./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91 --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 3add2c82410ff745811ed91690a644a775913a086eeabc1a421c899bac857c34 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:01:13,608 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:01:13,726 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-25 00:01:13,737 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:01:13,738 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:01:13,778 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:01:13,779 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:01:13,779 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:01:13,780 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:01:13,785 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:01:13,786 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:01:13,787 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:01:13,787 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:01:13,789 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:01:13,789 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:01:13,790 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:01:13,790 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:01:13,790 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:01:13,791 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:01:13,791 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:01:13,792 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:01:13,792 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:01:13,793 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:01:13,793 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:01:13,794 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:01:13,794 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:01:13,795 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:01:13,795 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:01:13,796 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:01:13,796 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:01:13,796 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:01:13,797 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:01:13,797 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:01:13,797 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:01:13,798 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:01:13,798 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:01:13,798 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:01:13,798 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:01:13,799 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:01:13,799 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:01:13,799 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:01:13,799 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:01:13,800 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:01:13,800 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:01:13,800 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:01:13,800 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:01:13,801 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:01:13,801 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_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3add2c82410ff745811ed91690a644a775913a086eeabc1a421c899bac857c34 [2023-11-25 00:01:14,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:01:14,155 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:01:14,157 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:01:14,160 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:01:14,160 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:01:14,161 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-2.c [2023-11-25 00:01:17,187 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:01:18,075 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:01:18,076 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-2.c [2023-11-25 00:01:18,127 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/data/4d27a47c3/9ea2d8d8cd274d489d6ae1bbf3a3ed53/FLAG24bb7a776 [2023-11-25 00:01:18,144 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/data/4d27a47c3/9ea2d8d8cd274d489d6ae1bbf3a3ed53 [2023-11-25 00:01:18,149 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:01:18,151 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:01:18,152 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:01:18,152 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:01:18,162 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:01:18,163 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:01:18" (1/1) ... [2023-11-25 00:01:18,164 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@756df0a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:18, skipping insertion in model container [2023-11-25 00:01:18,165 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:01:18" (1/1) ... [2023-11-25 00:01:18,508 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:01:20,820 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_63425e2d-8853-4c31-93b7-db2f3ede3f46/sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-2.c[380593,380606] [2023-11-25 00:01:20,859 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_63425e2d-8853-4c31-93b7-db2f3ede3f46/sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-2.c[383339,383352] [2023-11-25 00:01:21,135 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:01:21,146 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:01:22,340 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_63425e2d-8853-4c31-93b7-db2f3ede3f46/sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-2.c[380593,380606] [2023-11-25 00:01:22,347 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_63425e2d-8853-4c31-93b7-db2f3ede3f46/sv-benchmarks/c/combinations/Problem05_label49+token_ring.04.cil-2.c[383339,383352] [2023-11-25 00:01:22,378 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:01:22,465 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:01:22,466 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:22 WrapperNode [2023-11-25 00:01:22,466 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:01:22,468 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:01:22,468 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:01:22,468 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:01:22,476 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:22" (1/1) ... [2023-11-25 00:01:22,572 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:22" (1/1) ... [2023-11-25 00:01:23,021 INFO L138 Inliner]: procedures = 52, calls = 54, calls flagged for inlining = 29, calls inlined = 29, statements flattened = 12754 [2023-11-25 00:01:23,022 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:01:23,023 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:01:23,023 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:01:23,023 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:01:23,033 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:22" (1/1) ... [2023-11-25 00:01:23,033 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:22" (1/1) ... [2023-11-25 00:01:23,084 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:22" (1/1) ... [2023-11-25 00:01:23,095 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:22" (1/1) ... [2023-11-25 00:01:23,427 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:22" (1/1) ... [2023-11-25 00:01:23,522 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:22" (1/1) ... [2023-11-25 00:01:23,561 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:22" (1/1) ... [2023-11-25 00:01:23,583 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:22" (1/1) ... [2023-11-25 00:01:23,641 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:01:23,642 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:01:23,643 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:01:23,643 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:01:23,644 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:22" (1/1) ... [2023-11-25 00:01:23,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:01:23,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:01:23,674 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:01:23,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:01:23,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:01:23,725 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-25 00:01:23,725 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-25 00:01:23,725 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-25 00:01:23,726 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-25 00:01:23,726 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-25 00:01:23,726 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-25 00:01:23,726 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-11-25 00:01:23,726 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-11-25 00:01:23,726 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-25 00:01:23,727 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-25 00:01:23,727 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-25 00:01:23,727 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-25 00:01:23,727 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-25 00:01:23,728 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-25 00:01:23,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:01:23,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:01:23,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:01:23,880 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:01:23,883 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:01:33,512 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:01:35,932 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:01:35,932 INFO L309 CfgBuilder]: Removed 8 assume(true) statements. [2023-11-25 00:01:35,935 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:01:35 BoogieIcfgContainer [2023-11-25 00:01:35,936 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:01:35,939 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:01:35,940 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:01:35,943 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:01:35,943 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:01:18" (1/3) ... [2023-11-25 00:01:35,947 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2622d9cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:01:35, skipping insertion in model container [2023-11-25 00:01:35,947 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:01:22" (2/3) ... [2023-11-25 00:01:35,948 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2622d9cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:01:35, skipping insertion in model container [2023-11-25 00:01:35,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:01:35" (3/3) ... [2023-11-25 00:01:35,950 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.04.cil-2.c [2023-11-25 00:01:35,971 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:01:35,972 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-25 00:01:36,091 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:01:36,100 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;@17df3c38, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:01:36,101 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-25 00:01:36,115 INFO L276 IsEmpty]: Start isEmpty. Operand has 1754 states, 1724 states have (on average 1.9698375870069607) internal successors, (3396), 1729 states have internal predecessors, (3396), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-25 00:01:36,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-25 00:01:36,129 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:36,130 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] [2023-11-25 00:01:36,131 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:01:36,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:36,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1444221430, now seen corresponding path program 1 times [2023-11-25 00:01:36,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:36,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526988855] [2023-11-25 00:01:36,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:36,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:36,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:01:36,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:36,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526988855] [2023-11-25 00:01:36,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526988855] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:01:36,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:01:36,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:01:36,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581139999] [2023-11-25 00:01:36,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:01:36,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:01:36,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:36,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:01:36,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:01:36,686 INFO L87 Difference]: Start difference. First operand has 1754 states, 1724 states have (on average 1.9698375870069607) internal successors, (3396), 1729 states have internal predecessors, (3396), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2023-11-25 00:01:37,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:37,603 INFO L93 Difference]: Finished difference Result 3595 states and 7014 transitions. [2023-11-25 00:01:37,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:01:37,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 44 [2023-11-25 00:01:37,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:37,639 INFO L225 Difference]: With dead ends: 3595 [2023-11-25 00:01:37,640 INFO L226 Difference]: Without dead ends: 1840 [2023-11-25 00:01:37,653 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 [2023-11-25 00:01:37,659 INFO L413 NwaCegarLoop]: 3288 mSDtfsCounter, 3533 mSDsluCounter, 3220 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3533 SdHoareTripleChecker+Valid, 6508 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:37,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3533 Valid, 6508 Invalid, 616 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-25 00:01:37,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2023-11-25 00:01:37,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1839. [2023-11-25 00:01:37,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1839 states, 1791 states have (on average 1.9430485762144054) internal successors, (3480), 1795 states have internal predecessors, (3480), 34 states have call successors, (34), 13 states have call predecessors, (34), 12 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-25 00:01:37,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1839 states to 1839 states and 3546 transitions. [2023-11-25 00:01:37,824 INFO L78 Accepts]: Start accepts. Automaton has 1839 states and 3546 transitions. Word has length 44 [2023-11-25 00:01:37,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:37,825 INFO L495 AbstractCegarLoop]: Abstraction has 1839 states and 3546 transitions. [2023-11-25 00:01:37,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2023-11-25 00:01:37,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1839 states and 3546 transitions. [2023-11-25 00:01:37,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-25 00:01:37,832 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:37,833 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:01:37,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:01:37,833 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:01:37,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:37,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1395171591, now seen corresponding path program 1 times [2023-11-25 00:01:37,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:37,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598604811] [2023-11-25 00:01:37,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:37,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:38,215 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-25 00:01:38,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:38,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598604811] [2023-11-25 00:01:38,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598604811] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:01:38,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027958725] [2023-11-25 00:01:38,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:38,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:38,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:01:38,223 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:01:38,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:01:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:38,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:01:38,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:01:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-25 00:01:38,479 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:01:38,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027958725] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:01:38,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:01:38,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-25 00:01:38,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506494517] [2023-11-25 00:01:38,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:01:38,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:01:38,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:38,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:01:38,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:01:38,487 INFO L87 Difference]: Start difference. First operand 1839 states and 3546 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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) [2023-11-25 00:01:39,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:39,047 INFO L93 Difference]: Finished difference Result 2218 states and 4089 transitions. [2023-11-25 00:01:39,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:01:39,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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 82 [2023-11-25 00:01:39,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:39,066 INFO L225 Difference]: With dead ends: 2218 [2023-11-25 00:01:39,067 INFO L226 Difference]: Without dead ends: 2025 [2023-11-25 00:01:39,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:01:39,071 INFO L413 NwaCegarLoop]: 3225 mSDtfsCounter, 3394 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3394 SdHoareTripleChecker+Valid, 3342 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:39,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3394 Valid, 3342 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-25 00:01:39,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2023-11-25 00:01:39,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 2019. [2023-11-25 00:01:39,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2019 states, 1933 states have (on average 1.9022245214692188) internal successors, (3677), 1938 states have internal predecessors, (3677), 60 states have call successors, (60), 25 states have call predecessors, (60), 24 states have return successors, (58), 56 states have call predecessors, (58), 58 states have call successors, (58) [2023-11-25 00:01:39,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 3795 transitions. [2023-11-25 00:01:39,164 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 3795 transitions. Word has length 82 [2023-11-25 00:01:39,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:39,165 INFO L495 AbstractCegarLoop]: Abstraction has 2019 states and 3795 transitions. [2023-11-25 00:01:39,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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) [2023-11-25 00:01:39,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 3795 transitions. [2023-11-25 00:01:39,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-25 00:01:39,175 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:39,176 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:01:39,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-25 00:01:39,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:39,383 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:01:39,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:39,384 INFO L85 PathProgramCache]: Analyzing trace with hash -547120359, now seen corresponding path program 1 times [2023-11-25 00:01:39,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:39,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914916277] [2023-11-25 00:01:39,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:39,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:39,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:39,651 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-25 00:01:39,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:39,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914916277] [2023-11-25 00:01:39,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914916277] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:01:39,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132038461] [2023-11-25 00:01:39,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:39,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:39,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:01:39,657 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:01:39,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:01:39,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:39,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:01:39,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:01:39,891 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-25 00:01:39,891 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:01:39,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132038461] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:01:39,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:01:39,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-25 00:01:39,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604547577] [2023-11-25 00:01:39,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:01:39,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:01:39,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:39,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:01:39,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:01:39,896 INFO L87 Difference]: Start difference. First operand 2019 states and 3795 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 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) [2023-11-25 00:01:40,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:40,482 INFO L93 Difference]: Finished difference Result 2752 states and 4838 transitions. [2023-11-25 00:01:40,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:01:40,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 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 82 [2023-11-25 00:01:40,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:40,501 INFO L225 Difference]: With dead ends: 2752 [2023-11-25 00:01:40,501 INFO L226 Difference]: Without dead ends: 2379 [2023-11-25 00:01:40,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:01:40,505 INFO L413 NwaCegarLoop]: 3223 mSDtfsCounter, 3397 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3397 SdHoareTripleChecker+Valid, 3340 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:40,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3397 Valid, 3340 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-25 00:01:40,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2023-11-25 00:01:40,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 2371. [2023-11-25 00:01:40,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2371 states, 2211 states have (on average 1.835820895522388) internal successors, (4059), 2218 states have internal predecessors, (4059), 110 states have call successors, (110), 49 states have call predecessors, (110), 48 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2023-11-25 00:01:40,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2371 states to 2371 states and 4277 transitions. [2023-11-25 00:01:40,620 INFO L78 Accepts]: Start accepts. Automaton has 2371 states and 4277 transitions. Word has length 82 [2023-11-25 00:01:40,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:40,620 INFO L495 AbstractCegarLoop]: Abstraction has 2371 states and 4277 transitions. [2023-11-25 00:01:40,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 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) [2023-11-25 00:01:40,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2371 states and 4277 transitions. [2023-11-25 00:01:40,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-25 00:01:40,625 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:40,625 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:01:40,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-25 00:01:40,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:40,832 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:01:40,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:40,832 INFO L85 PathProgramCache]: Analyzing trace with hash 749497081, now seen corresponding path program 1 times [2023-11-25 00:01:40,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:40,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969028661] [2023-11-25 00:01:40,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:40,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:40,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:40,991 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-25 00:01:40,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:40,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969028661] [2023-11-25 00:01:40,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969028661] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:01:40,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:01:40,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:01:40,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957572155] [2023-11-25 00:01:40,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:01:41,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:01:41,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:41,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:01:41,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:01:41,002 INFO L87 Difference]: Start difference. First operand 2371 states and 4277 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-25 00:01:41,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:41,699 INFO L93 Difference]: Finished difference Result 2947 states and 5092 transitions. [2023-11-25 00:01:41,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:01:41,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 82 [2023-11-25 00:01:41,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:41,722 INFO L225 Difference]: With dead ends: 2947 [2023-11-25 00:01:41,722 INFO L226 Difference]: Without dead ends: 2567 [2023-11-25 00:01:41,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:01:41,727 INFO L413 NwaCegarLoop]: 3245 mSDtfsCounter, 59 mSDsluCounter, 3186 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 6431 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:41,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 6431 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:01:41,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2023-11-25 00:01:41,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 2495. [2023-11-25 00:01:41,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2495 states, 2327 states have (on average 1.821658788139235) internal successors, (4239), 2334 states have internal predecessors, (4239), 114 states have call successors, (114), 53 states have call predecessors, (114), 52 states have return successors, (112), 108 states have call predecessors, (112), 112 states have call successors, (112) [2023-11-25 00:01:41,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 4465 transitions. [2023-11-25 00:01:41,858 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 4465 transitions. Word has length 82 [2023-11-25 00:01:41,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:41,860 INFO L495 AbstractCegarLoop]: Abstraction has 2495 states and 4465 transitions. [2023-11-25 00:01:41,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-25 00:01:41,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 4465 transitions. [2023-11-25 00:01:41,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-25 00:01:41,865 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:41,865 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:01:41,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-25 00:01:41,866 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:01:41,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:41,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1367366963, now seen corresponding path program 1 times [2023-11-25 00:01:41,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:41,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624019387] [2023-11-25 00:01:41,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:41,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:41,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:41,975 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-25 00:01:41,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:41,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624019387] [2023-11-25 00:01:41,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624019387] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:01:41,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:01:41,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:01:41,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241685019] [2023-11-25 00:01:41,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:01:41,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:01:41,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:41,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:01:41,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:01:41,978 INFO L87 Difference]: Start difference. First operand 2495 states and 4465 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-25 00:01:42,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:42,526 INFO L93 Difference]: Finished difference Result 4156 states and 6826 transitions. [2023-11-25 00:01:42,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:01:42,527 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 109 [2023-11-25 00:01:42,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:42,552 INFO L225 Difference]: With dead ends: 4156 [2023-11-25 00:01:42,553 INFO L226 Difference]: Without dead ends: 3307 [2023-11-25 00:01:42,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:01:42,559 INFO L413 NwaCegarLoop]: 3195 mSDtfsCounter, 3387 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3387 SdHoareTripleChecker+Valid, 3312 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:42,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3387 Valid, 3312 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-25 00:01:42,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3307 states. [2023-11-25 00:01:42,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3307 to 3291. [2023-11-25 00:01:42,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3291 states, 2971 states have (on average 1.7256815886906764) internal successors, (5127), 2982 states have internal predecessors, (5127), 214 states have call successors, (214), 105 states have call predecessors, (214), 104 states have return successors, (212), 204 states have call predecessors, (212), 212 states have call successors, (212) [2023-11-25 00:01:42,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3291 states to 3291 states and 5553 transitions. [2023-11-25 00:01:42,860 INFO L78 Accepts]: Start accepts. Automaton has 3291 states and 5553 transitions. Word has length 109 [2023-11-25 00:01:42,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:42,865 INFO L495 AbstractCegarLoop]: Abstraction has 3291 states and 5553 transitions. [2023-11-25 00:01:42,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-25 00:01:42,866 INFO L276 IsEmpty]: Start isEmpty. Operand 3291 states and 5553 transitions. [2023-11-25 00:01:42,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-25 00:01:42,879 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:42,880 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:01:42,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-25 00:01:42,881 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:01:42,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:42,883 INFO L85 PathProgramCache]: Analyzing trace with hash 625474217, now seen corresponding path program 1 times [2023-11-25 00:01:42,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:42,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070913529] [2023-11-25 00:01:42,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:42,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:42,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-25 00:01:43,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:43,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070913529] [2023-11-25 00:01:43,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070913529] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:01:43,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:01:43,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:01:43,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858985654] [2023-11-25 00:01:43,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:01:43,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:01:43,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:43,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:01:43,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:01:43,038 INFO L87 Difference]: Start difference. First operand 3291 states and 5553 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-25 00:01:43,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:43,787 INFO L93 Difference]: Finished difference Result 6508 states and 10066 transitions. [2023-11-25 00:01:43,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:01:43,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 109 [2023-11-25 00:01:43,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:43,824 INFO L225 Difference]: With dead ends: 6508 [2023-11-25 00:01:43,824 INFO L226 Difference]: Without dead ends: 4863 [2023-11-25 00:01:43,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:01:43,833 INFO L413 NwaCegarLoop]: 3208 mSDtfsCounter, 3390 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3390 SdHoareTripleChecker+Valid, 3325 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:43,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3390 Valid, 3325 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:01:43,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4863 states. [2023-11-25 00:01:44,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4863 to 4835. [2023-11-25 00:01:44,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4835 states, 4219 states have (on average 1.617207869163309) internal successors, (6823), 4238 states have internal predecessors, (6823), 406 states have call successors, (406), 209 states have call predecessors, (406), 208 states have return successors, (404), 388 states have call predecessors, (404), 404 states have call successors, (404) [2023-11-25 00:01:44,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4835 states to 4835 states and 7633 transitions. [2023-11-25 00:01:44,121 INFO L78 Accepts]: Start accepts. Automaton has 4835 states and 7633 transitions. Word has length 109 [2023-11-25 00:01:44,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:44,122 INFO L495 AbstractCegarLoop]: Abstraction has 4835 states and 7633 transitions. [2023-11-25 00:01:44,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-25 00:01:44,123 INFO L276 IsEmpty]: Start isEmpty. Operand 4835 states and 7633 transitions. [2023-11-25 00:01:44,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-25 00:01:44,138 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:44,138 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, 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] [2023-11-25 00:01:44,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-25 00:01:44,139 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:01:44,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:44,140 INFO L85 PathProgramCache]: Analyzing trace with hash -149734594, now seen corresponding path program 1 times [2023-11-25 00:01:44,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:44,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111637376] [2023-11-25 00:01:44,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:44,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:44,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:44,531 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-25 00:01:44,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:44,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111637376] [2023-11-25 00:01:44,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111637376] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:01:44,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673189643] [2023-11-25 00:01:44,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:44,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:44,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:01:44,534 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:01:44,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-25 00:01:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:44,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-25 00:01:44,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:01:44,784 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-25 00:01:44,785 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:01:44,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673189643] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:01:44,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:01:44,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-25 00:01:44,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516126058] [2023-11-25 00:01:44,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:01:44,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:01:44,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:44,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:01:44,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:01:44,789 INFO L87 Difference]: Start difference. First operand 4835 states and 7633 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-25 00:01:45,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:45,518 INFO L93 Difference]: Finished difference Result 6499 states and 10031 transitions. [2023-11-25 00:01:45,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:01:45,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 124 [2023-11-25 00:01:45,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:45,550 INFO L225 Difference]: With dead ends: 6499 [2023-11-25 00:01:45,550 INFO L226 Difference]: Without dead ends: 4855 [2023-11-25 00:01:45,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:01:45,559 INFO L413 NwaCegarLoop]: 3269 mSDtfsCounter, 120 mSDsluCounter, 3175 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 6444 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:45,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 6444 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:01:45,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4855 states. [2023-11-25 00:01:45,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4855 to 4819. [2023-11-25 00:01:45,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4819 states, 4203 states have (on average 1.6043302403045443) internal successors, (6743), 4222 states have internal predecessors, (6743), 406 states have call successors, (406), 209 states have call predecessors, (406), 208 states have return successors, (404), 388 states have call predecessors, (404), 404 states have call successors, (404) [2023-11-25 00:01:45,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4819 states to 4819 states and 7553 transitions. [2023-11-25 00:01:45,851 INFO L78 Accepts]: Start accepts. Automaton has 4819 states and 7553 transitions. Word has length 124 [2023-11-25 00:01:45,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:45,852 INFO L495 AbstractCegarLoop]: Abstraction has 4819 states and 7553 transitions. [2023-11-25 00:01:45,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-25 00:01:45,853 INFO L276 IsEmpty]: Start isEmpty. Operand 4819 states and 7553 transitions. [2023-11-25 00:01:45,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-25 00:01:45,868 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:45,868 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:01:45,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-25 00:01:46,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:46,075 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:01:46,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:46,076 INFO L85 PathProgramCache]: Analyzing trace with hash -340810240, now seen corresponding path program 1 times [2023-11-25 00:01:46,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:46,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128663592] [2023-11-25 00:01:46,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:46,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:46,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:46,491 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-25 00:01:46,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:46,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128663592] [2023-11-25 00:01:46,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128663592] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:01:46,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311319221] [2023-11-25 00:01:46,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:46,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:46,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:01:46,494 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:01:46,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-25 00:01:46,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:46,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:01:46,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:01:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-25 00:01:46,724 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:01:46,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311319221] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:01:46,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:01:46,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-25 00:01:46,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511667328] [2023-11-25 00:01:46,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:01:46,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:01:46,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:46,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:01:46,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:01:46,728 INFO L87 Difference]: Start difference. First operand 4819 states and 7553 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-25 00:01:47,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:47,386 INFO L93 Difference]: Finished difference Result 7153 states and 10638 transitions. [2023-11-25 00:01:47,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:01:47,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 124 [2023-11-25 00:01:47,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:47,416 INFO L225 Difference]: With dead ends: 7153 [2023-11-25 00:01:47,416 INFO L226 Difference]: Without dead ends: 5533 [2023-11-25 00:01:47,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:01:47,430 INFO L413 NwaCegarLoop]: 3197 mSDtfsCounter, 3399 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3399 SdHoareTripleChecker+Valid, 3226 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:47,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3399 Valid, 3226 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-25 00:01:47,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5533 states. [2023-11-25 00:01:47,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5533 to 5533. [2023-11-25 00:01:47,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5533 states, 4825 states have (on average 1.5496373056994819) internal successors, (7477), 4844 states have internal predecessors, (7477), 436 states have call successors, (436), 271 states have call predecessors, (436), 270 states have return successors, (434), 418 states have call predecessors, (434), 434 states have call successors, (434) [2023-11-25 00:01:47,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5533 states to 5533 states and 8347 transitions. [2023-11-25 00:01:47,752 INFO L78 Accepts]: Start accepts. Automaton has 5533 states and 8347 transitions. Word has length 124 [2023-11-25 00:01:47,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:47,752 INFO L495 AbstractCegarLoop]: Abstraction has 5533 states and 8347 transitions. [2023-11-25 00:01:47,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-25 00:01:47,753 INFO L276 IsEmpty]: Start isEmpty. Operand 5533 states and 8347 transitions. [2023-11-25 00:01:47,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-25 00:01:47,771 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:47,771 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:01:47,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-25 00:01:47,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:47,978 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:01:47,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:47,979 INFO L85 PathProgramCache]: Analyzing trace with hash 434954765, now seen corresponding path program 1 times [2023-11-25 00:01:47,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:47,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638996193] [2023-11-25 00:01:47,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:47,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-25 00:01:48,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:48,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638996193] [2023-11-25 00:01:48,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638996193] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:01:48,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878513869] [2023-11-25 00:01:48,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:48,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:48,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:01:48,447 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:01:48,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-25 00:01:48,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:48,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-25 00:01:48,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:01:48,673 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-25 00:01:48,673 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:01:48,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878513869] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:01:48,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:01:48,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-25 00:01:48,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085399799] [2023-11-25 00:01:48,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:01:48,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:01:48,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:48,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:01:48,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:01:48,676 INFO L87 Difference]: Start difference. First operand 5533 states and 8347 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-25 00:01:49,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:49,489 INFO L93 Difference]: Finished difference Result 10841 states and 15428 transitions. [2023-11-25 00:01:49,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:01:49,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 124 [2023-11-25 00:01:49,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:49,524 INFO L225 Difference]: With dead ends: 10841 [2023-11-25 00:01:49,524 INFO L226 Difference]: Without dead ends: 6955 [2023-11-25 00:01:49,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:01:49,539 INFO L413 NwaCegarLoop]: 3197 mSDtfsCounter, 70 mSDsluCounter, 3165 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 6362 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:49,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 6362 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:01:49,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6955 states. [2023-11-25 00:01:49,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6955 to 5973. [2023-11-25 00:01:49,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5973 states, 5229 states have (on average 1.5469497035762096) internal successors, (8089), 5249 states have internal predecessors, (8089), 454 states have call successors, (454), 289 states have call predecessors, (454), 288 states have return successors, (452), 435 states have call predecessors, (452), 452 states have call successors, (452) [2023-11-25 00:01:49,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5973 states to 5973 states and 8995 transitions. [2023-11-25 00:01:49,842 INFO L78 Accepts]: Start accepts. Automaton has 5973 states and 8995 transitions. Word has length 124 [2023-11-25 00:01:49,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:49,842 INFO L495 AbstractCegarLoop]: Abstraction has 5973 states and 8995 transitions. [2023-11-25 00:01:49,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-25 00:01:49,843 INFO L276 IsEmpty]: Start isEmpty. Operand 5973 states and 8995 transitions. [2023-11-25 00:01:49,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-25 00:01:49,858 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:49,858 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:01:49,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-25 00:01:50,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:50,066 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:01:50,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:50,066 INFO L85 PathProgramCache]: Analyzing trace with hash 391468224, now seen corresponding path program 2 times [2023-11-25 00:01:50,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:50,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177747052] [2023-11-25 00:01:50,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:50,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:50,225 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-25 00:01:50,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:50,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177747052] [2023-11-25 00:01:50,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177747052] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:01:50,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16495980] [2023-11-25 00:01:50,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-25 00:01:50,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:50,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:01:50,227 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:01:50,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-25 00:01:50,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-25 00:01:50,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:01:50,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:01:50,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:01:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-25 00:01:50,451 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:01:50,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16495980] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:01:50,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:01:50,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-25 00:01:50,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35034884] [2023-11-25 00:01:50,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:01:50,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:01:50,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:50,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:01:50,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:01:50,455 INFO L87 Difference]: Start difference. First operand 5973 states and 8995 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-25 00:01:51,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:51,210 INFO L93 Difference]: Finished difference Result 9659 states and 14005 transitions. [2023-11-25 00:01:51,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:01:51,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 124 [2023-11-25 00:01:51,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:51,237 INFO L225 Difference]: With dead ends: 9659 [2023-11-25 00:01:51,237 INFO L226 Difference]: Without dead ends: 7447 [2023-11-25 00:01:51,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:01:51,247 INFO L413 NwaCegarLoop]: 3263 mSDtfsCounter, 79 mSDsluCounter, 3186 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 6449 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:51,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 6449 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:01:51,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7447 states. [2023-11-25 00:01:51,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7447 to 6757. [2023-11-25 00:01:51,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6757 states, 5949 states have (on average 1.5372331484283073) internal successors, (9145), 5969 states have internal predecessors, (9145), 486 states have call successors, (486), 321 states have call predecessors, (486), 320 states have return successors, (484), 467 states have call predecessors, (484), 484 states have call successors, (484) [2023-11-25 00:01:51,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6757 states to 6757 states and 10115 transitions. [2023-11-25 00:01:51,577 INFO L78 Accepts]: Start accepts. Automaton has 6757 states and 10115 transitions. Word has length 124 [2023-11-25 00:01:51,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:51,578 INFO L495 AbstractCegarLoop]: Abstraction has 6757 states and 10115 transitions. [2023-11-25 00:01:51,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-25 00:01:51,578 INFO L276 IsEmpty]: Start isEmpty. Operand 6757 states and 10115 transitions. [2023-11-25 00:01:51,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-25 00:01:51,595 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:51,595 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, 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] [2023-11-25 00:01:51,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-25 00:01:51,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-25 00:01:51,802 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:01:51,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:51,803 INFO L85 PathProgramCache]: Analyzing trace with hash 744743866, now seen corresponding path program 1 times [2023-11-25 00:01:51,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:51,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180601973] [2023-11-25 00:01:51,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:51,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-25 00:01:51,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:51,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180601973] [2023-11-25 00:01:51,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180601973] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:01:51,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485436596] [2023-11-25 00:01:51,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:51,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:51,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:01:51,938 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:01:51,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-25 00:01:52,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:52,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:01:52,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:01:52,148 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-25 00:01:52,149 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:01:52,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485436596] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:01:52,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:01:52,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-25 00:01:52,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261341044] [2023-11-25 00:01:52,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:01:52,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:01:52,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:52,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:01:52,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:01:52,152 INFO L87 Difference]: Start difference. First operand 6757 states and 10115 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-25 00:01:53,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:53,090 INFO L93 Difference]: Finished difference Result 11451 states and 16549 transitions. [2023-11-25 00:01:53,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:01:53,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 124 [2023-11-25 00:01:53,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:53,126 INFO L225 Difference]: With dead ends: 11451 [2023-11-25 00:01:53,126 INFO L226 Difference]: Without dead ends: 8815 [2023-11-25 00:01:53,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:01:53,136 INFO L413 NwaCegarLoop]: 3274 mSDtfsCounter, 91 mSDsluCounter, 3187 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 6461 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:53,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 6461 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:01:53,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8815 states. [2023-11-25 00:01:53,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8815 to 7901. [2023-11-25 00:01:53,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7901 states, 6997 states have (on average 1.5242246677147349) internal successors, (10665), 7017 states have internal predecessors, (10665), 534 states have call successors, (534), 369 states have call predecessors, (534), 368 states have return successors, (532), 515 states have call predecessors, (532), 532 states have call successors, (532) [2023-11-25 00:01:53,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7901 states to 7901 states and 11731 transitions. [2023-11-25 00:01:53,512 INFO L78 Accepts]: Start accepts. Automaton has 7901 states and 11731 transitions. Word has length 124 [2023-11-25 00:01:53,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:53,513 INFO L495 AbstractCegarLoop]: Abstraction has 7901 states and 11731 transitions. [2023-11-25 00:01:53,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-25 00:01:53,513 INFO L276 IsEmpty]: Start isEmpty. Operand 7901 states and 11731 transitions. [2023-11-25 00:01:53,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-25 00:01:53,533 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:53,533 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:01:53,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-25 00:01:53,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-25 00:01:53,741 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:01:53,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:53,742 INFO L85 PathProgramCache]: Analyzing trace with hash -279977340, now seen corresponding path program 1 times [2023-11-25 00:01:53,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:53,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366153195] [2023-11-25 00:01:53,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:53,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:53,879 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-25 00:01:53,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:53,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366153195] [2023-11-25 00:01:53,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366153195] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:01:53,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076870904] [2023-11-25 00:01:53,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:53,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:53,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:01:53,882 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:01:53,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-25 00:01:54,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:54,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:01:54,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:01:54,111 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-25 00:01:54,111 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:01:54,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076870904] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:01:54,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:01:54,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-25 00:01:54,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301187964] [2023-11-25 00:01:54,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:01:54,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:01:54,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:54,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:01:54,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:01:54,114 INFO L87 Difference]: Start difference. First operand 7901 states and 11731 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-25 00:01:54,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:54,955 INFO L93 Difference]: Finished difference Result 13507 states and 19421 transitions. [2023-11-25 00:01:54,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:01:54,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 124 [2023-11-25 00:01:54,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:54,987 INFO L225 Difference]: With dead ends: 13507 [2023-11-25 00:01:54,987 INFO L226 Difference]: Without dead ends: 10311 [2023-11-25 00:01:54,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:01:54,999 INFO L413 NwaCegarLoop]: 3269 mSDtfsCounter, 85 mSDsluCounter, 3187 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 6456 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:54,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 6456 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:01:55,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10311 states. [2023-11-25 00:01:55,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10311 to 9509. [2023-11-25 00:01:55,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9509 states, 8461 states have (on average 1.5044321002245598) internal successors, (12729), 8481 states have internal predecessors, (12729), 606 states have call successors, (606), 441 states have call predecessors, (606), 440 states have return successors, (604), 587 states have call predecessors, (604), 604 states have call successors, (604) [2023-11-25 00:01:55,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9509 states to 9509 states and 13939 transitions. [2023-11-25 00:01:55,433 INFO L78 Accepts]: Start accepts. Automaton has 9509 states and 13939 transitions. Word has length 124 [2023-11-25 00:01:55,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:55,434 INFO L495 AbstractCegarLoop]: Abstraction has 9509 states and 13939 transitions. [2023-11-25 00:01:55,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-25 00:01:55,434 INFO L276 IsEmpty]: Start isEmpty. Operand 9509 states and 13939 transitions. [2023-11-25 00:01:55,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-25 00:01:55,461 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:55,461 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:01:55,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-25 00:01:55,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:55,671 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:01:55,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:55,672 INFO L85 PathProgramCache]: Analyzing trace with hash 2108581764, now seen corresponding path program 1 times [2023-11-25 00:01:55,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:55,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448242804] [2023-11-25 00:01:55,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:55,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:55,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:55,908 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-25 00:01:55,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:55,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448242804] [2023-11-25 00:01:55,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448242804] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:01:55,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837472132] [2023-11-25 00:01:55,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:55,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:55,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:01:55,911 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:01:55,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-25 00:01:56,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:56,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:01:56,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:01:56,132 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-25 00:01:56,133 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:01:56,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837472132] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:01:56,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:01:56,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-25 00:01:56,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073289742] [2023-11-25 00:01:56,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:01:56,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:01:56,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:01:56,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:01:56,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:01:56,136 INFO L87 Difference]: Start difference. First operand 9509 states and 13939 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-25 00:01:57,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:01:57,035 INFO L93 Difference]: Finished difference Result 16407 states and 23445 transitions. [2023-11-25 00:01:57,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:01:57,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 125 [2023-11-25 00:01:57,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:01:57,074 INFO L225 Difference]: With dead ends: 16407 [2023-11-25 00:01:57,074 INFO L226 Difference]: Without dead ends: 12519 [2023-11-25 00:01:57,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:01:57,087 INFO L413 NwaCegarLoop]: 3247 mSDtfsCounter, 73 mSDsluCounter, 3187 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 6434 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-25 00:01:57,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 6434 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-25 00:01:57,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12519 states. [2023-11-25 00:01:57,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12519 to 11957. [2023-11-25 00:01:57,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11957 states, 10693 states have (on average 1.4866735247358085) internal successors, (15897), 10713 states have internal predecessors, (15897), 714 states have call successors, (714), 549 states have call predecessors, (714), 548 states have return successors, (712), 695 states have call predecessors, (712), 712 states have call successors, (712) [2023-11-25 00:01:57,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11957 states to 11957 states and 17323 transitions. [2023-11-25 00:01:57,610 INFO L78 Accepts]: Start accepts. Automaton has 11957 states and 17323 transitions. Word has length 125 [2023-11-25 00:01:57,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:01:57,611 INFO L495 AbstractCegarLoop]: Abstraction has 11957 states and 17323 transitions. [2023-11-25 00:01:57,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-25 00:01:57,611 INFO L276 IsEmpty]: Start isEmpty. Operand 11957 states and 17323 transitions. [2023-11-25 00:01:57,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-25 00:01:57,647 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:01:57,648 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:01:57,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-25 00:01:57,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-25 00:01:57,854 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:01:57,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:01:57,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1319090601, now seen corresponding path program 1 times [2023-11-25 00:01:57,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:01:57,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080658866] [2023-11-25 00:01:57,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:57,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:01:57,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-25 00:01:58,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:01:58,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080658866] [2023-11-25 00:01:58,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080658866] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:01:58,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810037723] [2023-11-25 00:01:58,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:01:58,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:01:58,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:01:58,349 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:01:58,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63425e2d-8853-4c31-93b7-db2f3ede3f46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-25 00:01:58,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:01:58,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-25 00:01:58,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:01:58,743 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 58 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-25 00:01:58,744 INFO L327 TraceCheckSpWp]: Computing backward predicates...