./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.07.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.07.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 54f1be55645106b43145d214f59b6f833268ce7c7f84e399c536bf03a2c9679b --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 13:10:13,495 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:10:13,563 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 13:10:13,568 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:10:13,569 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:10:13,592 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:10:13,593 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:10:13,594 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:10:13,594 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:10:13,595 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:10:13,596 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:10:13,596 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:10:13,597 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:10:13,597 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 13:10:13,598 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:10:13,598 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:10:13,599 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 13:10:13,599 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 13:10:13,599 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:10:13,600 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 13:10:13,600 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 13:10:13,601 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 13:10:13,602 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:10:13,602 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 13:10:13,603 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 13:10:13,612 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 13:10:13,612 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 13:10:13,613 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:10:13,613 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 13:10:13,613 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:10:13,613 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 13:10:13,614 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 13:10:13,614 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 13:10:13,614 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:10:13,615 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:10:13,615 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:10:13,615 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:10:13,615 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:10:13,615 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:10:13,616 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:10:13,616 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 13:10:13,616 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 13:10:13,616 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 13:10:13,616 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:10:13,617 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 13:10:13,617 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:10:13,617 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:10:13,617 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_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54f1be55645106b43145d214f59b6f833268ce7c7f84e399c536bf03a2c9679b [2023-12-02 13:10:13,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:10:13,838 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:10:13,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:10:13,842 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:10:13,842 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:10:13,843 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.07.cil-1.c [2023-12-02 13:10:16,519 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:10:17,152 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:10:17,153 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/sv-benchmarks/c/combinations/Problem05_label43+token_ring.07.cil-1.c [2023-12-02 13:10:17,201 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/data/5a73fc253/10ea1ad2e80f453c83ad9f6f5b7c8e92/FLAGac7d12d88 [2023-12-02 13:10:17,215 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/data/5a73fc253/10ea1ad2e80f453c83ad9f6f5b7c8e92 [2023-12-02 13:10:17,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:10:17,219 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:10:17,220 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:10:17,220 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:10:17,225 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:10:17,226 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:10:17" (1/1) ... [2023-12-02 13:10:17,227 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ebaec10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:10:17, skipping insertion in model container [2023-12-02 13:10:17,227 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:10:17" (1/1) ... [2023-12-02 13:10:17,460 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:10:19,165 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/sv-benchmarks/c/combinations/Problem05_label43+token_ring.07.cil-1.c[381679,381692] [2023-12-02 13:10:19,190 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/sv-benchmarks/c/combinations/Problem05_label43+token_ring.07.cil-1.c[383339,383352] [2023-12-02 13:10:19,434 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:10:19,444 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:10:20,416 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/sv-benchmarks/c/combinations/Problem05_label43+token_ring.07.cil-1.c[381679,381692] [2023-12-02 13:10:20,420 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/sv-benchmarks/c/combinations/Problem05_label43+token_ring.07.cil-1.c[383339,383352] [2023-12-02 13:10:20,437 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:10:20,511 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:10:20,511 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:10:20 WrapperNode [2023-12-02 13:10:20,512 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:10:20,513 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:10:20,513 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:10:20,513 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:10:20,520 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:10:20" (1/1) ... [2023-12-02 13:10:20,616 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:10:20" (1/1) ... [2023-12-02 13:10:21,015 INFO L138 Inliner]: procedures = 58, calls = 62, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 12928 [2023-12-02 13:10:21,015 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:10:21,016 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:10:21,016 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:10:21,016 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:10:21,031 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:10:20" (1/1) ... [2023-12-02 13:10:21,031 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:10:20" (1/1) ... [2023-12-02 13:10:21,079 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:10:20" (1/1) ... [2023-12-02 13:10:21,079 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:10:20" (1/1) ... [2023-12-02 13:10:21,266 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:10:20" (1/1) ... [2023-12-02 13:10:21,307 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:10:20" (1/1) ... [2023-12-02 13:10:21,327 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:10:20" (1/1) ... [2023-12-02 13:10:21,346 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:10:20" (1/1) ... [2023-12-02 13:10:21,389 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:10:21,390 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:10:21,390 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:10:21,390 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:10:21,390 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:10:20" (1/1) ... [2023-12-02 13:10:21,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:10:21,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:10:21,418 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:10:21,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:10:21,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 13:10:21,451 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-12-02 13:10:21,451 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-12-02 13:10:21,451 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 13:10:21,483 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 13:10:21,483 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-12-02 13:10:21,483 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-12-02 13:10:21,484 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-12-02 13:10:21,484 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-12-02 13:10:21,484 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-12-02 13:10:21,484 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-12-02 13:10:21,484 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-12-02 13:10:21,484 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-12-02 13:10:21,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 13:10:21,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:10:21,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:10:21,661 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:10:21,664 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:10:29,000 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:10:31,088 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:10:31,088 INFO L309 CfgBuilder]: Removed 11 assume(true) statements. [2023-12-02 13:10:31,091 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:10:31 BoogieIcfgContainer [2023-12-02 13:10:31,091 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:10:31,093 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:10:31,094 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:10:31,097 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:10:31,097 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:10:17" (1/3) ... [2023-12-02 13:10:31,098 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cd9a83b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:10:31, skipping insertion in model container [2023-12-02 13:10:31,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:10:20" (2/3) ... [2023-12-02 13:10:31,098 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cd9a83b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:10:31, skipping insertion in model container [2023-12-02 13:10:31,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:10:31" (3/3) ... [2023-12-02 13:10:31,100 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.07.cil-1.c [2023-12-02 13:10:31,119 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:10:31,119 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 13:10:31,201 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:10:31,207 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@43aaee44, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:10:31,207 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 13:10:31,217 INFO L276 IsEmpty]: Start isEmpty. Operand has 1784 states, 1754 states have (on average 1.9618015963511972) internal successors, (3441), 1757 states have internal predecessors, (3441), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-12-02 13:10:31,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-02 13:10:31,227 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:10:31,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:10:31,228 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:10:31,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:10:31,231 INFO L85 PathProgramCache]: Analyzing trace with hash -712170850, now seen corresponding path program 1 times [2023-12-02 13:10:31,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:10:31,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528423102] [2023-12-02 13:10:31,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:10:31,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:10:31,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:10:31,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:10:31,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:10:31,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528423102] [2023-12-02 13:10:31,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528423102] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:10:31,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:10:31,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:10:31,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668084198] [2023-12-02 13:10:31,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:10:31,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:10:31,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:10:31,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:10:31,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:10:31,641 INFO L87 Difference]: Start difference. First operand has 1784 states, 1754 states have (on average 1.9618015963511972) internal successors, (3441), 1757 states have internal predecessors, (3441), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 13:10:32,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:10:32,513 INFO L93 Difference]: Finished difference Result 3692 states and 7171 transitions. [2023-12-02 13:10:32,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:10:32,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2023-12-02 13:10:32,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:10:32,541 INFO L225 Difference]: With dead ends: 3692 [2023-12-02 13:10:32,541 INFO L226 Difference]: Without dead ends: 1907 [2023-12-02 13:10:32,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:10:32,553 INFO L413 NwaCegarLoop]: 3377 mSDtfsCounter, 3630 mSDsluCounter, 3299 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3630 SdHoareTripleChecker+Valid, 6676 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 13:10:32,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3630 Valid, 6676 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 13:10:32,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2023-12-02 13:10:32,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1906. [2023-12-02 13:10:32,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1854 states have (on average 1.9288025889967637) internal successors, (3576), 1857 states have internal predecessors, (3576), 38 states have call successors, (38), 12 states have call predecessors, (38), 12 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2023-12-02 13:10:32,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 3652 transitions. [2023-12-02 13:10:32,685 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 3652 transitions. Word has length 52 [2023-12-02 13:10:32,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:10:32,686 INFO L495 AbstractCegarLoop]: Abstraction has 1906 states and 3652 transitions. [2023-12-02 13:10:32,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 13:10:32,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 3652 transitions. [2023-12-02 13:10:32,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-02 13:10:32,694 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:10:32,694 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:10:32,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 13:10:32,695 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:10:32,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:10:32,696 INFO L85 PathProgramCache]: Analyzing trace with hash 614870618, now seen corresponding path program 1 times [2023-12-02 13:10:32,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:10:32,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727363044] [2023-12-02 13:10:32,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:10:32,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:10:32,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:10:32,900 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 13:10:32,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:10:32,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727363044] [2023-12-02 13:10:32,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727363044] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:10:32,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757740764] [2023-12-02 13:10:32,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:10:32,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:10:32,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:10:32,908 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:10:32,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 13:10:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:10:33,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:10:33,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:10:33,142 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 13:10:33,143 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:10:33,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757740764] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:10:33,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:10:33,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 13:10:33,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408494963] [2023-12-02 13:10:33,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:10:33,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:10:33,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:10:33,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:10:33,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:10:33,147 INFO L87 Difference]: Start difference. First operand 1906 states and 3652 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 13:10:33,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:10:33,611 INFO L93 Difference]: Finished difference Result 2419 states and 4413 transitions. [2023-12-02 13:10:33,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:10:33,611 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2023-12-02 13:10:33,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:10:33,628 INFO L225 Difference]: With dead ends: 2419 [2023-12-02 13:10:33,628 INFO L226 Difference]: Without dead ends: 2159 [2023-12-02 13:10:33,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:10:33,632 INFO L413 NwaCegarLoop]: 3265 mSDtfsCounter, 3443 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3443 SdHoareTripleChecker+Valid, 3423 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:10:33,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3443 Valid, 3423 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:10:33,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2159 states. [2023-12-02 13:10:33,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2159 to 2155. [2023-12-02 13:10:33,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2059 states have (on average 1.8790675084992714) internal successors, (3869), 2063 states have internal predecessors, (3869), 70 states have call successors, (70), 24 states have call predecessors, (70), 24 states have return successors, (70), 68 states have call predecessors, (70), 70 states have call successors, (70) [2023-12-02 13:10:33,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 4009 transitions. [2023-12-02 13:10:33,716 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 4009 transitions. Word has length 102 [2023-12-02 13:10:33,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:10:33,716 INFO L495 AbstractCegarLoop]: Abstraction has 2155 states and 4009 transitions. [2023-12-02 13:10:33,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 13:10:33,717 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 4009 transitions. [2023-12-02 13:10:33,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-02 13:10:33,722 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:10:33,722 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:10:33,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 13:10:33,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:10:33,923 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:10:33,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:10:33,924 INFO L85 PathProgramCache]: Analyzing trace with hash -969966888, now seen corresponding path program 1 times [2023-12-02 13:10:33,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:10:33,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846618278] [2023-12-02 13:10:33,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:10:33,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:10:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:10:34,105 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 13:10:34,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:10:34,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846618278] [2023-12-02 13:10:34,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846618278] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:10:34,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334380966] [2023-12-02 13:10:34,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:10:34,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:10:34,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:10:34,108 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:10:34,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 13:10:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:10:34,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:10:34,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:10:34,335 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 13:10:34,335 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:10:34,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334380966] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:10:34,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:10:34,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 13:10:34,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327739260] [2023-12-02 13:10:34,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:10:34,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:10:34,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:10:34,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:10:34,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:10:34,338 INFO L87 Difference]: Start difference. First operand 2155 states and 4009 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 13:10:34,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:10:34,805 INFO L93 Difference]: Finished difference Result 3160 states and 5492 transitions. [2023-12-02 13:10:34,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:10:34,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2023-12-02 13:10:34,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:10:34,824 INFO L225 Difference]: With dead ends: 3160 [2023-12-02 13:10:34,824 INFO L226 Difference]: Without dead ends: 2651 [2023-12-02 13:10:34,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:10:34,829 INFO L413 NwaCegarLoop]: 3222 mSDtfsCounter, 3437 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3437 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:10:34,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3437 Valid, 3380 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:10:34,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2023-12-02 13:10:34,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2645. [2023-12-02 13:10:34,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2463 states have (on average 1.8038976857490865) internal successors, (4443), 2469 states have internal predecessors, (4443), 132 states have call successors, (132), 48 states have call predecessors, (132), 48 states have return successors, (132), 128 states have call predecessors, (132), 132 states have call successors, (132) [2023-12-02 13:10:34,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 4707 transitions. [2023-12-02 13:10:34,939 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 4707 transitions. Word has length 102 [2023-12-02 13:10:34,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:10:34,940 INFO L495 AbstractCegarLoop]: Abstraction has 2645 states and 4707 transitions. [2023-12-02 13:10:34,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 13:10:34,940 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 4707 transitions. [2023-12-02 13:10:34,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-02 13:10:34,945 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:10:34,945 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:10:34,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 13:10:35,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:10:35,146 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:10:35,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:10:35,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1775467990, now seen corresponding path program 1 times [2023-12-02 13:10:35,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:10:35,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762187485] [2023-12-02 13:10:35,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:10:35,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:10:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:10:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 13:10:35,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:10:35,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762187485] [2023-12-02 13:10:35,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762187485] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:10:35,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246672205] [2023-12-02 13:10:35,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:10:35,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:10:35,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:10:35,277 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:10:35,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 13:10:35,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:10:35,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:10:35,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:10:35,498 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 13:10:35,499 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:10:35,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246672205] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:10:35,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:10:35,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 13:10:35,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033733492] [2023-12-02 13:10:35,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:10:35,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:10:35,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:10:35,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:10:35,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:10:35,501 INFO L87 Difference]: Start difference. First operand 2645 states and 4707 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 13:10:35,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:10:35,991 INFO L93 Difference]: Finished difference Result 4618 states and 7600 transitions. [2023-12-02 13:10:35,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:10:35,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2023-12-02 13:10:35,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:10:36,016 INFO L225 Difference]: With dead ends: 4618 [2023-12-02 13:10:36,016 INFO L226 Difference]: Without dead ends: 3619 [2023-12-02 13:10:36,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:10:36,022 INFO L413 NwaCegarLoop]: 3261 mSDtfsCounter, 3446 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3446 SdHoareTripleChecker+Valid, 3419 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:10:36,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3446 Valid, 3419 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:10:36,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2023-12-02 13:10:36,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 3609. [2023-12-02 13:10:36,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3609 states, 3259 states have (on average 1.708192697146364) internal successors, (5567), 3269 states have internal predecessors, (5567), 252 states have call successors, (252), 96 states have call predecessors, (252), 96 states have return successors, (252), 244 states have call predecessors, (252), 252 states have call successors, (252) [2023-12-02 13:10:36,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3609 states to 3609 states and 6071 transitions. [2023-12-02 13:10:36,172 INFO L78 Accepts]: Start accepts. Automaton has 3609 states and 6071 transitions. Word has length 102 [2023-12-02 13:10:36,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:10:36,172 INFO L495 AbstractCegarLoop]: Abstraction has 3609 states and 6071 transitions. [2023-12-02 13:10:36,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 13:10:36,173 INFO L276 IsEmpty]: Start isEmpty. Operand 3609 states and 6071 transitions. [2023-12-02 13:10:36,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-02 13:10:36,179 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:10:36,180 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:10:36,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 13:10:36,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:10:36,384 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:10:36,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:10:36,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1838155624, now seen corresponding path program 1 times [2023-12-02 13:10:36,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:10:36,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364523841] [2023-12-02 13:10:36,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:10:36,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:10:36,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:10:36,516 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 13:10:36,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:10:36,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364523841] [2023-12-02 13:10:36,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364523841] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:10:36,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895770436] [2023-12-02 13:10:36,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:10:36,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:10:36,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:10:36,519 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:10:36,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 13:10:36,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:10:36,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:10:36,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:10:36,752 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 13:10:36,753 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:10:36,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895770436] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:10:36,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:10:36,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 13:10:36,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903044675] [2023-12-02 13:10:36,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:10:36,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:10:36,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:10:36,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:10:36,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:10:36,756 INFO L87 Difference]: Start difference. First operand 3609 states and 6071 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 13:10:37,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:10:37,237 INFO L93 Difference]: Finished difference Result 7486 states and 11716 transitions. [2023-12-02 13:10:37,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:10:37,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2023-12-02 13:10:37,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:10:37,264 INFO L225 Difference]: With dead ends: 7486 [2023-12-02 13:10:37,264 INFO L226 Difference]: Without dead ends: 5523 [2023-12-02 13:10:37,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:10:37,272 INFO L413 NwaCegarLoop]: 3222 mSDtfsCounter, 3431 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3431 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:10:37,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3431 Valid, 3380 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:10:37,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5523 states. [2023-12-02 13:10:37,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5523 to 5505. [2023-12-02 13:10:37,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5505 states, 4827 states have (on average 1.6090739589807335) internal successors, (7767), 4845 states have internal predecessors, (7767), 484 states have call successors, (484), 192 states have call predecessors, (484), 192 states have return successors, (484), 468 states have call predecessors, (484), 484 states have call successors, (484) [2023-12-02 13:10:37,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5505 states to 5505 states and 8735 transitions. [2023-12-02 13:10:37,423 INFO L78 Accepts]: Start accepts. Automaton has 5505 states and 8735 transitions. Word has length 102 [2023-12-02 13:10:37,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:10:37,424 INFO L495 AbstractCegarLoop]: Abstraction has 5505 states and 8735 transitions. [2023-12-02 13:10:37,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 13:10:37,424 INFO L276 IsEmpty]: Start isEmpty. Operand 5505 states and 8735 transitions. [2023-12-02 13:10:37,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-02 13:10:37,429 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:10:37,430 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:10:37,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 13:10:37,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:10:37,631 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:10:37,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:10:37,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1239838186, now seen corresponding path program 1 times [2023-12-02 13:10:37,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:10:37,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934805161] [2023-12-02 13:10:37,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:10:37,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:10:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:10:37,753 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 13:10:37,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:10:37,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934805161] [2023-12-02 13:10:37,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934805161] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:10:37,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:10:37,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:10:37,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431881150] [2023-12-02 13:10:37,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:10:37,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:10:37,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:10:37,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:10:37,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:10:37,756 INFO L87 Difference]: Start difference. First operand 5505 states and 8735 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 13:10:38,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:10:38,339 INFO L93 Difference]: Finished difference Result 8563 states and 13184 transitions. [2023-12-02 13:10:38,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:10:38,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 102 [2023-12-02 13:10:38,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:10:38,382 INFO L225 Difference]: With dead ends: 8563 [2023-12-02 13:10:38,382 INFO L226 Difference]: Without dead ends: 6593 [2023-12-02 13:10:38,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:10:38,392 INFO L413 NwaCegarLoop]: 3316 mSDtfsCounter, 89 mSDsluCounter, 3230 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 6546 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:10:38,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 6546 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:10:38,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6593 states. [2023-12-02 13:10:38,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6593 to 6273. [2023-12-02 13:10:38,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6273 states, 5563 states have (on average 1.6061477619989215) internal successors, (8935), 5581 states have internal predecessors, (8935), 500 states have call successors, (500), 208 states have call predecessors, (500), 208 states have return successors, (500), 484 states have call predecessors, (500), 500 states have call successors, (500) [2023-12-02 13:10:38,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6273 states to 6273 states and 9935 transitions. [2023-12-02 13:10:38,726 INFO L78 Accepts]: Start accepts. Automaton has 6273 states and 9935 transitions. Word has length 102 [2023-12-02 13:10:38,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:10:38,726 INFO L495 AbstractCegarLoop]: Abstraction has 6273 states and 9935 transitions. [2023-12-02 13:10:38,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 13:10:38,727 INFO L276 IsEmpty]: Start isEmpty. Operand 6273 states and 9935 transitions. [2023-12-02 13:10:38,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-12-02 13:10:38,737 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:10:38,738 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:10:38,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 13:10:38,738 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:10:38,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:10:38,739 INFO L85 PathProgramCache]: Analyzing trace with hash -832060674, now seen corresponding path program 1 times [2023-12-02 13:10:38,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:10:38,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953354293] [2023-12-02 13:10:38,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:10:38,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:10:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:10:38,807 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-12-02 13:10:38,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:10:38,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953354293] [2023-12-02 13:10:38,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953354293] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:10:38,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:10:38,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:10:38,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845807939] [2023-12-02 13:10:38,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:10:38,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:10:38,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:10:38,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:10:38,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:10:38,809 INFO L87 Difference]: Start difference. First operand 6273 states and 9935 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 13:10:39,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:10:39,390 INFO L93 Difference]: Finished difference Result 15382 states and 23252 transitions. [2023-12-02 13:10:39,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:10:39,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 138 [2023-12-02 13:10:39,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:10:39,438 INFO L225 Difference]: With dead ends: 15382 [2023-12-02 13:10:39,439 INFO L226 Difference]: Without dead ends: 10755 [2023-12-02 13:10:39,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:10:39,455 INFO L413 NwaCegarLoop]: 3224 mSDtfsCounter, 3434 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3434 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:10:39,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3434 Valid, 3382 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:10:39,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10755 states. [2023-12-02 13:10:39,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10755 to 10705. [2023-12-02 13:10:39,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10705 states, 9323 states have (on average 1.5315885444599378) internal successors, (14279), 9357 states have internal predecessors, (14279), 964 states have call successors, (964), 416 states have call predecessors, (964), 416 states have return successors, (964), 932 states have call predecessors, (964), 964 states have call successors, (964) [2023-12-02 13:10:39,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10705 states to 10705 states and 16207 transitions. [2023-12-02 13:10:39,839 INFO L78 Accepts]: Start accepts. Automaton has 10705 states and 16207 transitions. Word has length 138 [2023-12-02 13:10:39,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:10:39,840 INFO L495 AbstractCegarLoop]: Abstraction has 10705 states and 16207 transitions. [2023-12-02 13:10:39,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 13:10:39,841 INFO L276 IsEmpty]: Start isEmpty. Operand 10705 states and 16207 transitions. [2023-12-02 13:10:39,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-12-02 13:10:39,869 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:10:39,870 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:10:39,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 13:10:39,870 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:10:39,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:10:39,871 INFO L85 PathProgramCache]: Analyzing trace with hash 944489654, now seen corresponding path program 1 times [2023-12-02 13:10:39,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:10:39,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289924425] [2023-12-02 13:10:39,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:10:39,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:10:39,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:10:39,963 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-12-02 13:10:39,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:10:39,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289924425] [2023-12-02 13:10:39,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289924425] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:10:39,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:10:39,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:10:39,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757984437] [2023-12-02 13:10:39,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:10:39,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:10:39,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:10:39,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:10:39,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:10:39,966 INFO L87 Difference]: Start difference. First operand 10705 states and 16207 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 13:10:40,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:10:40,958 INFO L93 Difference]: Finished difference Result 28534 states and 42036 transitions. [2023-12-02 13:10:40,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:10:40,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 138 [2023-12-02 13:10:40,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:10:41,032 INFO L225 Difference]: With dead ends: 28534 [2023-12-02 13:10:41,032 INFO L226 Difference]: Without dead ends: 19475 [2023-12-02 13:10:41,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:10:41,065 INFO L413 NwaCegarLoop]: 3224 mSDtfsCounter, 3436 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3436 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:10:41,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3436 Valid, 3382 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:10:41,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19475 states. [2023-12-02 13:10:41,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19475 to 19377. [2023-12-02 13:10:41,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19377 states, 16683 states have (on average 1.4773721752682372) internal successors, (24647), 16749 states have internal predecessors, (24647), 1860 states have call successors, (1860), 832 states have call predecessors, (1860), 832 states have return successors, (1860), 1796 states have call predecessors, (1860), 1860 states have call successors, (1860) [2023-12-02 13:10:41,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19377 states to 19377 states and 28367 transitions. [2023-12-02 13:10:41,787 INFO L78 Accepts]: Start accepts. Automaton has 19377 states and 28367 transitions. Word has length 138 [2023-12-02 13:10:41,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:10:41,788 INFO L495 AbstractCegarLoop]: Abstraction has 19377 states and 28367 transitions. [2023-12-02 13:10:41,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 13:10:41,788 INFO L276 IsEmpty]: Start isEmpty. Operand 19377 states and 28367 transitions. [2023-12-02 13:10:41,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-12-02 13:10:41,832 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:10:41,832 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:10:41,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 13:10:41,833 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:10:41,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:10:41,833 INFO L85 PathProgramCache]: Analyzing trace with hash 2062929412, now seen corresponding path program 1 times [2023-12-02 13:10:41,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:10:41,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834630433] [2023-12-02 13:10:41,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:10:41,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:10:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:10:41,927 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-12-02 13:10:41,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:10:41,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834630433] [2023-12-02 13:10:41,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834630433] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:10:41,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:10:41,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:10:41,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746490980] [2023-12-02 13:10:41,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:10:41,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:10:41,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:10:41,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:10:41,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:10:41,930 INFO L87 Difference]: Start difference. First operand 19377 states and 28367 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 13:10:43,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:10:43,057 INFO L93 Difference]: Finished difference Result 54262 states and 78420 transitions. [2023-12-02 13:10:43,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:10:43,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 138 [2023-12-02 13:10:43,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:10:43,144 INFO L225 Difference]: With dead ends: 54262 [2023-12-02 13:10:43,144 INFO L226 Difference]: Without dead ends: 36531 [2023-12-02 13:10:43,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:10:43,191 INFO L413 NwaCegarLoop]: 3232 mSDtfsCounter, 3439 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3439 SdHoareTripleChecker+Valid, 3390 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:10:43,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3439 Valid, 3390 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:10:43,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36531 states. [2023-12-02 13:10:44,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36531 to 36337. [2023-12-02 13:10:44,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36337 states, 31083 states have (on average 1.439468519769649) internal successors, (44743), 31213 states have internal predecessors, (44743), 3588 states have call successors, (3588), 1664 states have call predecessors, (3588), 1664 states have return successors, (3588), 3460 states have call predecessors, (3588), 3588 states have call successors, (3588) [2023-12-02 13:10:44,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36337 states to 36337 states and 51919 transitions. [2023-12-02 13:10:44,310 INFO L78 Accepts]: Start accepts. Automaton has 36337 states and 51919 transitions. Word has length 138 [2023-12-02 13:10:44,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:10:44,311 INFO L495 AbstractCegarLoop]: Abstraction has 36337 states and 51919 transitions. [2023-12-02 13:10:44,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 13:10:44,311 INFO L276 IsEmpty]: Start isEmpty. Operand 36337 states and 51919 transitions. [2023-12-02 13:10:44,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-12-02 13:10:44,375 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:10:44,375 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:10:44,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 13:10:44,375 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:10:44,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:10:44,375 INFO L85 PathProgramCache]: Analyzing trace with hash -498988485, now seen corresponding path program 1 times [2023-12-02 13:10:44,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:10:44,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100854766] [2023-12-02 13:10:44,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:10:44,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:10:44,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:10:44,847 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 12 proven. 50 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-12-02 13:10:44,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:10:44,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100854766] [2023-12-02 13:10:44,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100854766] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:10:44,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738729467] [2023-12-02 13:10:44,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:10:44,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:10:44,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:10:44,849 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:10:44,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 13:10:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:10:45,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 1008 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 13:10:45,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:10:45,308 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 76 proven. 20 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 13:10:45,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:10:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 13 proven. 50 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-02 13:10:45,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738729467] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:10:45,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1946574875] [2023-12-02 13:10:45,740 INFO L159 IcfgInterpreter]: Started Sifa with 82 locations of interest [2023-12-02 13:10:45,740 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:10:45,743 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:10:45,747 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:10:45,747 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:11:13,612 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 1 for LOIs [2023-12-02 13:11:13,621 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 199 for LOIs [2023-12-02 13:11:13,807 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 1 for LOIs [2023-12-02 13:11:13,808 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 1 for LOIs [2023-12-02 13:11:13,833 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 42 for LOIs [2023-12-02 13:11:13,968 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 1 for LOIs [2023-12-02 13:11:14,150 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:11:27,998 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '260995#(and (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (= ~m_pc~0 1) (not (= ~token~0 (+ 7 ~local~0))) (= ~m_st~0 1) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|))' at error location [2023-12-02 13:11:27,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:11:27,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:11:27,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2023-12-02 13:11:27,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891844469] [2023-12-02 13:11:27,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:11:28,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 13:11:28,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:11:28,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 13:11:28,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=5556, Unknown=0, NotChecked=0, Total=6006 [2023-12-02 13:11:28,003 INFO L87 Difference]: Start difference. First operand 36337 states and 51919 transitions. Second operand has 13 states, 13 states have (on average 16.923076923076923) internal successors, (220), 13 states have internal predecessors, (220), 8 states have call successors, (35), 7 states have call predecessors, (35), 8 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) [2023-12-02 13:11:32,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:11:32,336 INFO L93 Difference]: Finished difference Result 119673 states and 169811 transitions. [2023-12-02 13:11:32,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 13:11:32,337 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 16.923076923076923) internal successors, (220), 13 states have internal predecessors, (220), 8 states have call successors, (35), 7 states have call predecessors, (35), 8 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) Word has length 158 [2023-12-02 13:11:32,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:11:32,578 INFO L225 Difference]: With dead ends: 119673 [2023-12-02 13:11:32,578 INFO L226 Difference]: Without dead ends: 84983 [2023-12-02 13:11:32,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3366 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=839, Invalid=9463, Unknown=0, NotChecked=0, Total=10302 [2023-12-02 13:11:32,656 INFO L413 NwaCegarLoop]: 3254 mSDtfsCounter, 8788 mSDsluCounter, 19307 mSDsCounter, 0 mSdLazyCounter, 2053 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8788 SdHoareTripleChecker+Valid, 22561 SdHoareTripleChecker+Invalid, 2723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 2053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:11:32,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8788 Valid, 22561 Invalid, 2723 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [670 Valid, 2053 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 13:11:32,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84983 states. [2023-12-02 13:11:35,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84983 to 77777. [2023-12-02 13:11:35,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77777 states, 66155 states have (on average 1.4048068929030308) internal successors, (92935), 66445 states have internal predecessors, (92935), 7876 states have call successors, (7876), 3744 states have call predecessors, (7876), 3744 states have return successors, (7876), 7588 states have call predecessors, (7876), 7876 states have call successors, (7876) [2023-12-02 13:11:35,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77777 states to 77777 states and 108687 transitions. [2023-12-02 13:11:35,410 INFO L78 Accepts]: Start accepts. Automaton has 77777 states and 108687 transitions. Word has length 158 [2023-12-02 13:11:35,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:11:35,411 INFO L495 AbstractCegarLoop]: Abstraction has 77777 states and 108687 transitions. [2023-12-02 13:11:35,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 16.923076923076923) internal successors, (220), 13 states have internal predecessors, (220), 8 states have call successors, (35), 7 states have call predecessors, (35), 8 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) [2023-12-02 13:11:35,411 INFO L276 IsEmpty]: Start isEmpty. Operand 77777 states and 108687 transitions. [2023-12-02 13:11:35,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-12-02 13:11:35,520 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:11:35,520 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:11:35,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 13:11:35,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 13:11:35,721 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:11:35,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:11:35,721 INFO L85 PathProgramCache]: Analyzing trace with hash 619373532, now seen corresponding path program 1 times [2023-12-02 13:11:35,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:11:35,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907514285] [2023-12-02 13:11:35,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:11:35,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:11:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:11:35,830 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-12-02 13:11:35,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:11:35,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907514285] [2023-12-02 13:11:35,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907514285] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:11:35,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155368544] [2023-12-02 13:11:35,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:11:35,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:11:35,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:11:35,832 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:11:35,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 13:11:36,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:11:36,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:11:36,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:11:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 13:11:36,064 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:11:36,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155368544] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:11:36,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:11:36,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 13:11:36,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203796746] [2023-12-02 13:11:36,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:11:36,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:11:36,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:11:36,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:11:36,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:11:36,067 INFO L87 Difference]: Start difference. First operand 77777 states and 108687 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 13:11:39,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:11:39,330 INFO L93 Difference]: Finished difference Result 148661 states and 208657 transitions. [2023-12-02 13:11:39,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:11:39,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 160 [2023-12-02 13:11:39,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:11:39,572 INFO L225 Difference]: With dead ends: 148661 [2023-12-02 13:11:39,572 INFO L226 Difference]: Without dead ends: 97651 [2023-12-02 13:11:39,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:11:39,644 INFO L413 NwaCegarLoop]: 3343 mSDtfsCounter, 126 mSDsluCounter, 3232 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 6575 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:11:39,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 6575 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:11:39,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97651 states. [2023-12-02 13:11:42,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97651 to 89393. [2023-12-02 13:11:42,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89393 states, 77195 states have (on average 1.4252607034134335) internal successors, (110023), 77485 states have internal predecessors, (110023), 8164 states have call successors, (8164), 4032 states have call predecessors, (8164), 4032 states have return successors, (8164), 7876 states have call predecessors, (8164), 8164 states have call successors, (8164) [2023-12-02 13:11:42,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89393 states to 89393 states and 126351 transitions. [2023-12-02 13:11:42,860 INFO L78 Accepts]: Start accepts. Automaton has 89393 states and 126351 transitions. Word has length 160 [2023-12-02 13:11:42,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:11:42,861 INFO L495 AbstractCegarLoop]: Abstraction has 89393 states and 126351 transitions. [2023-12-02 13:11:42,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 13:11:42,861 INFO L276 IsEmpty]: Start isEmpty. Operand 89393 states and 126351 transitions. [2023-12-02 13:11:42,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-12-02 13:11:42,975 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:11:42,975 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:11:42,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 13:11:43,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 13:11:43,176 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:11:43,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:11:43,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1904944612, now seen corresponding path program 2 times [2023-12-02 13:11:43,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:11:43,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830403503] [2023-12-02 13:11:43,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:11:43,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:11:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:11:43,471 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-12-02 13:11:43,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:11:43,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830403503] [2023-12-02 13:11:43,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830403503] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:11:43,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646958735] [2023-12-02 13:11:43,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:11:43,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:11:43,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:11:43,474 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:11:43,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 13:11:43,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 13:11:43,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:11:43,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:11:43,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:11:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 13:11:43,661 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:11:43,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646958735] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:11:43,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:11:43,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 13:11:43,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99981106] [2023-12-02 13:11:43,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:11:43,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:11:43,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:11:43,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:11:43,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:11:43,663 INFO L87 Difference]: Start difference. First operand 89393 states and 126351 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 13:11:46,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:11:46,685 INFO L93 Difference]: Finished difference Result 152213 states and 218065 transitions. [2023-12-02 13:11:46,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:11:46,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 160 [2023-12-02 13:11:46,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:11:46,880 INFO L225 Difference]: With dead ends: 152213 [2023-12-02 13:11:46,881 INFO L226 Difference]: Without dead ends: 89587 [2023-12-02 13:11:46,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:11:46,961 INFO L413 NwaCegarLoop]: 3369 mSDtfsCounter, 167 mSDsluCounter, 3215 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 6584 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:11:46,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 6584 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:11:47,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89587 states. [2023-12-02 13:11:49,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89587 to 89201. [2023-12-02 13:11:50,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89201 states, 77003 states have (on average 1.4138540056880902) internal successors, (108871), 77293 states have internal predecessors, (108871), 8164 states have call successors, (8164), 4032 states have call predecessors, (8164), 4032 states have return successors, (8164), 7876 states have call predecessors, (8164), 8164 states have call successors, (8164) [2023-12-02 13:11:50,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89201 states to 89201 states and 125199 transitions. [2023-12-02 13:11:50,210 INFO L78 Accepts]: Start accepts. Automaton has 89201 states and 125199 transitions. Word has length 160 [2023-12-02 13:11:50,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:11:50,211 INFO L495 AbstractCegarLoop]: Abstraction has 89201 states and 125199 transitions. [2023-12-02 13:11:50,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 13:11:50,211 INFO L276 IsEmpty]: Start isEmpty. Operand 89201 states and 125199 transitions. [2023-12-02 13:11:50,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-12-02 13:11:50,333 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:11:50,334 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:11:50,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 13:11:50,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 13:11:50,534 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:11:50,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:11:50,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1984834854, now seen corresponding path program 1 times [2023-12-02 13:11:50,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:11:50,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976270788] [2023-12-02 13:11:50,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:11:50,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:11:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:11:50,827 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-12-02 13:11:50,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:11:50,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976270788] [2023-12-02 13:11:50,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976270788] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:11:50,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636230906] [2023-12-02 13:11:50,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:11:50,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:11:50,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:11:50,829 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:11:50,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 13:11:51,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:11:51,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:11:51,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:11:51,075 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 13:11:51,075 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:11:51,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636230906] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:11:51,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:11:51,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 13:11:51,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870529783] [2023-12-02 13:11:51,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:11:51,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:11:51,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:11:51,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:11:51,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:11:51,077 INFO L87 Difference]: Start difference. First operand 89201 states and 125199 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 13:11:54,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:11:54,156 INFO L93 Difference]: Finished difference Result 148021 states and 210321 transitions. [2023-12-02 13:11:54,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:11:54,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 160 [2023-12-02 13:11:54,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:11:54,347 INFO L225 Difference]: With dead ends: 148021 [2023-12-02 13:11:54,347 INFO L226 Difference]: Without dead ends: 89395 [2023-12-02 13:11:54,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:11:54,434 INFO L413 NwaCegarLoop]: 3332 mSDtfsCounter, 161 mSDsluCounter, 3214 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 6546 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:11:54,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 6546 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:11:54,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89395 states. [2023-12-02 13:11:58,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89395 to 88817. [2023-12-02 13:11:58,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88817 states, 76619 states have (on average 1.4008927289575692) internal successors, (107335), 76909 states have internal predecessors, (107335), 8164 states have call successors, (8164), 4032 states have call predecessors, (8164), 4032 states have return successors, (8164), 7876 states have call predecessors, (8164), 8164 states have call successors, (8164) [2023-12-02 13:11:58,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88817 states to 88817 states and 123663 transitions. [2023-12-02 13:11:58,347 INFO L78 Accepts]: Start accepts. Automaton has 88817 states and 123663 transitions. Word has length 160 [2023-12-02 13:11:58,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:11:58,347 INFO L495 AbstractCegarLoop]: Abstraction has 88817 states and 123663 transitions. [2023-12-02 13:11:58,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 13:11:58,348 INFO L276 IsEmpty]: Start isEmpty. Operand 88817 states and 123663 transitions. [2023-12-02 13:11:58,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-12-02 13:11:58,593 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:11:58,594 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:11:58,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 13:11:58,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 13:11:58,794 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:11:58,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:11:58,795 INFO L85 PathProgramCache]: Analyzing trace with hash -399997348, now seen corresponding path program 1 times [2023-12-02 13:11:58,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:11:58,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243546347] [2023-12-02 13:11:58,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:11:58,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:11:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:11:59,068 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 10 proven. 47 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-12-02 13:11:59,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:11:59,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243546347] [2023-12-02 13:11:59,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243546347] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:11:59,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138925401] [2023-12-02 13:11:59,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:11:59,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:11:59,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:11:59,070 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:11:59,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 13:11:59,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:11:59,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:11:59,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:11:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 13:11:59,255 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:11:59,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138925401] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:11:59,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:11:59,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 13:11:59,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453637947] [2023-12-02 13:11:59,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:11:59,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:11:59,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:11:59,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:11:59,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:11:59,257 INFO L87 Difference]: Start difference. First operand 88817 states and 123663 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 13:12:02,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:12:02,587 INFO L93 Difference]: Finished difference Result 165851 states and 228820 transitions. [2023-12-02 13:12:02,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:12:02,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 160 [2023-12-02 13:12:02,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:12:02,798 INFO L225 Difference]: With dead ends: 165851 [2023-12-02 13:12:02,799 INFO L226 Difference]: Without dead ends: 107993 [2023-12-02 13:12:02,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:12:02,869 INFO L413 NwaCegarLoop]: 3246 mSDtfsCounter, 3442 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3442 SdHoareTripleChecker+Valid, 3290 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:12:02,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3442 Valid, 3290 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:12:02,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107993 states. [2023-12-02 13:12:06,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107993 to 107993. [2023-12-02 13:12:06,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107993 states, 94083 states have (on average 1.3642315827514004) internal successors, (128351), 94373 states have internal predecessors, (128351), 8732 states have call successors, (8732), 5176 states have call predecessors, (8732), 5176 states have return successors, (8732), 8444 states have call predecessors, (8732), 8732 states have call successors, (8732) [2023-12-02 13:12:07,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107993 states to 107993 states and 145815 transitions. [2023-12-02 13:12:07,194 INFO L78 Accepts]: Start accepts. Automaton has 107993 states and 145815 transitions. Word has length 160 [2023-12-02 13:12:07,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:12:07,194 INFO L495 AbstractCegarLoop]: Abstraction has 107993 states and 145815 transitions. [2023-12-02 13:12:07,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 13:12:07,195 INFO L276 IsEmpty]: Start isEmpty. Operand 107993 states and 145815 transitions. [2023-12-02 13:12:07,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-12-02 13:12:07,300 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:12:07,300 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:12:07,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 13:12:07,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 13:12:07,501 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:12:07,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:12:07,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1102112103, now seen corresponding path program 1 times [2023-12-02 13:12:07,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:12:07,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861178496] [2023-12-02 13:12:07,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:12:07,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:12:07,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:12:07,710 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 48 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-12-02 13:12:07,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:12:07,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861178496] [2023-12-02 13:12:07,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861178496] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:12:07,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325814497] [2023-12-02 13:12:07,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:12:07,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:12:07,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:12:07,712 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:12:07,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 13:12:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:12:07,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 13:12:07,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:12:07,959 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 13:12:07,959 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:12:07,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325814497] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:12:07,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:12:07,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-12-02 13:12:07,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255318728] [2023-12-02 13:12:07,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:12:07,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:12:07,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:12:07,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:12:07,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:12:07,961 INFO L87 Difference]: Start difference. First operand 107993 states and 145815 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 13:12:11,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:12:11,516 INFO L93 Difference]: Finished difference Result 154517 states and 208504 transitions. [2023-12-02 13:12:11,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:12:11,517 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 161 [2023-12-02 13:12:11,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:12:11,739 INFO L225 Difference]: With dead ends: 154517 [2023-12-02 13:12:11,739 INFO L226 Difference]: Without dead ends: 113497 [2023-12-02 13:12:11,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-02 13:12:11,784 INFO L413 NwaCegarLoop]: 3296 mSDtfsCounter, 3426 mSDsluCounter, 3455 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3426 SdHoareTripleChecker+Valid, 6751 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:12:11,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3426 Valid, 6751 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 13:12:11,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113497 states. [2023-12-02 13:12:15,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113497 to 112879. [2023-12-02 13:12:15,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112879 states, 98572 states have (on average 1.358702268392647) internal successors, (133930), 99054 states have internal predecessors, (133930), 8740 states have call successors, (8740), 5181 states have call predecessors, (8740), 5565 states have return successors, (9124), 8644 states have call predecessors, (9124), 8740 states have call successors, (9124) [2023-12-02 13:12:15,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112879 states to 112879 states and 151794 transitions. [2023-12-02 13:12:15,838 INFO L78 Accepts]: Start accepts. Automaton has 112879 states and 151794 transitions. Word has length 161 [2023-12-02 13:12:15,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:12:15,839 INFO L495 AbstractCegarLoop]: Abstraction has 112879 states and 151794 transitions. [2023-12-02 13:12:15,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 13:12:15,839 INFO L276 IsEmpty]: Start isEmpty. Operand 112879 states and 151794 transitions. [2023-12-02 13:12:15,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-12-02 13:12:15,966 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:12:15,967 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:12:15,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 13:12:16,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 13:12:16,167 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:12:16,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:12:16,168 INFO L85 PathProgramCache]: Analyzing trace with hash -604165812, now seen corresponding path program 1 times [2023-12-02 13:12:16,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:12:16,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231685585] [2023-12-02 13:12:16,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:12:16,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:12:16,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:12:16,362 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-12-02 13:12:16,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:12:16,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231685585] [2023-12-02 13:12:16,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231685585] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:12:16,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367206916] [2023-12-02 13:12:16,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:12:16,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:12:16,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:12:16,365 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:12:16,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 13:12:16,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:12:16,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:12:16,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:12:16,566 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 13:12:16,566 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:12:16,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367206916] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:12:16,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:12:16,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 13:12:16,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594653932] [2023-12-02 13:12:16,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:12:16,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:12:16,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:12:16,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:12:16,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:12:16,568 INFO L87 Difference]: Start difference. First operand 112879 states and 151794 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 13:12:20,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:12:20,081 INFO L93 Difference]: Finished difference Result 155835 states and 210653 transitions. [2023-12-02 13:12:20,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:12:20,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 162 [2023-12-02 13:12:20,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:12:20,290 INFO L225 Difference]: With dead ends: 155835 [2023-12-02 13:12:20,290 INFO L226 Difference]: Without dead ends: 107375 [2023-12-02 13:12:20,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:12:20,337 INFO L413 NwaCegarLoop]: 3243 mSDtfsCounter, 46 mSDsluCounter, 3219 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 6462 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:12:20,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 6462 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:12:20,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107375 states. [2023-12-02 13:12:24,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107375 to 100335. [2023-12-02 13:12:24,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100335 states, 87180 states have (on average 1.3740077999541178) internal successors, (119786), 87374 states have internal predecessors, (119786), 8356 states have call successors, (8356), 4797 states have call predecessors, (8356), 4797 states have return successors, (8356), 8164 states have call predecessors, (8356), 8356 states have call successors, (8356) [2023-12-02 13:12:24,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100335 states to 100335 states and 136498 transitions. [2023-12-02 13:12:24,392 INFO L78 Accepts]: Start accepts. Automaton has 100335 states and 136498 transitions. Word has length 162 [2023-12-02 13:12:24,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:12:24,393 INFO L495 AbstractCegarLoop]: Abstraction has 100335 states and 136498 transitions. [2023-12-02 13:12:24,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 13:12:24,393 INFO L276 IsEmpty]: Start isEmpty. Operand 100335 states and 136498 transitions. [2023-12-02 13:12:24,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-12-02 13:12:24,491 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:12:24,492 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:12:24,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 13:12:24,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 13:12:24,692 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:12:24,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:12:24,693 INFO L85 PathProgramCache]: Analyzing trace with hash -511490899, now seen corresponding path program 1 times [2023-12-02 13:12:24,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:12:24,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339002860] [2023-12-02 13:12:24,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:12:24,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:12:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:12:24,950 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-02 13:12:24,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:12:24,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339002860] [2023-12-02 13:12:24,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339002860] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:12:24,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788824012] [2023-12-02 13:12:24,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:12:24,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:12:24,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:12:24,953 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:12:24,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 13:12:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:12:25,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:12:25,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:12:25,166 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 13:12:25,166 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:12:25,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788824012] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:12:25,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:12:25,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 13:12:25,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790338051] [2023-12-02 13:12:25,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:12:25,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:12:25,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:12:25,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:12:25,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:12:25,169 INFO L87 Difference]: Start difference. First operand 100335 states and 136498 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 13:12:30,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:12:30,720 INFO L93 Difference]: Finished difference Result 240689 states and 330571 transitions. [2023-12-02 13:12:30,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:12:30,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 163 [2023-12-02 13:12:30,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:12:31,039 INFO L225 Difference]: With dead ends: 240689 [2023-12-02 13:12:31,039 INFO L226 Difference]: Without dead ends: 142055 [2023-12-02 13:12:31,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:12:31,261 INFO L413 NwaCegarLoop]: 3242 mSDtfsCounter, 89 mSDsluCounter, 3212 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 6454 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:12:31,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 6454 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:12:31,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142055 states. [2023-12-02 13:12:35,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142055 to 115731. [2023-12-02 13:12:36,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115731 states, 101806 states have (on average 1.3947704457497594) internal successors, (141996), 102001 states have internal predecessors, (141996), 8741 states have call successors, (8741), 5182 states have call predecessors, (8741), 5182 states have return successors, (8741), 8548 states have call predecessors, (8741), 8741 states have call successors, (8741) [2023-12-02 13:12:36,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115731 states to 115731 states and 159478 transitions. [2023-12-02 13:12:36,234 INFO L78 Accepts]: Start accepts. Automaton has 115731 states and 159478 transitions. Word has length 163 [2023-12-02 13:12:36,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:12:36,234 INFO L495 AbstractCegarLoop]: Abstraction has 115731 states and 159478 transitions. [2023-12-02 13:12:36,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 13:12:36,235 INFO L276 IsEmpty]: Start isEmpty. Operand 115731 states and 159478 transitions. [2023-12-02 13:12:36,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-12-02 13:12:36,378 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:12:36,379 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:12:36,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-02 13:12:36,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:12:36,579 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:12:36,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:12:36,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1303912990, now seen corresponding path program 1 times [2023-12-02 13:12:36,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:12:36,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133102605] [2023-12-02 13:12:36,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:12:36,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:12:36,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:12:36,775 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 17 proven. 49 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 13:12:36,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:12:36,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133102605] [2023-12-02 13:12:36,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133102605] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:12:36,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142504883] [2023-12-02 13:12:36,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:12:36,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:12:36,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:12:36,777 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:12:36,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 13:12:36,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:12:36,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 13:12:36,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:12:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-12-02 13:12:37,067 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:12:37,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142504883] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:12:37,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:12:37,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-12-02 13:12:37,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390905704] [2023-12-02 13:12:37,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:12:37,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:12:37,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:12:37,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:12:37,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 13:12:37,069 INFO L87 Difference]: Start difference. First operand 115731 states and 159478 transitions. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 13:12:44,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:12:44,366 INFO L93 Difference]: Finished difference Result 284411 states and 390124 transitions. [2023-12-02 13:12:44,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:12:44,367 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 165 [2023-12-02 13:12:44,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:12:44,706 INFO L225 Difference]: With dead ends: 284411 [2023-12-02 13:12:44,707 INFO L226 Difference]: Without dead ends: 170381 [2023-12-02 13:12:44,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-12-02 13:12:44,794 INFO L413 NwaCegarLoop]: 3210 mSDtfsCounter, 3777 mSDsluCounter, 6427 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3793 SdHoareTripleChecker+Valid, 9637 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 13:12:44,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3793 Valid, 9637 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 13:12:44,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170381 states. [2023-12-02 13:12:51,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170381 to 170379. [2023-12-02 13:12:51,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170379 states, 149654 states have (on average 1.3800633461183798) internal successors, (206532), 149945 states have internal predecessors, (206532), 12957 states have call successors, (12957), 7766 states have call predecessors, (12957), 7766 states have return successors, (12957), 12668 states have call predecessors, (12957), 12957 states have call successors, (12957) [2023-12-02 13:12:52,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170379 states to 170379 states and 232446 transitions. [2023-12-02 13:12:52,097 INFO L78 Accepts]: Start accepts. Automaton has 170379 states and 232446 transitions. Word has length 165 [2023-12-02 13:12:52,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:12:52,097 INFO L495 AbstractCegarLoop]: Abstraction has 170379 states and 232446 transitions. [2023-12-02 13:12:52,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 13:12:52,097 INFO L276 IsEmpty]: Start isEmpty. Operand 170379 states and 232446 transitions. [2023-12-02 13:12:52,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-12-02 13:12:52,316 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:12:52,316 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:12:52,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 13:12:52,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 13:12:52,517 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:12:52,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:12:52,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1926292588, now seen corresponding path program 1 times [2023-12-02 13:12:52,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:12:52,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711069353] [2023-12-02 13:12:52,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:12:52,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:12:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:12:52,727 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 17 proven. 49 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-12-02 13:12:52,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:12:52,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711069353] [2023-12-02 13:12:52,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711069353] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:12:52,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789356888] [2023-12-02 13:12:52,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:12:52,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:12:52,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:12:52,729 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:12:52,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 13:12:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:12:52,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 922 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 13:12:52,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:12:52,968 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-12-02 13:12:52,969 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:12:52,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789356888] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:12:52,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:12:52,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-12-02 13:12:52,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224319612] [2023-12-02 13:12:52,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:12:52,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:12:52,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:12:52,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:12:52,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 13:12:52,971 INFO L87 Difference]: Start difference. First operand 170379 states and 232446 transitions. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 13:13:04,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:13:04,420 INFO L93 Difference]: Finished difference Result 419267 states and 569604 transitions. [2023-12-02 13:13:04,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:13:04,421 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 169 [2023-12-02 13:13:04,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:13:05,067 INFO L225 Difference]: With dead ends: 419267 [2023-12-02 13:13:05,067 INFO L226 Difference]: Without dead ends: 250589 [2023-12-02 13:13:05,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-12-02 13:13:05,206 INFO L413 NwaCegarLoop]: 3209 mSDtfsCounter, 3772 mSDsluCounter, 6422 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3788 SdHoareTripleChecker+Valid, 9631 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 13:13:05,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3788 Valid, 9631 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 13:13:05,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250589 states. [2023-12-02 13:13:16,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250589 to 250587. [2023-12-02 13:13:16,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250587 states, 219742 states have (on average 1.3642362406822546) internal successors, (299780), 220177 states have internal predecessors, (299780), 19205 states have call successors, (19205), 11638 states have call predecessors, (19205), 11638 states have return successors, (19205), 18772 states have call predecessors, (19205), 19205 states have call successors, (19205) [2023-12-02 13:13:17,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250587 states to 250587 states and 338190 transitions. [2023-12-02 13:13:17,039 INFO L78 Accepts]: Start accepts. Automaton has 250587 states and 338190 transitions. Word has length 169 [2023-12-02 13:13:17,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:13:17,039 INFO L495 AbstractCegarLoop]: Abstraction has 250587 states and 338190 transitions. [2023-12-02 13:13:17,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 13:13:17,039 INFO L276 IsEmpty]: Start isEmpty. Operand 250587 states and 338190 transitions. [2023-12-02 13:13:17,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-12-02 13:13:17,339 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:13:17,340 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:13:17,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-02 13:13:17,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:13:17,540 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:13:17,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:13:17,541 INFO L85 PathProgramCache]: Analyzing trace with hash -456701410, now seen corresponding path program 1 times [2023-12-02 13:13:17,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:13:17,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357374951] [2023-12-02 13:13:17,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:13:17,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:13:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:13:17,690 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 17 proven. 49 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-02 13:13:17,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:13:17,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357374951] [2023-12-02 13:13:17,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357374951] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:13:17,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974934209] [2023-12-02 13:13:17,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:13:17,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:13:17,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:13:17,692 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:13:17,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 13:13:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:13:17,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 934 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 13:13:17,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:13:17,969 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 13:13:17,970 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:13:17,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974934209] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:13:17,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:13:17,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-12-02 13:13:17,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565647860] [2023-12-02 13:13:17,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:13:17,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:13:17,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:13:17,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:13:17,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 13:13:17,971 INFO L87 Difference]: Start difference. First operand 250587 states and 338190 transitions. Second operand has 6 states, 5 states have (on average 24.4) internal successors, (122), 6 states have internal predecessors, (122), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 13:13:35,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:13:35,551 INFO L93 Difference]: Finished difference Result 617711 states and 830700 transitions. [2023-12-02 13:13:35,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:13:35,552 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.4) internal successors, (122), 6 states have internal predecessors, (122), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 173 [2023-12-02 13:13:35,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:13:36,586 INFO L225 Difference]: With dead ends: 617711 [2023-12-02 13:13:36,586 INFO L226 Difference]: Without dead ends: 368825 [2023-12-02 13:13:36,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-12-02 13:13:36,832 INFO L413 NwaCegarLoop]: 3210 mSDtfsCounter, 7148 mSDsluCounter, 6326 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7164 SdHoareTripleChecker+Valid, 9536 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 13:13:36,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7164 Valid, 9536 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 13:13:37,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368825 states. [2023-12-02 13:13:53,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368825 to 368823. [2023-12-02 13:13:54,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368823 states, 322922 states have (on average 1.3485237921231752) internal successors, (435468), 323573 states have internal predecessors, (435468), 28461 states have call successors, (28461), 17438 states have call predecessors, (28461), 17438 states have return successors, (28461), 27812 states have call predecessors, (28461), 28461 states have call successors, (28461) [2023-12-02 13:13:55,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368823 states to 368823 states and 492390 transitions. [2023-12-02 13:13:55,299 INFO L78 Accepts]: Start accepts. Automaton has 368823 states and 492390 transitions. Word has length 173 [2023-12-02 13:13:55,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:13:55,300 INFO L495 AbstractCegarLoop]: Abstraction has 368823 states and 492390 transitions. [2023-12-02 13:13:55,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.4) internal successors, (122), 6 states have internal predecessors, (122), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 13:13:55,300 INFO L276 IsEmpty]: Start isEmpty. Operand 368823 states and 492390 transitions. [2023-12-02 13:13:56,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-12-02 13:13:56,255 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:13:56,256 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:13:56,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 13:13:56,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-12-02 13:13:56,456 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:13:56,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:13:56,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1872223842, now seen corresponding path program 1 times [2023-12-02 13:13:56,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:13:56,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675056988] [2023-12-02 13:13:56,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:13:56,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:13:56,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:13:56,854 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 15 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-02 13:13:56,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:13:56,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675056988] [2023-12-02 13:13:56,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675056988] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:13:56,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637620336] [2023-12-02 13:13:56,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:13:56,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:13:56,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:13:56,856 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:13:56,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_356d5365-3b94-4c91-90a6-be30bab3a14a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 13:13:57,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:13:57,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:13:57,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:13:57,069 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 13:13:57,070 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:13:57,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637620336] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:13:57,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:13:57,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 13:13:57,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652509086] [2023-12-02 13:13:57,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:13:57,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:13:57,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:13:57,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:13:57,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:13:57,072 INFO L87 Difference]: Start difference. First operand 368823 states and 492390 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)