 9732 states have call predecessors, (9988), 9988 states have call successors, (9988) [2023-12-02 16:41:29,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116979 states to 116979 states and 174289 transitions. [2023-12-02 16:41:29,907 INFO L78 Accepts]: Start accepts. Automaton has 116979 states and 174289 transitions. Word has length 169 [2023-12-02 16:41:29,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:41:29,908 INFO L495 AbstractCegarLoop]: Abstraction has 116979 states and 174289 transitions. [2023-12-02 16:41:29,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 16:41:29,908 INFO L276 IsEmpty]: Start isEmpty. Operand 116979 states and 174289 transitions. [2023-12-02 16:41:30,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2023-12-02 16:41:30,060 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:41:30,060 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:41:30,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 16:41:30,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:41:30,261 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:41:30,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:41:30,261 INFO L85 PathProgramCache]: Analyzing trace with hash -2049687036, now seen corresponding path program 1 times [2023-12-02 16:41:30,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:41:30,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232833282] [2023-12-02 16:41:30,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:41:30,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:41:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:41:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 10 proven. 87 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-12-02 16:41:30,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:41:30,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232833282] [2023-12-02 16:41:30,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232833282] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:41:30,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217434927] [2023-12-02 16:41:30,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:41:30,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:41:30,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:41:30,562 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:41:30,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 16:41:30,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:41:30,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 1394 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 16:41:30,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:41:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-12-02 16:41:31,011 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:41:31,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217434927] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:41:31,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:41:31,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-12-02 16:41:31,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436276468] [2023-12-02 16:41:31,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:41:31,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:41:31,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:41:31,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:41:31,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:41:31,014 INFO L87 Difference]: Start difference. First operand 116979 states and 174289 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 16:41:37,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:41:37,290 INFO L93 Difference]: Finished difference Result 346108 states and 519898 transitions. [2023-12-02 16:41:37,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:41:37,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 223 [2023-12-02 16:41:37,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:41:38,011 INFO L225 Difference]: With dead ends: 346108 [2023-12-02 16:41:38,012 INFO L226 Difference]: Without dead ends: 230775 [2023-12-02 16:41:38,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:41:38,206 INFO L413 NwaCegarLoop]: 3326 mSDtfsCounter, 3487 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3487 SdHoareTripleChecker+Valid, 3588 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:41:38,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3487 Valid, 3588 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:41:38,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230775 states. [2023-12-02 16:41:44,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230775 to 230003. [2023-12-02 16:41:44,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230003 states, 203883 states have (on average 1.4800988802401378) internal successors, (301767), 204398 states have internal predecessors, (301767), 19462 states have call successors, (19462), 6657 states have call predecessors, (19462), 6656 states have return successors, (19460), 18948 states have call predecessors, (19460), 19460 states have call successors, (19460) [2023-12-02 16:41:45,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230003 states to 230003 states and 340689 transitions. [2023-12-02 16:41:45,352 INFO L78 Accepts]: Start accepts. Automaton has 230003 states and 340689 transitions. Word has length 223 [2023-12-02 16:41:45,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:41:45,352 INFO L495 AbstractCegarLoop]: Abstraction has 230003 states and 340689 transitions. [2023-12-02 16:41:45,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 16:41:45,352 INFO L276 IsEmpty]: Start isEmpty. Operand 230003 states and 340689 transitions. [2023-12-02 16:41:45,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2023-12-02 16:41:45,882 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:41:45,883 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:41:45,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 16:41:46,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 16:41:46,083 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:41:46,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:41:46,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1338295450, now seen corresponding path program 1 times [2023-12-02 16:41:46,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:41:46,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949928879] [2023-12-02 16:41:46,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:41:46,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:41:46,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:41:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 10 proven. 87 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-12-02 16:41:46,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:41:46,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949928879] [2023-12-02 16:41:46,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949928879] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:41:46,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421985727] [2023-12-02 16:41:46,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:41:46,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:41:46,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:41:46,488 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:41:46,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 16:41:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:41:46,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 1394 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 16:41:46,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:41:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-12-02 16:41:46,914 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:41:46,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421985727] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:41:46,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:41:46,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-12-02 16:41:46,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437825366] [2023-12-02 16:41:46,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:41:46,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:41:46,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:41:46,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:41:46,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:41:46,917 INFO L87 Difference]: Start difference. First operand 230003 states and 340689 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 16:41:58,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:41:58,488 INFO L93 Difference]: Finished difference Result 683644 states and 1022170 transitions. [2023-12-02 16:41:58,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:41:58,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 223 [2023-12-02 16:41:58,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:41:59,803 INFO L225 Difference]: With dead ends: 683644 [2023-12-02 16:41:59,803 INFO L226 Difference]: Without dead ends: 455287 [2023-12-02 16:42:00,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:42:00,134 INFO L413 NwaCegarLoop]: 3339 mSDtfsCounter, 3487 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3487 SdHoareTripleChecker+Valid, 3601 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 16:42:00,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3487 Valid, 3601 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 16:42:00,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455287 states. [2023-12-02 16:42:13,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455287 to 453747. [2023-12-02 16:42:13,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453747 states, 402539 states have (on average 1.4733851875222028) internal successors, (593095), 403566 states have internal predecessors, (593095), 37894 states have call successors, (37894), 13313 states have call predecessors, (37894), 13312 states have return successors, (37892), 36868 states have call predecessors, (37892), 37892 states have call successors, (37892) [2023-12-02 16:42:15,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453747 states to 453747 states and 668881 transitions. [2023-12-02 16:42:15,754 INFO L78 Accepts]: Start accepts. Automaton has 453747 states and 668881 transitions. Word has length 223 [2023-12-02 16:42:15,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:42:15,755 INFO L495 AbstractCegarLoop]: Abstraction has 453747 states and 668881 transitions. [2023-12-02 16:42:15,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 16:42:15,755 INFO L276 IsEmpty]: Start isEmpty. Operand 453747 states and 668881 transitions. [2023-12-02 16:42:16,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2023-12-02 16:42:16,463 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:42:16,463 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:42:16,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 16:42:16,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 16:42:16,664 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:42:16,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:42:16,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1922566383, now seen corresponding path program 1 times [2023-12-02 16:42:16,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:42:16,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288021408] [2023-12-02 16:42:16,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:42:16,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:42:16,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:42:17,021 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 10 proven. 87 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-12-02 16:42:17,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:42:17,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288021408] [2023-12-02 16:42:17,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288021408] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:42:17,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483900306] [2023-12-02 16:42:17,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:42:17,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:42:17,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:42:17,022 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:42:17,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 16:42:17,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:42:17,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 1394 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 16:42:17,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:42:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-12-02 16:42:17,726 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:42:17,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483900306] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:42:17,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:42:17,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-12-02 16:42:17,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479343467] [2023-12-02 16:42:17,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:42:17,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:42:17,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:42:17,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:42:17,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:42:17,727 INFO L87 Difference]: Start difference. First operand 453747 states and 668881 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 16:42:39,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:42:39,955 INFO L93 Difference]: Finished difference Result 1351804 states and 2012378 transitions. [2023-12-02 16:42:39,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:42:39,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 223 [2023-12-02 16:42:39,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:42:42,823 INFO L225 Difference]: With dead ends: 1351804 [2023-12-02 16:42:42,823 INFO L226 Difference]: Without dead ends: 899703 [2023-12-02 16:42:43,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:42:43,634 INFO L413 NwaCegarLoop]: 3326 mSDtfsCounter, 3487 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3487 SdHoareTripleChecker+Valid, 3588 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:42:43,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3487 Valid, 3588 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:42:44,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899703 states. [2023-12-02 16:43:09,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899703 to 896627. [2023-12-02 16:43:10,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896627 states, 796267 states have (on average 1.467576830384783) internal successors, (1168583), 798318 states have internal predecessors, (1168583), 73734 states have call successors, (73734), 26625 states have call predecessors, (73734), 26624 states have return successors, (73732), 71684 states have call predecessors, (73732), 73732 states have call successors, (73732) [2023-12-02 16:43:13,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896627 states to 896627 states and 1316049 transitions. [2023-12-02 16:43:13,970 INFO L78 Accepts]: Start accepts. Automaton has 896627 states and 1316049 transitions. Word has length 223 [2023-12-02 16:43:13,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:43:13,971 INFO L495 AbstractCegarLoop]: Abstraction has 896627 states and 1316049 transitions. [2023-12-02 16:43:13,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 16:43:13,971 INFO L276 IsEmpty]: Start isEmpty. Operand 896627 states and 1316049 transitions. [2023-12-02 16:43:15,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2023-12-02 16:43:15,932 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:43:15,932 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:43:15,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 16:43:16,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 16:43:16,133 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:43:16,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:43:16,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1482008219, now seen corresponding path program 1 times [2023-12-02 16:43:16,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:43:16,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070980156] [2023-12-02 16:43:16,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:43:16,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:43:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:43:16,402 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 10 proven. 87 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-12-02 16:43:16,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:43:16,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070980156] [2023-12-02 16:43:16,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070980156] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:43:16,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224390790] [2023-12-02 16:43:16,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:43:16,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:43:16,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:43:16,404 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:43:16,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_beb839b3-ea22-43a6-96a3-8bd6ad430acd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 16:43:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:43:16,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 1394 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 16:43:16,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:43:16,863 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-12-02 16:43:16,863 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:43:16,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224390790] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:43:16,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:43:16,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-12-02 16:43:16,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940077636] [2023-12-02 16:43:16,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:43:16,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:43:16,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:43:16,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:43:16,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:43:16,865 INFO L87 Difference]: Start difference. First operand 896627 states and 1316049 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10)