./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.07.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.07.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ --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 1937875315099b80c98271a1c221b9887fc0d74aa97933e0962b57c2a2a9f37a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:46:53,394 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:46:53,502 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:46:53,510 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:46:53,511 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:46:53,555 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:46:53,556 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:46:53,556 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:46:53,557 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:46:53,558 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:46:53,558 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:46:53,559 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:46:53,559 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:46:53,560 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:46:53,561 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:46:53,561 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:46:53,562 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:46:53,562 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:46:53,581 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:46:53,582 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:46:53,583 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:46:53,584 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:46:53,585 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:46:53,585 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:46:53,586 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:46:53,586 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:46:53,587 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:46:53,587 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:46:53,588 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:46:53,588 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:46:53,589 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:46:53,590 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:46:53,590 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:46:53,591 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:46:53,591 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:46:53,592 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:46:53,592 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:46:53,593 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:46:53,593 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:46:53,594 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:46:53,594 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:46:53,597 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:46:53,598 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:46:53,598 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:46:53,599 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:46:53,599 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_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1937875315099b80c98271a1c221b9887fc0d74aa97933e0962b57c2a2a9f37a [2023-11-19 04:46:53,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:46:53,935 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:46:53,938 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:46:53,939 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:46:53,940 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:46:53,942 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.07.cil-1.c [2023-11-19 04:46:56,948 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:46:57,728 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:46:57,729 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/sv-benchmarks/c/combinations/Problem05_label41+token_ring.07.cil-1.c [2023-11-19 04:46:57,802 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/data/75c63c24b/994f384ac0d54819b5aa79047dc82362/FLAGab859a084 [2023-11-19 04:46:57,815 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/data/75c63c24b/994f384ac0d54819b5aa79047dc82362 [2023-11-19 04:46:57,818 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:46:57,820 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:46:57,821 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:46:57,822 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:46:57,827 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:46:57,828 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:46:57" (1/1) ... [2023-11-19 04:46:57,829 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@555eff4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:57, skipping insertion in model container [2023-11-19 04:46:57,829 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:46:57" (1/1) ... [2023-11-19 04:46:58,136 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:47:00,384 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_500a0a9f-1e04-463f-9676-98a3bbab8dfb/sv-benchmarks/c/combinations/Problem05_label41+token_ring.07.cil-1.c[376251,376264] [2023-11-19 04:47:00,420 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_500a0a9f-1e04-463f-9676-98a3bbab8dfb/sv-benchmarks/c/combinations/Problem05_label41+token_ring.07.cil-1.c[383339,383352] [2023-11-19 04:47:00,678 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:47:00,696 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:47:01,976 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_500a0a9f-1e04-463f-9676-98a3bbab8dfb/sv-benchmarks/c/combinations/Problem05_label41+token_ring.07.cil-1.c[376251,376264] [2023-11-19 04:47:01,987 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_500a0a9f-1e04-463f-9676-98a3bbab8dfb/sv-benchmarks/c/combinations/Problem05_label41+token_ring.07.cil-1.c[383339,383352] [2023-11-19 04:47:02,003 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:47:02,077 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:47:02,078 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:02 WrapperNode [2023-11-19 04:47:02,079 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:47:02,080 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:47:02,081 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:47:02,081 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:47:02,088 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:02" (1/1) ... [2023-11-19 04:47:02,183 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:02" (1/1) ... [2023-11-19 04:47:02,779 INFO L138 Inliner]: procedures = 58, calls = 62, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 12928 [2023-11-19 04:47:02,780 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:47:02,780 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:47:02,781 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:47:02,781 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:47:02,790 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:02" (1/1) ... [2023-11-19 04:47:02,790 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:02" (1/1) ... [2023-11-19 04:47:02,962 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:02" (1/1) ... [2023-11-19 04:47:02,968 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:02" (1/1) ... [2023-11-19 04:47:03,193 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:02" (1/1) ... [2023-11-19 04:47:03,271 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:02" (1/1) ... [2023-11-19 04:47:03,290 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:02" (1/1) ... [2023-11-19 04:47:03,331 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:02" (1/1) ... [2023-11-19 04:47:03,445 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:47:03,446 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:47:03,446 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:47:03,447 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:47:03,447 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:02" (1/1) ... [2023-11-19 04:47:03,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:47:03,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:47:03,530 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:47:03,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:47:03,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:47:03,675 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-19 04:47:03,675 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-19 04:47:03,675 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-19 04:47:03,675 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-19 04:47:03,676 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-19 04:47:03,676 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-19 04:47:03,676 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-19 04:47:03,676 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-19 04:47:03,676 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-19 04:47:03,677 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-19 04:47:03,677 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-19 04:47:03,677 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-19 04:47:03,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:47:03,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:47:03,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:47:03,875 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:47:03,878 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:47:12,872 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:47:15,759 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:47:15,759 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-19 04:47:15,783 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:47:15 BoogieIcfgContainer [2023-11-19 04:47:15,784 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:47:15,786 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:47:15,787 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:47:15,790 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:47:15,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:46:57" (1/3) ... [2023-11-19 04:47:15,791 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2281bf60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:47:15, skipping insertion in model container [2023-11-19 04:47:15,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:47:02" (2/3) ... [2023-11-19 04:47:15,792 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2281bf60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:47:15, skipping insertion in model container [2023-11-19 04:47:15,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:47:15" (3/3) ... [2023-11-19 04:47:15,793 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label41+token_ring.07.cil-1.c [2023-11-19 04:47:15,813 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:47:15,814 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 04:47:15,920 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:47:15,927 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;@79c89024, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:47:15,928 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 04:47:15,944 INFO L276 IsEmpty]: Start isEmpty. Operand has 1784 states, 1754 states have (on average 1.9618015963511972) internal successors, (3441), 1757 states have internal predecessors, (3441), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-19 04:47:15,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-19 04:47:15,956 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:47:15,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:47:15,958 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:47:15,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:47:15,964 INFO L85 PathProgramCache]: Analyzing trace with hash -189785376, now seen corresponding path program 1 times [2023-11-19 04:47:15,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:47:15,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122076276] [2023-11-19 04:47:15,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:47:15,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:47:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:47:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:47:16,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:47:16,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122076276] [2023-11-19 04:47:16,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122076276] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:47:16,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:47:16,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:47:16,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937744726] [2023-11-19 04:47:16,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:47:16,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:47:16,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:47:16,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:47:16,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:47:16,554 INFO L87 Difference]: Start difference. First operand has 1784 states, 1754 states have (on average 1.9618015963511972) internal successors, (3441), 1757 states have internal predecessors, (3441), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 04:47:17,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:47:17,694 INFO L93 Difference]: Finished difference Result 3692 states and 7171 transitions. [2023-11-19 04:47:17,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:47:17,697 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2023-11-19 04:47:17,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:47:17,737 INFO L225 Difference]: With dead ends: 3692 [2023-11-19 04:47:17,737 INFO L226 Difference]: Without dead ends: 1907 [2023-11-19 04:47:17,753 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 [2023-11-19 04:47:17,759 INFO L413 NwaCegarLoop]: 3377 mSDtfsCounter, 3630 mSDsluCounter, 3299 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3630 SdHoareTripleChecker+Valid, 6676 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 04:47:17,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3630 Valid, 6676 Invalid, 660 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 04:47:17,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2023-11-19 04:47:17,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1906. [2023-11-19 04:47:17,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1854 states have (on average 1.9288025889967637) internal successors, (3576), 1857 states have internal predecessors, (3576), 38 states have call successors, (38), 12 states have call predecessors, (38), 12 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2023-11-19 04:47:17,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 3652 transitions. [2023-11-19 04:47:17,953 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 3652 transitions. Word has length 52 [2023-11-19 04:47:17,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:47:17,954 INFO L495 AbstractCegarLoop]: Abstraction has 1906 states and 3652 transitions. [2023-11-19 04:47:17,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 04:47:17,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 3652 transitions. [2023-11-19 04:47:17,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-19 04:47:17,964 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:47:17,965 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:47:17,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:47:17,966 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:47:17,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:47:17,967 INFO L85 PathProgramCache]: Analyzing trace with hash -675896856, now seen corresponding path program 1 times [2023-11-19 04:47:17,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:47:17,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933647148] [2023-11-19 04:47:17,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:47:17,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:47:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:47:18,300 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 04:47:18,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:47:18,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933647148] [2023-11-19 04:47:18,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933647148] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:47:18,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234588966] [2023-11-19 04:47:18,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:47:18,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:47:18,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:47:18,308 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:47:18,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:47:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:47:18,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:47:18,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:47:18,602 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-19 04:47:18,602 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:47:18,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234588966] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:47:18,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:47:18,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 04:47:18,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773655073] [2023-11-19 04:47:18,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:47:18,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:47:18,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:47:18,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:47:18,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:47:18,607 INFO L87 Difference]: Start difference. First operand 1906 states and 3652 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 04:47:19,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:47:19,122 INFO L93 Difference]: Finished difference Result 2419 states and 4413 transitions. [2023-11-19 04:47:19,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:47:19,123 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2023-11-19 04:47:19,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:47:19,139 INFO L225 Difference]: With dead ends: 2419 [2023-11-19 04:47:19,140 INFO L226 Difference]: Without dead ends: 2159 [2023-11-19 04:47:19,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:47:19,143 INFO L413 NwaCegarLoop]: 3265 mSDtfsCounter, 3443 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3443 SdHoareTripleChecker+Valid, 3423 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:47:19,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3443 Valid, 3423 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:47:19,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2159 states. [2023-11-19 04:47:19,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2159 to 2155. [2023-11-19 04:47:19,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2059 states have (on average 1.8790675084992714) internal successors, (3869), 2063 states have internal predecessors, (3869), 70 states have call successors, (70), 24 states have call predecessors, (70), 24 states have return successors, (70), 68 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-19 04:47:19,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 4009 transitions. [2023-11-19 04:47:19,228 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 4009 transitions. Word has length 102 [2023-11-19 04:47:19,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:47:19,229 INFO L495 AbstractCegarLoop]: Abstraction has 2155 states and 4009 transitions. [2023-11-19 04:47:19,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 04:47:19,229 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 4009 transitions. [2023-11-19 04:47:19,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-19 04:47:19,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:47:19,234 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:47:19,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:47:19,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:47:19,453 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:47:19,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:47:19,453 INFO L85 PathProgramCache]: Analyzing trace with hash 2034232934, now seen corresponding path program 1 times [2023-11-19 04:47:19,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:47:19,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142198129] [2023-11-19 04:47:19,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:47:19,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:47:19,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:47:19,720 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 04:47:19,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:47:19,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142198129] [2023-11-19 04:47:19,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142198129] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:47:19,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590825061] [2023-11-19 04:47:19,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:47:19,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:47:19,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:47:19,723 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:47:19,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:47:19,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:47:19,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:47:19,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:47:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-19 04:47:19,976 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:47:19,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590825061] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:47:19,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:47:19,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 04:47:19,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39131805] [2023-11-19 04:47:19,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:47:19,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:47:19,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:47:19,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:47:19,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:47:19,982 INFO L87 Difference]: Start difference. First operand 2155 states and 4009 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 04:47:20,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:47:20,516 INFO L93 Difference]: Finished difference Result 3160 states and 5492 transitions. [2023-11-19 04:47:20,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:47:20,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2023-11-19 04:47:20,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:47:20,536 INFO L225 Difference]: With dead ends: 3160 [2023-11-19 04:47:20,536 INFO L226 Difference]: Without dead ends: 2651 [2023-11-19 04:47:20,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:47:20,541 INFO L413 NwaCegarLoop]: 3263 mSDtfsCounter, 3446 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3446 SdHoareTripleChecker+Valid, 3421 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:47:20,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3446 Valid, 3421 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:47:20,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2023-11-19 04:47:20,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2645. [2023-11-19 04:47:20,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2463 states have (on average 1.8038976857490865) internal successors, (4443), 2469 states have internal predecessors, (4443), 132 states have call successors, (132), 48 states have call predecessors, (132), 48 states have return successors, (132), 128 states have call predecessors, (132), 132 states have call successors, (132) [2023-11-19 04:47:20,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 4707 transitions. [2023-11-19 04:47:20,688 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 4707 transitions. Word has length 102 [2023-11-19 04:47:20,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:47:20,689 INFO L495 AbstractCegarLoop]: Abstraction has 2645 states and 4707 transitions. [2023-11-19 04:47:20,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 04:47:20,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 4707 transitions. [2023-11-19 04:47:20,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-19 04:47:20,693 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:47:20,694 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:47:20,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:47:20,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:47:20,915 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:47:20,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:47:20,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1579390680, now seen corresponding path program 1 times [2023-11-19 04:47:20,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:47:20,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654739053] [2023-11-19 04:47:20,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:47:20,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:47:20,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:47:21,109 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 04:47:21,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:47:21,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654739053] [2023-11-19 04:47:21,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654739053] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:47:21,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432360791] [2023-11-19 04:47:21,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:47:21,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:47:21,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:47:21,118 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:47:21,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:47:21,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:47:21,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:47:21,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:47:21,396 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 04:47:21,396 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:47:21,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432360791] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:47:21,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:47:21,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 04:47:21,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961954632] [2023-11-19 04:47:21,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:47:21,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:47:21,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:47:21,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:47:21,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:47:21,399 INFO L87 Difference]: Start difference. First operand 2645 states and 4707 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 04:47:21,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:47:21,918 INFO L93 Difference]: Finished difference Result 4618 states and 7600 transitions. [2023-11-19 04:47:21,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:47:21,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2023-11-19 04:47:21,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:47:21,942 INFO L225 Difference]: With dead ends: 4618 [2023-11-19 04:47:21,943 INFO L226 Difference]: Without dead ends: 3619 [2023-11-19 04:47:21,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:47:21,949 INFO L413 NwaCegarLoop]: 3222 mSDtfsCounter, 3437 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3437 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:47:21,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3437 Valid, 3380 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:47:21,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2023-11-19 04:47:22,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 3609. [2023-11-19 04:47:22,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3609 states, 3259 states have (on average 1.708192697146364) internal successors, (5567), 3269 states have internal predecessors, (5567), 252 states have call successors, (252), 96 states have call predecessors, (252), 96 states have return successors, (252), 244 states have call predecessors, (252), 252 states have call successors, (252) [2023-11-19 04:47:22,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3609 states to 3609 states and 6071 transitions. [2023-11-19 04:47:22,103 INFO L78 Accepts]: Start accepts. Automaton has 3609 states and 6071 transitions. Word has length 102 [2023-11-19 04:47:22,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:47:22,104 INFO L495 AbstractCegarLoop]: Abstraction has 3609 states and 6071 transitions. [2023-11-19 04:47:22,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 04:47:22,104 INFO L276 IsEmpty]: Start isEmpty. Operand 3609 states and 6071 transitions. [2023-11-19 04:47:22,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-19 04:47:22,110 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:47:22,110 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:47:22,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:47:22,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:47:22,325 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:47:22,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:47:22,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1166044198, now seen corresponding path program 1 times [2023-11-19 04:47:22,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:47:22,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342540500] [2023-11-19 04:47:22,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:47:22,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:47:22,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:47:22,485 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 04:47:22,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:47:22,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342540500] [2023-11-19 04:47:22,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342540500] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:47:22,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004268144] [2023-11-19 04:47:22,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:47:22,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:47:22,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:47:22,488 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:47:22,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:47:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:47:22,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:47:22,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:47:22,827 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:47:22,828 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:47:22,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004268144] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:47:22,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:47:22,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 04:47:22,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041054293] [2023-11-19 04:47:22,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:47:22,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:47:22,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:47:22,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:47:22,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:47:22,831 INFO L87 Difference]: Start difference. First operand 3609 states and 6071 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 04:47:23,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:47:23,407 INFO L93 Difference]: Finished difference Result 7486 states and 11716 transitions. [2023-11-19 04:47:23,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:47:23,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2023-11-19 04:47:23,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:47:23,442 INFO L225 Difference]: With dead ends: 7486 [2023-11-19 04:47:23,443 INFO L226 Difference]: Without dead ends: 5523 [2023-11-19 04:47:23,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:47:23,452 INFO L413 NwaCegarLoop]: 3222 mSDtfsCounter, 3431 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3431 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:47:23,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3431 Valid, 3380 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:47:23,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5523 states. [2023-11-19 04:47:23,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5523 to 5505. [2023-11-19 04:47:23,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5505 states, 4827 states have (on average 1.6090739589807335) internal successors, (7767), 4845 states have internal predecessors, (7767), 484 states have call successors, (484), 192 states have call predecessors, (484), 192 states have return successors, (484), 468 states have call predecessors, (484), 484 states have call successors, (484) [2023-11-19 04:47:23,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5505 states to 5505 states and 8735 transitions. [2023-11-19 04:47:23,717 INFO L78 Accepts]: Start accepts. Automaton has 5505 states and 8735 transitions. Word has length 102 [2023-11-19 04:47:23,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:47:23,718 INFO L495 AbstractCegarLoop]: Abstraction has 5505 states and 8735 transitions. [2023-11-19 04:47:23,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 04:47:23,719 INFO L276 IsEmpty]: Start isEmpty. Operand 5505 states and 8735 transitions. [2023-11-19 04:47:23,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-19 04:47:23,727 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:47:23,727 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:47:23,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 04:47:23,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:47:23,941 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:47:23,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:47:23,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1764361636, now seen corresponding path program 1 times [2023-11-19 04:47:23,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:47:23,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027926664] [2023-11-19 04:47:23,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:47:23,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:47:23,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:47:24,062 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-19 04:47:24,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:47:24,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027926664] [2023-11-19 04:47:24,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027926664] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:47:24,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:47:24,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:47:24,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262285233] [2023-11-19 04:47:24,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:47:24,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:47:24,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:47:24,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:47:24,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:47:24,065 INFO L87 Difference]: Start difference. First operand 5505 states and 8735 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 04:47:24,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:47:24,761 INFO L93 Difference]: Finished difference Result 8563 states and 13184 transitions. [2023-11-19 04:47:24,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:47:24,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 102 [2023-11-19 04:47:24,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:47:24,805 INFO L225 Difference]: With dead ends: 8563 [2023-11-19 04:47:24,805 INFO L226 Difference]: Without dead ends: 6593 [2023-11-19 04:47:24,813 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 [2023-11-19 04:47:24,814 INFO L413 NwaCegarLoop]: 3316 mSDtfsCounter, 89 mSDsluCounter, 3230 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 6546 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:47:24,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 6546 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 04:47:24,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6593 states. [2023-11-19 04:47:25,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6593 to 6273. [2023-11-19 04:47:25,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6273 states, 5563 states have (on average 1.6061477619989215) internal successors, (8935), 5581 states have internal predecessors, (8935), 500 states have call successors, (500), 208 states have call predecessors, (500), 208 states have return successors, (500), 484 states have call predecessors, (500), 500 states have call successors, (500) [2023-11-19 04:47:25,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6273 states to 6273 states and 9935 transitions. [2023-11-19 04:47:25,098 INFO L78 Accepts]: Start accepts. Automaton has 6273 states and 9935 transitions. Word has length 102 [2023-11-19 04:47:25,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:47:25,099 INFO L495 AbstractCegarLoop]: Abstraction has 6273 states and 9935 transitions. [2023-11-19 04:47:25,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 04:47:25,099 INFO L276 IsEmpty]: Start isEmpty. Operand 6273 states and 9935 transitions. [2023-11-19 04:47:25,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-19 04:47:25,113 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:47:25,114 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:47:25,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 04:47:25,114 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:47:25,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:47:25,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1683746769, now seen corresponding path program 1 times [2023-11-19 04:47:25,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:47:25,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573055107] [2023-11-19 04:47:25,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:47:25,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:47:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:47:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-19 04:47:25,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:47:25,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573055107] [2023-11-19 04:47:25,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573055107] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:47:25,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:47:25,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:47:25,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173641488] [2023-11-19 04:47:25,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:47:25,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:47:25,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:47:25,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:47:25,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:47:25,217 INFO L87 Difference]: Start difference. First operand 6273 states and 9935 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 04:47:25,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:47:25,924 INFO L93 Difference]: Finished difference Result 15382 states and 23252 transitions. [2023-11-19 04:47:25,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:47:25,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 138 [2023-11-19 04:47:25,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:47:25,979 INFO L225 Difference]: With dead ends: 15382 [2023-11-19 04:47:25,979 INFO L226 Difference]: Without dead ends: 10755 [2023-11-19 04:47:25,997 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 [2023-11-19 04:47:25,998 INFO L413 NwaCegarLoop]: 3224 mSDtfsCounter, 3434 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3434 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:47:25,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3434 Valid, 3382 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:47:26,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10755 states. [2023-11-19 04:47:26,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10755 to 10705. [2023-11-19 04:47:26,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10705 states, 9323 states have (on average 1.5315885444599378) internal successors, (14279), 9357 states have internal predecessors, (14279), 964 states have call successors, (964), 416 states have call predecessors, (964), 416 states have return successors, (964), 932 states have call predecessors, (964), 964 states have call successors, (964) [2023-11-19 04:47:26,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10705 states to 10705 states and 16207 transitions. [2023-11-19 04:47:26,693 INFO L78 Accepts]: Start accepts. Automaton has 10705 states and 16207 transitions. Word has length 138 [2023-11-19 04:47:26,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:47:26,694 INFO L495 AbstractCegarLoop]: Abstraction has 10705 states and 16207 transitions. [2023-11-19 04:47:26,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 04:47:26,695 INFO L276 IsEmpty]: Start isEmpty. Operand 10705 states and 16207 transitions. [2023-11-19 04:47:26,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-19 04:47:26,728 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:47:26,728 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:47:26,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 04:47:26,729 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:47:26,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:47:26,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1652425477, now seen corresponding path program 1 times [2023-11-19 04:47:26,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:47:26,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818869258] [2023-11-19 04:47:26,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:47:26,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:47:26,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:47:26,850 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-19 04:47:26,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:47:26,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818869258] [2023-11-19 04:47:26,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818869258] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:47:26,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:47:26,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:47:26,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43554518] [2023-11-19 04:47:26,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:47:26,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:47:26,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:47:26,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:47:26,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:47:26,854 INFO L87 Difference]: Start difference. First operand 10705 states and 16207 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 04:47:28,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:47:28,030 INFO L93 Difference]: Finished difference Result 28534 states and 42036 transitions. [2023-11-19 04:47:28,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:47:28,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 138 [2023-11-19 04:47:28,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:47:28,112 INFO L225 Difference]: With dead ends: 28534 [2023-11-19 04:47:28,113 INFO L226 Difference]: Without dead ends: 19475 [2023-11-19 04:47:28,151 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 [2023-11-19 04:47:28,152 INFO L413 NwaCegarLoop]: 3224 mSDtfsCounter, 3436 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3436 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:47:28,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3436 Valid, 3382 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:47:28,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19475 states. [2023-11-19 04:47:29,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19475 to 19377. [2023-11-19 04:47:29,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19377 states, 16683 states have (on average 1.4773721752682372) internal successors, (24647), 16749 states have internal predecessors, (24647), 1860 states have call successors, (1860), 832 states have call predecessors, (1860), 832 states have return successors, (1860), 1796 states have call predecessors, (1860), 1860 states have call successors, (1860) [2023-11-19 04:47:29,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19377 states to 19377 states and 28367 transitions. [2023-11-19 04:47:29,325 INFO L78 Accepts]: Start accepts. Automaton has 19377 states and 28367 transitions. Word has length 138 [2023-11-19 04:47:29,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:47:29,327 INFO L495 AbstractCegarLoop]: Abstraction has 19377 states and 28367 transitions. [2023-11-19 04:47:29,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 04:47:29,327 INFO L276 IsEmpty]: Start isEmpty. Operand 19377 states and 28367 transitions. [2023-11-19 04:47:29,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-19 04:47:29,384 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:47:29,388 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:47:29,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 04:47:29,388 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:47:29,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:47:29,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1480620844, now seen corresponding path program 1 times [2023-11-19 04:47:29,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:47:29,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925903094] [2023-11-19 04:47:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:47:29,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:47:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:47:29,516 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-19 04:47:29,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:47:29,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925903094] [2023-11-19 04:47:29,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925903094] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:47:29,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:47:29,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:47:29,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213243782] [2023-11-19 04:47:29,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:47:29,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:47:29,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:47:29,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:47:29,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:47:29,520 INFO L87 Difference]: Start difference. First operand 19377 states and 28367 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 04:47:30,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:47:30,902 INFO L93 Difference]: Finished difference Result 54262 states and 78420 transitions. [2023-11-19 04:47:30,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:47:30,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 138 [2023-11-19 04:47:30,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:47:31,037 INFO L225 Difference]: With dead ends: 54262 [2023-11-19 04:47:31,037 INFO L226 Difference]: Without dead ends: 36531 [2023-11-19 04:47:31,090 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 [2023-11-19 04:47:31,093 INFO L413 NwaCegarLoop]: 3232 mSDtfsCounter, 3439 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3439 SdHoareTripleChecker+Valid, 3390 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:47:31,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3439 Valid, 3390 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:47:31,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36531 states. [2023-11-19 04:47:32,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36531 to 36337. [2023-11-19 04:47:32,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36337 states, 31083 states have (on average 1.439468519769649) internal successors, (44743), 31213 states have internal predecessors, (44743), 3588 states have call successors, (3588), 1664 states have call predecessors, (3588), 1664 states have return successors, (3588), 3460 states have call predecessors, (3588), 3588 states have call successors, (3588) [2023-11-19 04:47:32,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36337 states to 36337 states and 51919 transitions. [2023-11-19 04:47:32,665 INFO L78 Accepts]: Start accepts. Automaton has 36337 states and 51919 transitions. Word has length 138 [2023-11-19 04:47:32,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:47:32,666 INFO L495 AbstractCegarLoop]: Abstraction has 36337 states and 51919 transitions. [2023-11-19 04:47:32,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 04:47:32,666 INFO L276 IsEmpty]: Start isEmpty. Operand 36337 states and 51919 transitions. [2023-11-19 04:47:32,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-19 04:47:32,775 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:47:32,775 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:47:32,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 04:47:32,775 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:47:32,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:47:32,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1919873537, now seen corresponding path program 1 times [2023-11-19 04:47:32,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:47:32,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932980169] [2023-11-19 04:47:32,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:47:32,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:47:32,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:47:33,730 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 12 proven. 50 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-19 04:47:33,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:47:33,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932980169] [2023-11-19 04:47:33,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932980169] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:47:33,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918029719] [2023-11-19 04:47:33,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:47:33,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:47:33,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:47:33,733 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:47:33,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_500a0a9f-1e04-463f-9676-98a3bbab8dfb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:47:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:47:33,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 1008 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-19 04:47:34,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:47:34,437 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 72 proven. 32 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-19 04:47:34,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:47:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 59 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-19 04:47:34,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918029719] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:47:34,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1522110473] [2023-11-19 04:47:34,988 INFO L159 IcfgInterpreter]: Started Sifa with 82 locations of interest [2023-11-19 04:47:34,988 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:47:34,992 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:47:34,998 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:47:34,998 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs