./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2 --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 ae51dc9203c351522c25ee3116b2cda704928bb61769972b6b90792bfdf57f19 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:37:48,449 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:37:48,554 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:37:48,561 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:37:48,562 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:37:48,601 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:37:48,604 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:37:48,605 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:37:48,606 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:37:48,607 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:37:48,607 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:37:48,608 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:37:48,608 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:37:48,609 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:37:48,612 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:37:48,613 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:37:48,613 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:37:48,614 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:37:48,614 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:37:48,615 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:37:48,615 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:37:48,618 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:37:48,619 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:37:48,620 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:37:48,620 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:37:48,620 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:37:48,621 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:37:48,621 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:37:48,621 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:37:48,621 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:37:48,622 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:37:48,622 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:37:48,622 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:37:48,623 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:37:48,623 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:37:48,623 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:37:48,624 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:37:48,624 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:37:48,625 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:37:48,626 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:37:48,626 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:37:48,627 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:37:48,627 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:37:48,627 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:37:48,628 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:37:48,628 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:37:48,628 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:37:48,628 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_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ae51dc9203c351522c25ee3116b2cda704928bb61769972b6b90792bfdf57f19 [2024-11-02 12:37:48,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:37:49,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:37:49,021 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:37:49,024 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:37:49,025 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:37:49,026 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c Unable to find full path for "g++" [2024-11-02 12:37:51,138 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:37:51,332 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:37:51,333 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c [2024-11-02 12:37:51,341 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/data/958636728/c22ee5937b96400bbb7992f557d5c619/FLAG9786e991d [2024-11-02 12:37:51,361 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/data/958636728/c22ee5937b96400bbb7992f557d5c619 [2024-11-02 12:37:51,365 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:37:51,367 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:37:51,369 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:37:51,369 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:37:51,375 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:37:51,376 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:37:51" (1/1) ... [2024-11-02 12:37:51,377 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42326988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:51, skipping insertion in model container [2024-11-02 12:37:51,377 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:37:51" (1/1) ... [2024-11-02 12:37:51,404 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:37:51,627 WARN L251 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_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c[318,331] [2024-11-02 12:37:51,643 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:37:51,652 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:37:51,662 WARN L251 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_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c[318,331] [2024-11-02 12:37:51,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:37:51,683 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:37:51,684 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:51 WrapperNode [2024-11-02 12:37:51,684 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:37:51,685 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:37:51,685 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:37:51,686 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:37:51,694 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:51" (1/1) ... [2024-11-02 12:37:51,703 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:51" (1/1) ... [2024-11-02 12:37:51,720 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 40 [2024-11-02 12:37:51,720 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:37:51,721 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:37:51,721 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:37:51,722 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:37:51,731 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:51" (1/1) ... [2024-11-02 12:37:51,731 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:51" (1/1) ... [2024-11-02 12:37:51,732 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:51" (1/1) ... [2024-11-02 12:37:51,733 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:51" (1/1) ... [2024-11-02 12:37:51,736 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:51" (1/1) ... [2024-11-02 12:37:51,739 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:51" (1/1) ... [2024-11-02 12:37:51,740 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:51" (1/1) ... [2024-11-02 12:37:51,741 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:51" (1/1) ... [2024-11-02 12:37:51,743 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:37:51,744 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:37:51,744 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:37:51,744 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:37:51,745 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:51" (1/1) ... [2024-11-02 12:37:51,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:37:51,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:37:51,776 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:37:51,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:37:51,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:37:51,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:37:51,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:37:51,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:37:51,881 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:37:51,882 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:37:52,000 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-11-02 12:37:52,000 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:37:52,048 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:37:52,048 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-02 12:37:52,049 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:37:52 BoogieIcfgContainer [2024-11-02 12:37:52,049 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:37:52,052 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:37:52,053 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:37:52,056 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:37:52,057 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:37:51" (1/3) ... [2024-11-02 12:37:52,057 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad267fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:37:52, skipping insertion in model container [2024-11-02 12:37:52,058 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:51" (2/3) ... [2024-11-02 12:37:52,058 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad267fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:37:52, skipping insertion in model container [2024-11-02 12:37:52,058 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:37:52" (3/3) ... [2024-11-02 12:37:52,060 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_7.c [2024-11-02 12:37:52,079 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:37:52,080 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:37:52,157 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:37:52,166 INFO L333 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, 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;@703036a6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:37:52,166 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:37:52,171 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:52,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-02 12:37:52,179 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:52,180 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-02 12:37:52,180 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:37:52,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:52,188 INFO L85 PathProgramCache]: Analyzing trace with hash 73603151, now seen corresponding path program 1 times [2024-11-02 12:37:52,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:52,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106056596] [2024-11-02 12:37:52,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:52,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:52,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:37:52,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:37:52,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106056596] [2024-11-02 12:37:52,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106056596] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:37:52,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:37:52,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:37:52,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810297996] [2024-11-02 12:37:52,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:37:52,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:37:52,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:37:52,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:37:52,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:37:52,437 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:52,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:37:52,466 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2024-11-02 12:37:52,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:37:52,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-02 12:37:52,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:37:52,481 INFO L225 Difference]: With dead ends: 15 [2024-11-02 12:37:52,482 INFO L226 Difference]: Without dead ends: 7 [2024-11-02 12:37:52,484 INFO L431 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 [2024-11-02 12:37:52,488 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:37:52,489 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:37:52,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2024-11-02 12:37:52,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2024-11-02 12:37:52,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:52,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2024-11-02 12:37:52,518 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2024-11-02 12:37:52,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:37:52,518 INFO L471 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2024-11-02 12:37:52,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:52,519 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2024-11-02 12:37:52,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-02 12:37:52,519 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:52,520 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-02 12:37:52,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:37:52,520 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:37:52,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:52,521 INFO L85 PathProgramCache]: Analyzing trace with hash -2011378392, now seen corresponding path program 1 times [2024-11-02 12:37:52,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:52,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412057344] [2024-11-02 12:37:52,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:52,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:37:52,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:37:52,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412057344] [2024-11-02 12:37:52,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412057344] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:37:52,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131570924] [2024-11-02 12:37:52,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:52,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:52,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:37:52,640 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:37:52,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:37:52,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:52,711 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-02 12:37:52,719 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:37:52,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:37:52,822 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:37:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:37:53,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131570924] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-02 12:37:53,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-02 12:37:53,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 6 [2024-11-02 12:37:53,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156357642] [2024-11-02 12:37:53,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:37:53,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:37:53,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:37:53,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:37:53,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:37:53,070 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:53,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:37:53,095 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2024-11-02 12:37:53,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:37:53,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-02 12:37:53,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:37:53,098 INFO L225 Difference]: With dead ends: 11 [2024-11-02 12:37:53,098 INFO L226 Difference]: Without dead ends: 8 [2024-11-02 12:37:53,099 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:37:53,101 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:37:53,102 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:37:53,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2024-11-02 12:37:53,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2024-11-02 12:37:53,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:53,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2024-11-02 12:37:53,106 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2024-11-02 12:37:53,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:37:53,107 INFO L471 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2024-11-02 12:37:53,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:53,108 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2024-11-02 12:37:53,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-02 12:37:53,109 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:53,109 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:37:53,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 12:37:53,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:53,310 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:37:53,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:53,315 INFO L85 PathProgramCache]: Analyzing trace with hash 2071138276, now seen corresponding path program 1 times [2024-11-02 12:37:53,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:53,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281566774] [2024-11-02 12:37:53,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:53,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:53,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:37:53,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:37:53,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281566774] [2024-11-02 12:37:53,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281566774] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:37:53,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49857004] [2024-11-02 12:37:53,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:53,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:53,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:37:53,497 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:37:53,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:37:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:53,557 INFO L255 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-02 12:37:53,559 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:37:53,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:37:53,620 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:37:53,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:37:53,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49857004] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:37:53,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [83396337] [2024-11-02 12:37:53,807 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-02 12:37:53,807 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:37:53,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:37:53,820 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:37:53,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:37:54,101 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:37:54,145 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '155#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-02 12:37:54,145 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:37:54,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:37:54,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 9 [2024-11-02 12:37:54,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44124604] [2024-11-02 12:37:54,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:37:54,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-02 12:37:54,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:37:54,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-02 12:37:54,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-02 12:37:54,148 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:54,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:37:54,211 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2024-11-02 12:37:54,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 12:37:54,213 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-02 12:37:54,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:37:54,214 INFO L225 Difference]: With dead ends: 17 [2024-11-02 12:37:54,214 INFO L226 Difference]: Without dead ends: 12 [2024-11-02 12:37:54,214 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-11-02 12:37:54,215 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:37:54,218 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:37:54,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-11-02 12:37:54,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-11-02 12:37:54,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:54,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2024-11-02 12:37:54,224 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 7 [2024-11-02 12:37:54,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:37:54,224 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2024-11-02 12:37:54,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:54,225 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2024-11-02 12:37:54,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-02 12:37:54,226 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:54,226 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2024-11-02 12:37:54,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 12:37:54,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:54,428 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:37:54,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:54,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1333266159, now seen corresponding path program 2 times [2024-11-02 12:37:54,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:54,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137996301] [2024-11-02 12:37:54,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:54,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:54,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:54,869 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:37:54,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:37:54,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137996301] [2024-11-02 12:37:54,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137996301] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:37:54,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522960922] [2024-11-02 12:37:54,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:37:54,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:54,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:37:54,876 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:37:54,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:37:54,934 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-02 12:37:54,934 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:37:54,935 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-02 12:37:54,937 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:37:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 12:37:54,981 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:37:55,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 12:37:55,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522960922] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:37:55,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [573424915] [2024-11-02 12:37:55,126 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-02 12:37:55,127 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:37:55,128 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:37:55,128 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:37:55,128 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:37:55,254 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:37:55,301 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '283#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-02 12:37:55,301 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:37:55,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:37:55,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 13 [2024-11-02 12:37:55,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115548457] [2024-11-02 12:37:55,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:37:55,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-02 12:37:55,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:37:55,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-02 12:37:55,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2024-11-02 12:37:55,303 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:55,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:37:55,396 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2024-11-02 12:37:55,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-02 12:37:55,397 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-02 12:37:55,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:37:55,397 INFO L225 Difference]: With dead ends: 25 [2024-11-02 12:37:55,398 INFO L226 Difference]: Without dead ends: 17 [2024-11-02 12:37:55,398 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2024-11-02 12:37:55,399 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:37:55,400 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:37:55,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-02 12:37:55,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-02 12:37:55,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:55,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2024-11-02 12:37:55,405 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 11 [2024-11-02 12:37:55,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:37:55,405 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2024-11-02 12:37:55,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:55,405 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2024-11-02 12:37:55,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-02 12:37:55,406 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:55,406 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2024-11-02 12:37:55,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-02 12:37:55,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:55,610 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:37:55,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:55,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1477417149, now seen corresponding path program 3 times [2024-11-02 12:37:55,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:55,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064307521] [2024-11-02 12:37:55,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:55,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:56,099 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:37:56,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:37:56,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064307521] [2024-11-02 12:37:56,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064307521] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:37:56,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808992531] [2024-11-02 12:37:56,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-02 12:37:56,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:56,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:37:56,103 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:37:56,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:37:56,156 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-02 12:37:56,156 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:37:56,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-02 12:37:56,161 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:37:56,262 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:37:56,263 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:37:57,423 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:37:57,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808992531] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:37:57,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [377853251] [2024-11-02 12:37:57,426 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-02 12:37:57,427 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:37:57,427 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:37:57,427 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:37:57,428 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:37:57,522 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:37:57,572 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '486#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-02 12:37:57,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:37:57,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:37:57,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2024-11-02 12:37:57,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385294678] [2024-11-02 12:37:57,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:37:57,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-02 12:37:57,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:37:57,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-02 12:37:57,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=517, Unknown=0, NotChecked=0, Total=870 [2024-11-02 12:37:57,575 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:57,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:37:57,638 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2024-11-02 12:37:57,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-02 12:37:57,639 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-02 12:37:57,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:37:57,640 INFO L225 Difference]: With dead ends: 27 [2024-11-02 12:37:57,640 INFO L226 Difference]: Without dead ends: 24 [2024-11-02 12:37:57,640 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=353, Invalid=517, Unknown=0, NotChecked=0, Total=870 [2024-11-02 12:37:57,642 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:37:57,643 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:37:57,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-02 12:37:57,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-02 12:37:57,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:57,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-11-02 12:37:57,648 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 16 [2024-11-02 12:37:57,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:37:57,648 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-11-02 12:37:57,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:57,649 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-11-02 12:37:57,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-02 12:37:57,649 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:57,650 INFO L215 NwaCegarLoop]: trace histogram [12, 6, 1, 1, 1, 1, 1] [2024-11-02 12:37:57,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-02 12:37:57,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:57,851 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:37:57,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:57,851 INFO L85 PathProgramCache]: Analyzing trace with hash -194483153, now seen corresponding path program 4 times [2024-11-02 12:37:57,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:57,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915324203] [2024-11-02 12:37:57,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:57,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:58,202 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-02 12:37:58,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:37:58,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915324203] [2024-11-02 12:37:58,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915324203] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:37:58,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470903927] [2024-11-02 12:37:58,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-02 12:37:58,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:37:58,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:37:58,206 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:37:58,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-02 12:37:58,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:37:58,272 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-02 12:37:58,276 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:37:58,338 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-02 12:37:58,338 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:37:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-02 12:37:58,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470903927] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:37:58,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [408244447] [2024-11-02 12:37:58,594 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-02 12:37:58,594 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:37:58,594 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:37:58,594 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:37:58,594 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:37:58,684 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:37:58,721 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '730#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-02 12:37:58,721 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:37:58,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:37:58,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-11-02 12:37:58,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143242524] [2024-11-02 12:37:58,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:37:58,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-02 12:37:58,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:37:58,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-02 12:37:58,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2024-11-02 12:37:58,724 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:58,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:37:58,763 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2024-11-02 12:37:58,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-02 12:37:58,764 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-02 12:37:58,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:37:58,765 INFO L225 Difference]: With dead ends: 49 [2024-11-02 12:37:58,765 INFO L226 Difference]: Without dead ends: 33 [2024-11-02 12:37:58,765 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2024-11-02 12:37:58,766 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:37:58,767 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:37:58,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-02 12:37:58,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-02 12:37:58,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:58,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-11-02 12:37:58,772 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 23 [2024-11-02 12:37:58,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:37:58,773 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-11-02 12:37:58,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:37:58,773 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-11-02 12:37:58,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-02 12:37:58,774 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:37:58,774 INFO L215 NwaCegarLoop]: trace histogram [15, 12, 1, 1, 1, 1, 1] [2024-11-02 12:37:58,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-02 12:37:58,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-02 12:37:58,974 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:37:58,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:37:58,976 INFO L85 PathProgramCache]: Analyzing trace with hash -551620536, now seen corresponding path program 5 times [2024-11-02 12:37:58,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:37:58,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073280095] [2024-11-02 12:37:58,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:37:58,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:37:59,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:38:01,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:38:01,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073280095] [2024-11-02 12:38:01,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073280095] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:38:01,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990895512] [2024-11-02 12:38:01,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:38:01,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:38:01,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:38:01,174 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:38:01,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-02 12:38:01,253 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-02 12:38:01,254 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:38:01,255 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-02 12:38:01,260 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:38:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-02 12:38:01,794 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:38:02,869 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-02 12:38:02,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990895512] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:38:02,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2089752710] [2024-11-02 12:38:02,872 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-02 12:38:02,872 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:38:02,873 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:38:02,873 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:38:02,873 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:38:02,953 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:38:03,053 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1135#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-02 12:38:03,053 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:38:03,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:38:03,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 17, 17] total 62 [2024-11-02 12:38:03,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64244969] [2024-11-02 12:38:03,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:38:03,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-02 12:38:03,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:38:03,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-02 12:38:03,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1310, Invalid=2980, Unknown=0, NotChecked=0, Total=4290 [2024-11-02 12:38:03,060 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 63 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 62 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:38:04,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:38:04,146 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2024-11-02 12:38:04,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-02 12:38:04,147 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 62 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-02 12:38:04,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:38:04,148 INFO L225 Difference]: With dead ends: 67 [2024-11-02 12:38:04,148 INFO L226 Difference]: Without dead ends: 51 [2024-11-02 12:38:04,152 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1549 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2404, Invalid=5252, Unknown=0, NotChecked=0, Total=7656 [2024-11-02 12:38:04,153 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:38:04,154 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:38:04,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-02 12:38:04,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-02 12:38:04,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:38:04,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2024-11-02 12:38:04,167 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 32 [2024-11-02 12:38:04,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:38:04,167 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2024-11-02 12:38:04,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 62 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:38:04,168 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2024-11-02 12:38:04,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-02 12:38:04,168 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:38:04,169 INFO L215 NwaCegarLoop]: trace histogram [32, 13, 1, 1, 1, 1, 1] [2024-11-02 12:38:04,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-02 12:38:04,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:38:04,369 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:38:04,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:38:04,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1316707613, now seen corresponding path program 6 times [2024-11-02 12:38:04,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:38:04,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804516234] [2024-11-02 12:38:04,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:04,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:38:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:08,982 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 0 proven. 619 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:38:08,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:38:08,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804516234] [2024-11-02 12:38:08,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804516234] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:38:08,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10278124] [2024-11-02 12:38:08,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-02 12:38:08,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:38:08,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:38:08,985 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:38:08,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-02 12:38:09,098 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-02 12:38:09,099 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:38:09,101 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-02 12:38:09,113 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:38:10,832 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-02 12:38:10,833 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:38:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-02 12:38:14,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10278124] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:38:14,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1301289739] [2024-11-02 12:38:14,038 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-02 12:38:14,038 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:38:14,038 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:38:14,039 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:38:14,039 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:38:14,101 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:38:14,222 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1815#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-02 12:38:14,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:38:14,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:38:14,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 34, 34] total 113 [2024-11-02 12:38:14,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338895081] [2024-11-02 12:38:14,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:38:14,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2024-11-02 12:38:14,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:38:14,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2024-11-02 12:38:14,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5029, Invalid=8543, Unknown=0, NotChecked=0, Total=13572 [2024-11-02 12:38:14,229 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 114 states, 114 states have (on average 1.0526315789473684) internal successors, (120), 113 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:38:16,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:38:16,514 INFO L93 Difference]: Finished difference Result 103 states and 139 transitions. [2024-11-02 12:38:16,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2024-11-02 12:38:16,515 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.0526315789473684) internal successors, (120), 113 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-11-02 12:38:16,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:38:16,516 INFO L225 Difference]: With dead ends: 103 [2024-11-02 12:38:16,516 INFO L226 Difference]: Without dead ends: 86 [2024-11-02 12:38:16,520 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2908 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=7817, Invalid=14833, Unknown=0, NotChecked=0, Total=22650 [2024-11-02 12:38:16,521 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:38:16,521 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:38:16,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-02 12:38:16,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2024-11-02 12:38:16,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:38:16,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2024-11-02 12:38:16,537 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 50 [2024-11-02 12:38:16,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:38:16,537 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2024-11-02 12:38:16,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.0526315789473684) internal successors, (120), 113 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:38:16,538 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2024-11-02 12:38:16,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-02 12:38:16,542 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:38:16,542 INFO L215 NwaCegarLoop]: trace histogram [66, 14, 1, 1, 1, 1, 1] [2024-11-02 12:38:16,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-02 12:38:16,746 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e76889e-463b-4bb4-ae7f-2f7713fa46ae/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:38:16,746 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:38:16,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:38:16,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1290366033, now seen corresponding path program 7 times [2024-11-02 12:38:16,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:38:16,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35844736] [2024-11-02 12:38:16,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:16,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:38:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat