./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.04.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/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_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.04.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/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_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/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 d4710f8f3a918a0191222414f5c33a367ff98c09c2e8598fa3213223c4c35dba --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 08:18:34,101 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 08:18:34,165 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 08:18:34,171 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 08:18:34,171 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 08:18:34,197 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 08:18:34,198 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 08:18:34,198 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 08:18:34,199 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 08:18:34,199 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 08:18:34,200 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 08:18:34,201 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 08:18:34,201 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 08:18:34,202 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 08:18:34,202 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 08:18:34,203 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 08:18:34,203 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 08:18:34,204 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 08:18:34,204 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 08:18:34,205 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 08:18:34,206 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 08:18:34,207 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 08:18:34,208 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 08:18:34,208 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 08:18:34,209 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 08:18:34,209 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 08:18:34,210 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 08:18:34,210 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 08:18:34,211 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 08:18:34,211 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 08:18:34,211 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 08:18:34,212 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 08:18:34,212 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 08:18:34,212 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 08:18:34,212 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 08:18:34,213 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 08:18:34,213 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 08:18:34,213 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 08:18:34,213 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 08:18:34,213 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 08:18:34,214 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 08:18:34,214 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 08:18:34,214 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 08:18:34,214 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 08:18:34,215 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 08:18:34,215 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 08:18:34,215 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 08:18:34,215 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_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4710f8f3a918a0191222414f5c33a367ff98c09c2e8598fa3213223c4c35dba [2023-12-02 08:18:34,413 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 08:18:34,434 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 08:18:34,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 08:18:34,438 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 08:18:34,438 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 08:18:34,439 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/systemc/token_ring.04.cil-1.c [2023-12-02 08:18:37,210 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 08:18:37,377 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 08:18:37,378 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/sv-benchmarks/c/systemc/token_ring.04.cil-1.c [2023-12-02 08:18:37,388 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/data/bb541b554/51b98dc20f9c486eaf7491515cc529a4/FLAG7148458d7 [2023-12-02 08:18:37,400 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/data/bb541b554/51b98dc20f9c486eaf7491515cc529a4 [2023-12-02 08:18:37,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 08:18:37,404 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 08:18:37,405 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 08:18:37,405 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 08:18:37,410 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 08:18:37,411 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:18:37" (1/1) ... [2023-12-02 08:18:37,412 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4049903e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:18:37, skipping insertion in model container [2023-12-02 08:18:37,413 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:18:37" (1/1) ... [2023-12-02 08:18:37,453 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 08:18:37,574 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_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/sv-benchmarks/c/systemc/token_ring.04.cil-1.c[671,684] [2023-12-02 08:18:37,639 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 08:18:37,648 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 08:18:37,657 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_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/sv-benchmarks/c/systemc/token_ring.04.cil-1.c[671,684] [2023-12-02 08:18:37,685 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 08:18:37,700 INFO L206 MainTranslator]: Completed translation [2023-12-02 08:18:37,701 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:18:37 WrapperNode [2023-12-02 08:18:37,701 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 08:18:37,702 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 08:18:37,702 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 08:18:37,702 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 08:18:37,708 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:18:37" (1/1) ... [2023-12-02 08:18:37,716 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:18:37" (1/1) ... [2023-12-02 08:18:37,742 INFO L138 Inliner]: procedures = 36, calls = 43, calls flagged for inlining = 20, calls inlined = 20, statements flattened = 399 [2023-12-02 08:18:37,742 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 08:18:37,743 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 08:18:37,743 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 08:18:37,743 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 08:18:37,753 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:18:37" (1/1) ... [2023-12-02 08:18:37,753 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:18:37" (1/1) ... [2023-12-02 08:18:37,757 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:18:37" (1/1) ... [2023-12-02 08:18:37,757 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:18:37" (1/1) ... [2023-12-02 08:18:37,766 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:18:37" (1/1) ... [2023-12-02 08:18:37,774 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:18:37" (1/1) ... [2023-12-02 08:18:37,777 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:18:37" (1/1) ... [2023-12-02 08:18:37,779 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:18:37" (1/1) ... [2023-12-02 08:18:37,783 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 08:18:37,784 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 08:18:37,784 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 08:18:37,784 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 08:18:37,785 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:18:37" (1/1) ... [2023-12-02 08:18:37,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 08:18:37,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:18:37,815 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 08:18:37,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 08:18:37,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 08:18:37,851 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-12-02 08:18:37,851 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-12-02 08:18:37,851 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-12-02 08:18:37,851 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-12-02 08:18:37,851 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 08:18:37,851 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 08:18:37,851 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-12-02 08:18:37,852 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-12-02 08:18:37,852 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-12-02 08:18:37,852 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-12-02 08:18:37,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 08:18:37,852 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-12-02 08:18:37,852 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-12-02 08:18:37,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 08:18:37,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 08:18:37,946 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 08:18:37,948 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 08:18:38,331 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 08:18:38,543 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 08:18:38,543 INFO L309 CfgBuilder]: Removed 7 assume(true) statements. [2023-12-02 08:18:38,545 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:18:38 BoogieIcfgContainer [2023-12-02 08:18:38,545 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 08:18:38,547 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 08:18:38,547 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 08:18:38,551 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 08:18:38,551 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 08:18:37" (1/3) ... [2023-12-02 08:18:38,552 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ccc15a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:18:38, skipping insertion in model container [2023-12-02 08:18:38,552 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:18:37" (2/3) ... [2023-12-02 08:18:38,552 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ccc15a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:18:38, skipping insertion in model container [2023-12-02 08:18:38,552 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:18:38" (3/3) ... [2023-12-02 08:18:38,554 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.04.cil-1.c [2023-12-02 08:18:38,572 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 08:18:38,572 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 08:18:38,615 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 08:18:38,620 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;@653cd382, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 08:18:38,620 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 08:18:38,624 INFO L276 IsEmpty]: Start isEmpty. Operand has 105 states, 79 states have (on average 1.481012658227848) internal successors, (117), 81 states have internal predecessors, (117), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-12-02 08:18:38,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 08:18:38,632 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:18:38,632 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] [2023-12-02 08:18:38,633 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:18:38,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:18:38,636 INFO L85 PathProgramCache]: Analyzing trace with hash 385521257, now seen corresponding path program 1 times [2023-12-02 08:18:38,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:18:38,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735839705] [2023-12-02 08:18:38,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:38,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:18:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:38,951 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 08:18:38,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:18:38,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735839705] [2023-12-02 08:18:38,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735839705] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:18:38,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:18:38,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 08:18:38,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421582660] [2023-12-02 08:18:38,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:18:38,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 08:18:38,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:18:38,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 08:18:38,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 08:18:38,989 INFO L87 Difference]: Start difference. First operand has 105 states, 79 states have (on average 1.481012658227848) internal successors, (117), 81 states have internal predecessors, (117), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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 08:18:39,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:18:39,269 INFO L93 Difference]: Finished difference Result 298 states and 449 transitions. [2023-12-02 08:18:39,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 08:18:39,272 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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 42 [2023-12-02 08:18:39,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:18:39,282 INFO L225 Difference]: With dead ends: 298 [2023-12-02 08:18:39,282 INFO L226 Difference]: Without dead ends: 194 [2023-12-02 08:18:39,286 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 08:18:39,290 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 254 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:18:39,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 382 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 08:18:39,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-12-02 08:18:39,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2023-12-02 08:18:39,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 148 states have (on average 1.3918918918918919) internal successors, (206), 150 states have internal predecessors, (206), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2023-12-02 08:18:39,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 270 transitions. [2023-12-02 08:18:39,351 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 270 transitions. Word has length 42 [2023-12-02 08:18:39,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:18:39,352 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 270 transitions. [2023-12-02 08:18:39,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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 08:18:39,353 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 270 transitions. [2023-12-02 08:18:39,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-12-02 08:18:39,358 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:18:39,358 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:18:39,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 08:18:39,359 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:18:39,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:18:39,360 INFO L85 PathProgramCache]: Analyzing trace with hash 480408375, now seen corresponding path program 1 times [2023-12-02 08:18:39,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:18:39,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656129682] [2023-12-02 08:18:39,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:39,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:18:39,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:39,548 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 08:18:39,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:18:39,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656129682] [2023-12-02 08:18:39,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656129682] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:18:39,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007228580] [2023-12-02 08:18:39,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:39,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:18:39,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:18:39,551 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:18:39,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 08:18:39,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:39,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 08:18:39,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:18:39,761 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 08:18:39,762 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:18:39,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007228580] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:18:39,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:18:39,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 08:18:39,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055044489] [2023-12-02 08:18:39,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:18:39,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:18:39,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:18:39,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:18:39,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:18:39,766 INFO L87 Difference]: Start difference. First operand 193 states and 270 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 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 08:18:39,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:18:39,867 INFO L93 Difference]: Finished difference Result 562 states and 797 transitions. [2023-12-02 08:18:39,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:18:39,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 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 80 [2023-12-02 08:18:39,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:18:39,873 INFO L225 Difference]: With dead ends: 562 [2023-12-02 08:18:39,874 INFO L226 Difference]: Without dead ends: 374 [2023-12-02 08:18:39,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 80 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 08:18:39,878 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 122 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:18:39,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 266 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:18:39,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-12-02 08:18:39,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 370. [2023-12-02 08:18:39,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 287 states have (on average 1.3832752613240418) internal successors, (397), 290 states have internal predecessors, (397), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (58), 56 states have call predecessors, (58), 58 states have call successors, (58) [2023-12-02 08:18:39,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 513 transitions. [2023-12-02 08:18:39,925 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 513 transitions. Word has length 80 [2023-12-02 08:18:39,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:18:39,926 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 513 transitions. [2023-12-02 08:18:39,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 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 08:18:39,927 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 513 transitions. [2023-12-02 08:18:39,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-12-02 08:18:39,930 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:18:39,931 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:18:39,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 08:18:40,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-02 08:18:40,136 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:18:40,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:18:40,136 INFO L85 PathProgramCache]: Analyzing trace with hash -586143913, now seen corresponding path program 1 times [2023-12-02 08:18:40,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:18:40,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757815394] [2023-12-02 08:18:40,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:40,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:18:40,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:40,302 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 08:18:40,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:18:40,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757815394] [2023-12-02 08:18:40,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757815394] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:18:40,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971568003] [2023-12-02 08:18:40,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:40,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:18:40,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:18:40,323 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:18:40,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 08:18:40,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:40,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 08:18:40,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:18:40,520 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 08:18:40,520 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:18:40,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971568003] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:18:40,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:18:40,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 08:18:40,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815707773] [2023-12-02 08:18:40,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:18:40,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:18:40,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:18:40,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:18:40,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:18:40,522 INFO L87 Difference]: Start difference. First operand 370 states and 513 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 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 08:18:40,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:18:40,638 INFO L93 Difference]: Finished difference Result 1087 states and 1528 transitions. [2023-12-02 08:18:40,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:18:40,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 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 80 [2023-12-02 08:18:40,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:18:40,646 INFO L225 Difference]: With dead ends: 1087 [2023-12-02 08:18:40,646 INFO L226 Difference]: Without dead ends: 722 [2023-12-02 08:18:40,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 80 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 08:18:40,649 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 119 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:18:40,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 229 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:18:40,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2023-12-02 08:18:40,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 716. [2023-12-02 08:18:40,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 559 states have (on average 1.372093023255814) internal successors, (767), 564 states have internal predecessors, (767), 108 states have call successors, (108), 48 states have call predecessors, (108), 48 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2023-12-02 08:18:40,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 983 transitions. [2023-12-02 08:18:40,718 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 983 transitions. Word has length 80 [2023-12-02 08:18:40,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:18:40,718 INFO L495 AbstractCegarLoop]: Abstraction has 716 states and 983 transitions. [2023-12-02 08:18:40,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 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 08:18:40,719 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 983 transitions. [2023-12-02 08:18:40,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-12-02 08:18:40,722 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:18:40,723 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:18:40,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 08:18:40,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:18:40,927 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:18:40,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:18:40,928 INFO L85 PathProgramCache]: Analyzing trace with hash 133949239, now seen corresponding path program 1 times [2023-12-02 08:18:40,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:18:40,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086470941] [2023-12-02 08:18:40,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:40,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:18:40,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-02 08:18:41,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:18:41,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086470941] [2023-12-02 08:18:41,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086470941] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:18:41,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:18:41,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 08:18:41,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705438668] [2023-12-02 08:18:41,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:18:41,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 08:18:41,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:18:41,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 08:18:41,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:18:41,386 INFO L87 Difference]: Start difference. First operand 716 states and 983 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 08:18:41,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:18:41,801 INFO L93 Difference]: Finished difference Result 2216 states and 3049 transitions. [2023-12-02 08:18:41,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 08:18:41,802 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 80 [2023-12-02 08:18:41,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:18:41,814 INFO L225 Difference]: With dead ends: 2216 [2023-12-02 08:18:41,814 INFO L226 Difference]: Without dead ends: 1506 [2023-12-02 08:18:41,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 08:18:41,818 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 351 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 08:18:41,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 347 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 08:18:41,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2023-12-02 08:18:41,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1376. [2023-12-02 08:18:41,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1075 states have (on average 1.3572093023255813) internal successors, (1459), 1084 states have internal predecessors, (1459), 204 states have call successors, (204), 96 states have call predecessors, (204), 96 states have return successors, (204), 196 states have call predecessors, (204), 204 states have call successors, (204) [2023-12-02 08:18:41,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 1867 transitions. [2023-12-02 08:18:41,937 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 1867 transitions. Word has length 80 [2023-12-02 08:18:41,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:18:41,938 INFO L495 AbstractCegarLoop]: Abstraction has 1376 states and 1867 transitions. [2023-12-02 08:18:41,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 08:18:41,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 1867 transitions. [2023-12-02 08:18:41,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-02 08:18:41,943 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:18:41,943 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:18:41,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 08:18:41,944 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:18:41,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:18:41,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1768166598, now seen corresponding path program 1 times [2023-12-02 08:18:41,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:18:41,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347463487] [2023-12-02 08:18:41,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:41,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:18:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:42,179 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 08:18:42,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:18:42,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347463487] [2023-12-02 08:18:42,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347463487] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:18:42,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895635866] [2023-12-02 08:18:42,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:42,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:18:42,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:18:42,182 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:18:42,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 08:18:42,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:42,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 08:18:42,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:18:42,374 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 08:18:42,374 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:18:42,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895635866] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:18:42,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:18:42,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 08:18:42,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133217411] [2023-12-02 08:18:42,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:18:42,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:18:42,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:18:42,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:18:42,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 08:18:42,377 INFO L87 Difference]: Start difference. First operand 1376 states and 1867 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 08:18:42,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:18:42,532 INFO L93 Difference]: Finished difference Result 2454 states and 3360 transitions. [2023-12-02 08:18:42,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:18:42,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 95 [2023-12-02 08:18:42,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:18:42,545 INFO L225 Difference]: With dead ends: 2454 [2023-12-02 08:18:42,545 INFO L226 Difference]: Without dead ends: 1748 [2023-12-02 08:18:42,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 97 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 08:18:42,549 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 57 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:18:42,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 307 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:18:42,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2023-12-02 08:18:42,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 1608. [2023-12-02 08:18:42,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1291 states have (on average 1.3841982958946553) internal successors, (1787), 1300 states have internal predecessors, (1787), 212 states have call successors, (212), 104 states have call predecessors, (212), 104 states have return successors, (212), 204 states have call predecessors, (212), 212 states have call successors, (212) [2023-12-02 08:18:42,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 2211 transitions. [2023-12-02 08:18:42,667 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 2211 transitions. Word has length 95 [2023-12-02 08:18:42,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:18:42,667 INFO L495 AbstractCegarLoop]: Abstraction has 1608 states and 2211 transitions. [2023-12-02 08:18:42,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 08:18:42,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 2211 transitions. [2023-12-02 08:18:42,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-02 08:18:42,674 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:18:42,675 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:18:42,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 08:18:42,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:18:42,875 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:18:42,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:18:42,876 INFO L85 PathProgramCache]: Analyzing trace with hash -453664688, now seen corresponding path program 1 times [2023-12-02 08:18:42,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:18:42,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362468370] [2023-12-02 08:18:42,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:42,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:18:42,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:43,073 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 08:18:43,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:18:43,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362468370] [2023-12-02 08:18:43,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362468370] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:18:43,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597308154] [2023-12-02 08:18:43,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:43,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:18:43,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:18:43,075 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:18:43,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 08:18:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:43,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 08:18:43,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:18:43,345 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 08:18:43,345 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:18:43,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597308154] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:18:43,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:18:43,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-12-02 08:18:43,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208351894] [2023-12-02 08:18:43,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:18:43,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:18:43,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:18:43,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:18:43,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 08:18:43,348 INFO L87 Difference]: Start difference. First operand 1608 states and 2211 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 08:18:43,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:18:43,561 INFO L93 Difference]: Finished difference Result 4765 states and 6624 transitions. [2023-12-02 08:18:43,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:18:43,562 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 122 [2023-12-02 08:18:43,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:18:43,582 INFO L225 Difference]: With dead ends: 4765 [2023-12-02 08:18:43,582 INFO L226 Difference]: Without dead ends: 3162 [2023-12-02 08:18:43,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 124 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 08:18:43,588 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 77 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:18:43,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 229 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:18:43,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3162 states. [2023-12-02 08:18:43,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3162 to 3136. [2023-12-02 08:18:43,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3136 states, 2523 states have (on average 1.370986920332937) internal successors, (3459), 2540 states have internal predecessors, (3459), 404 states have call successors, (404), 208 states have call predecessors, (404), 208 states have return successors, (404), 388 states have call predecessors, (404), 404 states have call successors, (404) [2023-12-02 08:18:43,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3136 states to 3136 states and 4267 transitions. [2023-12-02 08:18:43,780 INFO L78 Accepts]: Start accepts. Automaton has 3136 states and 4267 transitions. Word has length 122 [2023-12-02 08:18:43,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:18:43,781 INFO L495 AbstractCegarLoop]: Abstraction has 3136 states and 4267 transitions. [2023-12-02 08:18:43,781 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 08:18:43,781 INFO L276 IsEmpty]: Start isEmpty. Operand 3136 states and 4267 transitions. [2023-12-02 08:18:43,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-12-02 08:18:43,791 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:18:43,791 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:18:43,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 08:18:44,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 08:18:44,010 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:18:44,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:18:44,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1067479712, now seen corresponding path program 1 times [2023-12-02 08:18:44,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:18:44,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826277416] [2023-12-02 08:18:44,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:44,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:18:44,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-02 08:18:44,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:18:44,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826277416] [2023-12-02 08:18:44,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826277416] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:18:44,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:18:44,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 08:18:44,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718236390] [2023-12-02 08:18:44,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:18:44,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:18:44,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:18:44,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:18:44,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 08:18:44,089 INFO L87 Difference]: Start difference. First operand 3136 states and 4267 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 08:18:44,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:18:44,380 INFO L93 Difference]: Finished difference Result 7825 states and 10712 transitions. [2023-12-02 08:18:44,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:18:44,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 107 [2023-12-02 08:18:44,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:18:44,411 INFO L225 Difference]: With dead ends: 7825 [2023-12-02 08:18:44,411 INFO L226 Difference]: Without dead ends: 4694 [2023-12-02 08:18:44,422 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 08:18:44,422 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 114 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:18:44,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 265 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:18:44,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4694 states. [2023-12-02 08:18:44,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4694 to 4668. [2023-12-02 08:18:44,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4668 states, 3759 states have (on average 1.3586060122372972) internal successors, (5107), 3784 states have internal predecessors, (5107), 596 states have call successors, (596), 312 states have call predecessors, (596), 312 states have return successors, (596), 572 states have call predecessors, (596), 596 states have call successors, (596) [2023-12-02 08:18:44,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4668 states to 4668 states and 6299 transitions. [2023-12-02 08:18:44,710 INFO L78 Accepts]: Start accepts. Automaton has 4668 states and 6299 transitions. Word has length 107 [2023-12-02 08:18:44,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:18:44,711 INFO L495 AbstractCegarLoop]: Abstraction has 4668 states and 6299 transitions. [2023-12-02 08:18:44,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 08:18:44,711 INFO L276 IsEmpty]: Start isEmpty. Operand 4668 states and 6299 transitions. [2023-12-02 08:18:44,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-02 08:18:44,729 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:18:44,729 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:18:44,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 08:18:44,730 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:18:44,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:18:44,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1637310925, now seen corresponding path program 1 times [2023-12-02 08:18:44,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:18:44,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584606442] [2023-12-02 08:18:44,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:44,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:18:44,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:44,862 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-02 08:18:44,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:18:44,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584606442] [2023-12-02 08:18:44,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584606442] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:18:44,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409919438] [2023-12-02 08:18:44,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:44,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:18:44,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:18:44,867 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:18:44,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 08:18:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:45,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 08:18:45,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:18:45,050 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 08:18:45,051 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:18:45,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409919438] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:18:45,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:18:45,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 08:18:45,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681512453] [2023-12-02 08:18:45,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:18:45,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:18:45,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:18:45,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:18:45,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:18:45,053 INFO L87 Difference]: Start difference. First operand 4668 states and 6299 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 08:18:45,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:18:45,357 INFO L93 Difference]: Finished difference Result 8804 states and 12013 transitions. [2023-12-02 08:18:45,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:18:45,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 122 [2023-12-02 08:18:45,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:18:45,392 INFO L225 Difference]: With dead ends: 8804 [2023-12-02 08:18:45,392 INFO L226 Difference]: Without dead ends: 5674 [2023-12-02 08:18:45,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 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 08:18:45,402 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 66 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:18:45,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 300 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:18:45,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2023-12-02 08:18:45,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 5288. [2023-12-02 08:18:45,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5288 states, 4331 states have (on average 1.3823597321634726) internal successors, (5987), 4356 states have internal predecessors, (5987), 620 states have call successors, (620), 336 states have call predecessors, (620), 336 states have return successors, (620), 596 states have call predecessors, (620), 620 states have call successors, (620) [2023-12-02 08:18:45,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5288 states to 5288 states and 7227 transitions. [2023-12-02 08:18:45,765 INFO L78 Accepts]: Start accepts. Automaton has 5288 states and 7227 transitions. Word has length 122 [2023-12-02 08:18:45,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:18:45,766 INFO L495 AbstractCegarLoop]: Abstraction has 5288 states and 7227 transitions. [2023-12-02 08:18:45,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 08:18:45,766 INFO L276 IsEmpty]: Start isEmpty. Operand 5288 states and 7227 transitions. [2023-12-02 08:18:45,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-02 08:18:45,788 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:18:45,788 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:18:45,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 08:18:45,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-02 08:18:45,989 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:18:45,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:18:45,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1550777155, now seen corresponding path program 2 times [2023-12-02 08:18:45,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:18:45,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521741531] [2023-12-02 08:18:45,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:45,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:18:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:46,232 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 08:18:46,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:18:46,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521741531] [2023-12-02 08:18:46,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521741531] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:18:46,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163663061] [2023-12-02 08:18:46,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 08:18:46,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:18:46,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:18:46,234 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:18:46,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 08:18:46,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 08:18:46,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:18:46,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 08:18:46,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:18:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 08:18:46,384 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:18:46,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163663061] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:18:46,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:18:46,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 08:18:46,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212689172] [2023-12-02 08:18:46,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:18:46,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:18:46,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:18:46,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:18:46,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 08:18:46,386 INFO L87 Difference]: Start difference. First operand 5288 states and 7227 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 08:18:46,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:18:46,686 INFO L93 Difference]: Finished difference Result 9056 states and 12621 transitions. [2023-12-02 08:18:46,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:18:46,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 122 [2023-12-02 08:18:46,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:18:46,720 INFO L225 Difference]: With dead ends: 9056 [2023-12-02 08:18:46,720 INFO L226 Difference]: Without dead ends: 5306 [2023-12-02 08:18:46,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 124 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 08:18:46,734 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 125 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:18:46,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 302 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:18:46,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5306 states. [2023-12-02 08:18:47,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5306 to 5272. [2023-12-02 08:18:47,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5272 states, 4315 states have (on average 1.3652375434530706) internal successors, (5891), 4340 states have internal predecessors, (5891), 620 states have call successors, (620), 336 states have call predecessors, (620), 336 states have return successors, (620), 596 states have call predecessors, (620), 620 states have call successors, (620) [2023-12-02 08:18:47,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5272 states to 5272 states and 7131 transitions. [2023-12-02 08:18:47,067 INFO L78 Accepts]: Start accepts. Automaton has 5272 states and 7131 transitions. Word has length 122 [2023-12-02 08:18:47,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:18:47,068 INFO L495 AbstractCegarLoop]: Abstraction has 5272 states and 7131 transitions. [2023-12-02 08:18:47,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 08:18:47,068 INFO L276 IsEmpty]: Start isEmpty. Operand 5272 states and 7131 transitions. [2023-12-02 08:18:47,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-02 08:18:47,085 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:18:47,086 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:18:47,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 08:18:47,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:18:47,286 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:18:47,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:18:47,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1002751557, now seen corresponding path program 1 times [2023-12-02 08:18:47,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:18:47,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510620834] [2023-12-02 08:18:47,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:47,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:18:47,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:47,439 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 08:18:47,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:18:47,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510620834] [2023-12-02 08:18:47,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510620834] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:18:47,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29551621] [2023-12-02 08:18:47,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:47,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:18:47,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:18:47,441 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:18:47,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 08:18:47,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:47,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 08:18:47,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:18:47,636 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 08:18:47,636 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:18:47,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29551621] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:18:47,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:18:47,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 08:18:47,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389221528] [2023-12-02 08:18:47,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:18:47,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:18:47,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:18:47,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:18:47,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 08:18:47,639 INFO L87 Difference]: Start difference. First operand 5272 states and 7131 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 08:18:47,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:18:47,846 INFO L93 Difference]: Finished difference Result 9870 states and 13302 transitions. [2023-12-02 08:18:47,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:18:47,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 122 [2023-12-02 08:18:47,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:18:47,880 INFO L225 Difference]: With dead ends: 9870 [2023-12-02 08:18:47,880 INFO L226 Difference]: Without dead ends: 6348 [2023-12-02 08:18:47,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 124 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 08:18:47,891 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 123 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 08:18:47,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 164 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 08:18:47,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6348 states. [2023-12-02 08:18:48,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6348 to 6348. [2023-12-02 08:18:48,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6348 states, 5255 states have (on average 1.3318744053282587) internal successors, (6999), 5280 states have internal predecessors, (6999), 664 states have call successors, (664), 428 states have call predecessors, (664), 428 states have return successors, (664), 640 states have call predecessors, (664), 664 states have call successors, (664) [2023-12-02 08:18:48,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6348 states to 6348 states and 8327 transitions. [2023-12-02 08:18:48,225 INFO L78 Accepts]: Start accepts. Automaton has 6348 states and 8327 transitions. Word has length 122 [2023-12-02 08:18:48,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:18:48,226 INFO L495 AbstractCegarLoop]: Abstraction has 6348 states and 8327 transitions. [2023-12-02 08:18:48,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 08:18:48,227 INFO L276 IsEmpty]: Start isEmpty. Operand 6348 states and 8327 transitions. [2023-12-02 08:18:48,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 08:18:48,239 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:18:48,239 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:18:48,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 08:18:48,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:18:48,440 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:18:48,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:18:48,441 INFO L85 PathProgramCache]: Analyzing trace with hash 851953762, now seen corresponding path program 1 times [2023-12-02 08:18:48,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:18:48,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148797029] [2023-12-02 08:18:48,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:48,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:18:48,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:48,643 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 08:18:48,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:18:48,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148797029] [2023-12-02 08:18:48,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148797029] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:18:48,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700630351] [2023-12-02 08:18:48,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:48,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:18:48,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:18:48,644 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:18:48,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 08:18:48,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:48,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 08:18:48,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:18:48,861 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 08:18:48,861 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:18:48,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700630351] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:18:48,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:18:48,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 08:18:48,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358586306] [2023-12-02 08:18:48,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:18:48,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:18:48,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:18:48,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:18:48,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 08:18:48,863 INFO L87 Difference]: Start difference. First operand 6348 states and 8327 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (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 08:18:49,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:18:49,283 INFO L93 Difference]: Finished difference Result 15182 states and 20188 transitions. [2023-12-02 08:18:49,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:18:49,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (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 123 [2023-12-02 08:18:49,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:18:49,317 INFO L225 Difference]: With dead ends: 15182 [2023-12-02 08:18:49,317 INFO L226 Difference]: Without dead ends: 8840 [2023-12-02 08:18:49,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 125 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 08:18:49,377 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 62 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:18:49,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 245 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:18:49,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8840 states. [2023-12-02 08:18:49,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8840 to 7196. [2023-12-02 08:18:49,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7196 states, 6035 states have (on average 1.3539353769676885) internal successors, (8171), 6061 states have internal predecessors, (8171), 698 states have call successors, (698), 462 states have call predecessors, (698), 462 states have return successors, (698), 673 states have call predecessors, (698), 698 states have call successors, (698) [2023-12-02 08:18:49,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7196 states to 7196 states and 9567 transitions. [2023-12-02 08:18:49,773 INFO L78 Accepts]: Start accepts. Automaton has 7196 states and 9567 transitions. Word has length 123 [2023-12-02 08:18:49,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:18:49,774 INFO L495 AbstractCegarLoop]: Abstraction has 7196 states and 9567 transitions. [2023-12-02 08:18:49,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (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 08:18:49,774 INFO L276 IsEmpty]: Start isEmpty. Operand 7196 states and 9567 transitions. [2023-12-02 08:18:49,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-12-02 08:18:49,794 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:18:49,794 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 08:18:49,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 08:18:49,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:18:49,995 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:18:49,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:18:49,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1332915149, now seen corresponding path program 1 times [2023-12-02 08:18:49,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:18:49,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251434257] [2023-12-02 08:18:49,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:49,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:18:50,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:50,186 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 08:18:50,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:18:50,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251434257] [2023-12-02 08:18:50,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251434257] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:18:50,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376038604] [2023-12-02 08:18:50,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:50,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:18:50,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:18:50,188 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:18:50,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 08:18:50,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:50,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 08:18:50,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:18:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 08:18:50,463 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:18:50,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376038604] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:18:50,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:18:50,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2023-12-02 08:18:50,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956550378] [2023-12-02 08:18:50,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:18:50,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 08:18:50,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:18:50,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 08:18:50,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-12-02 08:18:50,465 INFO L87 Difference]: Start difference. First operand 7196 states and 9567 transitions. Second operand has 6 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 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 08:18:51,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:18:51,339 INFO L93 Difference]: Finished difference Result 17748 states and 23545 transitions. [2023-12-02 08:18:51,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 08:18:51,340 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 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 125 [2023-12-02 08:18:51,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:18:51,378 INFO L225 Difference]: With dead ends: 17748 [2023-12-02 08:18:51,378 INFO L226 Difference]: Without dead ends: 10558 [2023-12-02 08:18:51,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-12-02 08:18:51,397 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 374 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:18:51,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 273 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 08:18:51,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10558 states. [2023-12-02 08:18:52,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10558 to 10556. [2023-12-02 08:18:52,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10556 states, 8835 states have (on average 1.335483870967742) internal successors, (11799), 8873 states have internal predecessors, (11799), 1030 states have call successors, (1030), 690 states have call predecessors, (1030), 690 states have return successors, (1030), 993 states have call predecessors, (1030), 1030 states have call successors, (1030) [2023-12-02 08:18:52,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10556 states to 10556 states and 13859 transitions. [2023-12-02 08:18:52,099 INFO L78 Accepts]: Start accepts. Automaton has 10556 states and 13859 transitions. Word has length 125 [2023-12-02 08:18:52,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:18:52,099 INFO L495 AbstractCegarLoop]: Abstraction has 10556 states and 13859 transitions. [2023-12-02 08:18:52,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 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 08:18:52,099 INFO L276 IsEmpty]: Start isEmpty. Operand 10556 states and 13859 transitions. [2023-12-02 08:18:52,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-12-02 08:18:52,116 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:18:52,116 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:18:52,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 08:18:52,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:18:52,319 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:18:52,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:18:52,320 INFO L85 PathProgramCache]: Analyzing trace with hash 773643789, now seen corresponding path program 1 times [2023-12-02 08:18:52,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:18:52,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070230101] [2023-12-02 08:18:52,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:52,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:18:52,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:52,415 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-02 08:18:52,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:18:52,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070230101] [2023-12-02 08:18:52,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070230101] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:18:52,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034778083] [2023-12-02 08:18:52,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:52,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:18:52,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:18:52,417 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:18:52,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 08:18:52,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:52,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 08:18:52,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:18:52,585 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 08:18:52,585 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:18:52,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034778083] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:18:52,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:18:52,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 08:18:52,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333460287] [2023-12-02 08:18:52,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:18:52,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:18:52,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:18:52,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:18:52,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:18:52,587 INFO L87 Difference]: Start difference. First operand 10556 states and 13859 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (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 08:18:53,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:18:53,118 INFO L93 Difference]: Finished difference Result 20376 states and 27005 transitions. [2023-12-02 08:18:53,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:18:53,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (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 127 [2023-12-02 08:18:53,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:18:53,157 INFO L225 Difference]: With dead ends: 20376 [2023-12-02 08:18:53,157 INFO L226 Difference]: Without dead ends: 13338 [2023-12-02 08:18:53,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 127 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 08:18:53,173 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 83 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:18:53,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 322 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:18:53,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13338 states. [2023-12-02 08:18:53,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13338 to 12012. [2023-12-02 08:18:53,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12012 states, 10163 states have (on average 1.3530453606218635) internal successors, (13751), 10201 states have internal predecessors, (13751), 1094 states have call successors, (1094), 754 states have call predecessors, (1094), 754 states have return successors, (1094), 1057 states have call predecessors, (1094), 1094 states have call successors, (1094) [2023-12-02 08:18:53,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12012 states to 12012 states and 15939 transitions. [2023-12-02 08:18:53,779 INFO L78 Accepts]: Start accepts. Automaton has 12012 states and 15939 transitions. Word has length 127 [2023-12-02 08:18:53,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:18:53,779 INFO L495 AbstractCegarLoop]: Abstraction has 12012 states and 15939 transitions. [2023-12-02 08:18:53,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (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 08:18:53,779 INFO L276 IsEmpty]: Start isEmpty. Operand 12012 states and 15939 transitions. [2023-12-02 08:18:53,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-12-02 08:18:53,797 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:18:53,797 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:18:53,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 08:18:53,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:18:53,998 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:18:53,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:18:53,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1831014383, now seen corresponding path program 1 times [2023-12-02 08:18:53,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:18:53,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165376219] [2023-12-02 08:18:53,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:53,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:18:54,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:54,147 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 08:18:54,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:18:54,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165376219] [2023-12-02 08:18:54,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165376219] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:18:54,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721791529] [2023-12-02 08:18:54,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:54,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:18:54,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:18:54,149 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:18:54,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 08:18:54,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:54,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 08:18:54,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:18:54,336 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 08:18:54,336 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:18:54,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721791529] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:18:54,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:18:54,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 08:18:54,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468714819] [2023-12-02 08:18:54,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:18:54,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:18:54,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:18:54,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:18:54,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 08:18:54,338 INFO L87 Difference]: Start difference. First operand 12012 states and 15939 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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 08:18:54,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:18:54,936 INFO L93 Difference]: Finished difference Result 20532 states and 27677 transitions. [2023-12-02 08:18:54,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:18:54,937 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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 129 [2023-12-02 08:18:54,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:18:54,964 INFO L225 Difference]: With dead ends: 20532 [2023-12-02 08:18:54,964 INFO L226 Difference]: Without dead ends: 12038 [2023-12-02 08:18:54,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 131 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 08:18:54,979 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 105 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:18:54,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 317 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:18:54,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12038 states. [2023-12-02 08:18:55,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12038 to 11932. [2023-12-02 08:18:55,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11932 states, 10083 states have (on average 1.3336308638302092) internal successors, (13447), 10121 states have internal predecessors, (13447), 1094 states have call successors, (1094), 754 states have call predecessors, (1094), 754 states have return successors, (1094), 1057 states have call predecessors, (1094), 1094 states have call successors, (1094) [2023-12-02 08:18:55,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11932 states to 11932 states and 15635 transitions. [2023-12-02 08:18:55,615 INFO L78 Accepts]: Start accepts. Automaton has 11932 states and 15635 transitions. Word has length 129 [2023-12-02 08:18:55,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:18:55,615 INFO L495 AbstractCegarLoop]: Abstraction has 11932 states and 15635 transitions. [2023-12-02 08:18:55,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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 08:18:55,616 INFO L276 IsEmpty]: Start isEmpty. Operand 11932 states and 15635 transitions. [2023-12-02 08:18:55,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-12-02 08:18:55,628 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:18:55,628 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:18:55,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 08:18:55,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 08:18:55,830 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:18:55,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:18:55,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1216685459, now seen corresponding path program 1 times [2023-12-02 08:18:55,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:18:55,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635103581] [2023-12-02 08:18:55,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:55,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:18:55,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:55,985 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 08:18:55,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:18:55,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635103581] [2023-12-02 08:18:55,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635103581] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:18:55,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486615603] [2023-12-02 08:18:55,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:55,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:18:55,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:18:55,986 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:18:55,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 08:18:56,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:56,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 08:18:56,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:18:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 08:18:56,171 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:18:56,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486615603] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:18:56,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:18:56,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-12-02 08:18:56,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124624299] [2023-12-02 08:18:56,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:18:56,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 08:18:56,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:18:56,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 08:18:56,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 08:18:56,173 INFO L87 Difference]: Start difference. First operand 11932 states and 15635 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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 08:18:56,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:18:56,627 INFO L93 Difference]: Finished difference Result 16711 states and 21883 transitions. [2023-12-02 08:18:56,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 08:18:56,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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 129 [2023-12-02 08:18:56,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:18:56,661 INFO L225 Difference]: With dead ends: 16711 [2023-12-02 08:18:56,662 INFO L226 Difference]: Without dead ends: 12435 [2023-12-02 08:18:56,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 130 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 08:18:56,672 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 111 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:18:56,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 456 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:18:56,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12435 states. [2023-12-02 08:18:57,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12435 to 12325. [2023-12-02 08:18:57,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12325 states, 10417 states have (on average 1.329269463377172) internal successors, (13847), 10479 states have internal predecessors, (13847), 1101 states have call successors, (1101), 758 states have call predecessors, (1101), 806 states have return successors, (1149), 1088 states have call predecessors, (1149), 1101 states have call successors, (1149) [2023-12-02 08:18:57,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12325 states to 12325 states and 16097 transitions. [2023-12-02 08:18:57,319 INFO L78 Accepts]: Start accepts. Automaton has 12325 states and 16097 transitions. Word has length 129 [2023-12-02 08:18:57,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:18:57,319 INFO L495 AbstractCegarLoop]: Abstraction has 12325 states and 16097 transitions. [2023-12-02 08:18:57,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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 08:18:57,319 INFO L276 IsEmpty]: Start isEmpty. Operand 12325 states and 16097 transitions. [2023-12-02 08:18:57,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-02 08:18:57,329 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:18:57,329 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 08:18:57,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 08:18:57,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 08:18:57,530 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:18:57,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:18:57,530 INFO L85 PathProgramCache]: Analyzing trace with hash 147322638, now seen corresponding path program 1 times [2023-12-02 08:18:57,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:18:57,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042313014] [2023-12-02 08:18:57,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:57,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:18:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:57,672 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-02 08:18:57,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:18:57,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042313014] [2023-12-02 08:18:57,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042313014] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:18:57,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634552257] [2023-12-02 08:18:57,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:57,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:18:57,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:18:57,674 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:18:57,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 08:18:57,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:57,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 08:18:57,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:18:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 08:18:57,837 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:18:57,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634552257] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:18:57,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:18:57,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 08:18:57,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926756081] [2023-12-02 08:18:57,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:18:57,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:18:57,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:18:57,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:18:57,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 08:18:57,839 INFO L87 Difference]: Start difference. First operand 12325 states and 16097 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 08:18:58,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:18:58,257 INFO L93 Difference]: Finished difference Result 16717 states and 21956 transitions. [2023-12-02 08:18:58,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:18:58,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 130 [2023-12-02 08:18:58,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:18:58,279 INFO L225 Difference]: With dead ends: 16717 [2023-12-02 08:18:58,279 INFO L226 Difference]: Without dead ends: 11889 [2023-12-02 08:18:58,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 132 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 08:18:58,287 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 28 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 08:18:58,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 252 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 08:18:58,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11889 states. [2023-12-02 08:18:58,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11889 to 11261. [2023-12-02 08:18:58,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11261 states, 9497 states have (on average 1.3401074023375803) internal successors, (12727), 9523 states have internal predecessors, (12727), 1053 states have call successors, (1053), 710 states have call predecessors, (1053), 710 states have return successors, (1053), 1028 states have call predecessors, (1053), 1053 states have call successors, (1053) [2023-12-02 08:18:58,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11261 states to 11261 states and 14833 transitions. [2023-12-02 08:18:58,769 INFO L78 Accepts]: Start accepts. Automaton has 11261 states and 14833 transitions. Word has length 130 [2023-12-02 08:18:58,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:18:58,769 INFO L495 AbstractCegarLoop]: Abstraction has 11261 states and 14833 transitions. [2023-12-02 08:18:58,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 08:18:58,769 INFO L276 IsEmpty]: Start isEmpty. Operand 11261 states and 14833 transitions. [2023-12-02 08:18:58,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-12-02 08:18:58,779 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:18:58,779 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 08:18:58,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 08:18:58,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 08:18:58,980 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:18:58,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:18:58,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1455838287, now seen corresponding path program 1 times [2023-12-02 08:18:58,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:18:58,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841207683] [2023-12-02 08:18:58,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:58,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:18:58,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:59,120 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 08:18:59,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:18:59,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841207683] [2023-12-02 08:18:59,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841207683] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:18:59,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308197834] [2023-12-02 08:18:59,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:18:59,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:18:59,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:18:59,123 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:18:59,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 08:18:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:18:59,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 08:18:59,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:18:59,358 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-02 08:18:59,359 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:18:59,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308197834] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:18:59,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:18:59,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2023-12-02 08:18:59,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152595142] [2023-12-02 08:18:59,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:18:59,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 08:18:59,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:18:59,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 08:18:59,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-12-02 08:18:59,361 INFO L87 Difference]: Start difference. First operand 11261 states and 14833 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 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 08:19:00,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:00,381 INFO L93 Difference]: Finished difference Result 27609 states and 36247 transitions. [2023-12-02 08:19:00,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 08:19:00,382 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 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 131 [2023-12-02 08:19:00,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:00,410 INFO L225 Difference]: With dead ends: 27609 [2023-12-02 08:19:00,410 INFO L226 Difference]: Without dead ends: 16399 [2023-12-02 08:19:00,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-12-02 08:19:00,423 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 344 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:00,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 329 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 08:19:00,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16399 states. [2023-12-02 08:19:01,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16399 to 16397. [2023-12-02 08:19:01,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16397 states, 13787 states have (on average 1.3139189091172845) internal successors, (18115), 13825 states have internal predecessors, (18115), 1551 states have call successors, (1551), 1058 states have call predecessors, (1551), 1058 states have return successors, (1551), 1514 states have call predecessors, (1551), 1551 states have call successors, (1551) [2023-12-02 08:19:01,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16397 states to 16397 states and 21217 transitions. [2023-12-02 08:19:01,340 INFO L78 Accepts]: Start accepts. Automaton has 16397 states and 21217 transitions. Word has length 131 [2023-12-02 08:19:01,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:01,340 INFO L495 AbstractCegarLoop]: Abstraction has 16397 states and 21217 transitions. [2023-12-02 08:19:01,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 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 08:19:01,341 INFO L276 IsEmpty]: Start isEmpty. Operand 16397 states and 21217 transitions. [2023-12-02 08:19:01,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-12-02 08:19:01,355 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:01,355 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 08:19:01,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 08:19:01,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 08:19:01,556 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:19:01,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:01,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1399117401, now seen corresponding path program 1 times [2023-12-02 08:19:01,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:01,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870425633] [2023-12-02 08:19:01,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:01,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 08:19:01,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:01,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870425633] [2023-12-02 08:19:01,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870425633] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:19:01,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444991779] [2023-12-02 08:19:01,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:01,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:01,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:19:01,746 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:19:01,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 08:19:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:01,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 08:19:01,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:19:01,959 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 08:19:01,960 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:19:01,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444991779] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:19:01,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:19:01,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-12-02 08:19:01,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257319621] [2023-12-02 08:19:01,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:19:01,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 08:19:01,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:19:01,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 08:19:01,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 08:19:01,962 INFO L87 Difference]: Start difference. First operand 16397 states and 21217 transitions. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 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 08:19:03,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:03,254 INFO L93 Difference]: Finished difference Result 40210 states and 51829 transitions. [2023-12-02 08:19:03,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 08:19:03,255 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 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 135 [2023-12-02 08:19:03,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:03,294 INFO L225 Difference]: With dead ends: 40210 [2023-12-02 08:19:03,294 INFO L226 Difference]: Without dead ends: 23864 [2023-12-02 08:19:03,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-12-02 08:19:03,315 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 334 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:03,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 318 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 08:19:03,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23864 states. [2023-12-02 08:19:04,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23864 to 23862. [2023-12-02 08:19:04,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23862 states, 20000 states have (on average 1.28585) internal successors, (25717), 20056 states have internal predecessors, (25717), 2285 states have call successors, (2285), 1576 states have call predecessors, (2285), 1576 states have return successors, (2285), 2230 states have call predecessors, (2285), 2285 states have call successors, (2285) [2023-12-02 08:19:04,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23862 states to 23862 states and 30287 transitions. [2023-12-02 08:19:04,547 INFO L78 Accepts]: Start accepts. Automaton has 23862 states and 30287 transitions. Word has length 135 [2023-12-02 08:19:04,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:04,547 INFO L495 AbstractCegarLoop]: Abstraction has 23862 states and 30287 transitions. [2023-12-02 08:19:04,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 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 08:19:04,547 INFO L276 IsEmpty]: Start isEmpty. Operand 23862 states and 30287 transitions. [2023-12-02 08:19:04,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-12-02 08:19:04,576 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:04,577 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 08:19:04,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 08:19:04,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 08:19:04,777 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:19:04,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:04,778 INFO L85 PathProgramCache]: Analyzing trace with hash 409171121, now seen corresponding path program 1 times [2023-12-02 08:19:04,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:04,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601980963] [2023-12-02 08:19:04,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:04,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:04,927 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 38 proven. 17 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-02 08:19:04,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:04,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601980963] [2023-12-02 08:19:04,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601980963] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:19:04,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284899357] [2023-12-02 08:19:04,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:04,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:04,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:19:04,929 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:19:04,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 08:19:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:05,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 08:19:05,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:19:05,136 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 08:19:05,137 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:19:05,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284899357] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:19:05,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:19:05,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2023-12-02 08:19:05,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666951546] [2023-12-02 08:19:05,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:19:05,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:19:05,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:19:05,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:19:05,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:19:05,139 INFO L87 Difference]: Start difference. First operand 23862 states and 30287 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 08:19:06,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:06,359 INFO L93 Difference]: Finished difference Result 44048 states and 56256 transitions. [2023-12-02 08:19:06,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:19:06,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 139 [2023-12-02 08:19:06,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:06,474 INFO L225 Difference]: With dead ends: 44048 [2023-12-02 08:19:06,474 INFO L226 Difference]: Without dead ends: 27420 [2023-12-02 08:19:06,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 141 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 08:19:06,493 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 88 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:06,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 177 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 08:19:06,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27420 states. [2023-12-02 08:19:07,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27420 to 27152. [2023-12-02 08:19:07,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27152 states, 23051 states have (on average 1.267146761528784) internal successors, (29209), 23107 states have internal predecessors, (29209), 2323 states have call successors, (2323), 1777 states have call predecessors, (2323), 1777 states have return successors, (2495), 2268 states have call predecessors, (2495), 2323 states have call successors, (2495) [2023-12-02 08:19:07,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27152 states to 27152 states and 34027 transitions. [2023-12-02 08:19:07,933 INFO L78 Accepts]: Start accepts. Automaton has 27152 states and 34027 transitions. Word has length 139 [2023-12-02 08:19:07,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:07,934 INFO L495 AbstractCegarLoop]: Abstraction has 27152 states and 34027 transitions. [2023-12-02 08:19:07,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 08:19:07,934 INFO L276 IsEmpty]: Start isEmpty. Operand 27152 states and 34027 transitions. [2023-12-02 08:19:07,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-12-02 08:19:07,957 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:07,957 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 08:19:07,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 08:19:08,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:08,158 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:19:08,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:08,158 INFO L85 PathProgramCache]: Analyzing trace with hash 754753388, now seen corresponding path program 1 times [2023-12-02 08:19:08,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:08,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536171324] [2023-12-02 08:19:08,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:08,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:08,332 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 34 proven. 11 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-12-02 08:19:08,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:08,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536171324] [2023-12-02 08:19:08,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536171324] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:19:08,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921584022] [2023-12-02 08:19:08,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:08,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:08,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:19:08,334 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:19:08,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 08:19:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:08,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 08:19:08,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:19:08,501 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 08:19:08,501 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:19:08,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921584022] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:19:08,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:19:08,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2023-12-02 08:19:08,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224793073] [2023-12-02 08:19:08,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:19:08,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 08:19:08,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:19:08,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 08:19:08,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 08:19:08,503 INFO L87 Difference]: Start difference. First operand 27152 states and 34027 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 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 08:19:10,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:10,015 INFO L93 Difference]: Finished difference Result 51953 states and 65395 transitions. [2023-12-02 08:19:10,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 08:19:10,016 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 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 138 [2023-12-02 08:19:10,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:10,065 INFO L225 Difference]: With dead ends: 51953 [2023-12-02 08:19:10,066 INFO L226 Difference]: Without dead ends: 33871 [2023-12-02 08:19:10,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 08:19:10,082 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 114 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:10,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 454 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:19:10,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33871 states. [2023-12-02 08:19:11,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33871 to 32639. [2023-12-02 08:19:11,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32639 states, 27504 states have (on average 1.260107620709715) internal successors, (34658), 27575 states have internal predecessors, (34658), 2891 states have call successors, (2891), 2213 states have call predecessors, (2891), 2243 states have return successors, (3499), 2851 states have call predecessors, (3499), 2891 states have call successors, (3499) [2023-12-02 08:19:11,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32639 states to 32639 states and 41048 transitions. [2023-12-02 08:19:11,669 INFO L78 Accepts]: Start accepts. Automaton has 32639 states and 41048 transitions. Word has length 138 [2023-12-02 08:19:11,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:11,670 INFO L495 AbstractCegarLoop]: Abstraction has 32639 states and 41048 transitions. [2023-12-02 08:19:11,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 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 08:19:11,670 INFO L276 IsEmpty]: Start isEmpty. Operand 32639 states and 41048 transitions. [2023-12-02 08:19:11,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-12-02 08:19:11,697 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:11,697 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 08:19:11,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 08:19:11,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:11,898 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:19:11,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:11,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1459672075, now seen corresponding path program 2 times [2023-12-02 08:19:11,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:11,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697228816] [2023-12-02 08:19:11,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:11,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:11,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:11,955 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 41 proven. 11 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 08:19:11,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:11,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697228816] [2023-12-02 08:19:11,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697228816] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:19:11,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037058561] [2023-12-02 08:19:11,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 08:19:11,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:11,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:19:11,957 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:19:11,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 08:19:12,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 08:19:12,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:19:12,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 08:19:12,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:19:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 08:19:12,113 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:19:12,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037058561] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:19:12,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:19:12,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-12-02 08:19:12,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290670530] [2023-12-02 08:19:12,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:19:12,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:19:12,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:19:12,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:19:12,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 08:19:12,115 INFO L87 Difference]: Start difference. First operand 32639 states and 41048 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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 08:19:14,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:14,919 INFO L93 Difference]: Finished difference Result 78583 states and 100966 transitions. [2023-12-02 08:19:14,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:19:14,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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 138 [2023-12-02 08:19:14,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:15,023 INFO L225 Difference]: With dead ends: 78583 [2023-12-02 08:19:15,024 INFO L226 Difference]: Without dead ends: 55014 [2023-12-02 08:19:15,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 139 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 08:19:15,066 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 104 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:15,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 252 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:19:15,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55014 states. [2023-12-02 08:19:17,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55014 to 54480. [2023-12-02 08:19:17,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54480 states, 45719 states have (on average 1.2432686629191365) internal successors, (56841), 45865 states have internal predecessors, (56841), 4925 states have call successors, (4925), 3797 states have call predecessors, (4925), 3835 states have return successors, (6685), 4818 states have call predecessors, (6685), 4925 states have call successors, (6685) [2023-12-02 08:19:18,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54480 states to 54480 states and 68451 transitions. [2023-12-02 08:19:18,121 INFO L78 Accepts]: Start accepts. Automaton has 54480 states and 68451 transitions. Word has length 138 [2023-12-02 08:19:18,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:18,122 INFO L495 AbstractCegarLoop]: Abstraction has 54480 states and 68451 transitions. [2023-12-02 08:19:18,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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 08:19:18,122 INFO L276 IsEmpty]: Start isEmpty. Operand 54480 states and 68451 transitions. [2023-12-02 08:19:18,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-12-02 08:19:18,189 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:18,189 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 08:19:18,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-02 08:19:18,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:18,390 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:19:18,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:18,390 INFO L85 PathProgramCache]: Analyzing trace with hash 93467270, now seen corresponding path program 1 times [2023-12-02 08:19:18,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:18,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442373767] [2023-12-02 08:19:18,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:18,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:18,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:18,467 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 43 proven. 11 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 08:19:18,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:18,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442373767] [2023-12-02 08:19:18,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442373767] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:19:18,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548353097] [2023-12-02 08:19:18,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:18,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:18,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:19:18,469 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:19:18,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 08:19:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:18,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 08:19:18,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:19:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 08:19:18,655 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:19:18,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548353097] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:19:18,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:19:18,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-12-02 08:19:18,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797963558] [2023-12-02 08:19:18,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:19:18,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:19:18,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:19:18,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:19:18,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 08:19:18,658 INFO L87 Difference]: Start difference. First operand 54480 states and 68451 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 08:19:21,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:21,888 INFO L93 Difference]: Finished difference Result 105256 states and 132310 transitions. [2023-12-02 08:19:21,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:19:21,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 139 [2023-12-02 08:19:21,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:21,998 INFO L225 Difference]: With dead ends: 105256 [2023-12-02 08:19:21,998 INFO L226 Difference]: Without dead ends: 59462 [2023-12-02 08:19:22,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 140 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 08:19:22,046 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 94 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:22,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 178 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 08:19:22,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59462 states. [2023-12-02 08:19:25,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59462 to 57742. [2023-12-02 08:19:25,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57742 states, 48889 states have (on average 1.2310131113338378) internal successors, (60183), 49053 states have internal predecessors, (60183), 4861 states have call successors, (4861), 3955 states have call predecessors, (4861), 3991 states have return successors, (6285), 4734 states have call predecessors, (6285), 4861 states have call successors, (6285) [2023-12-02 08:19:25,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57742 states to 57742 states and 71329 transitions. [2023-12-02 08:19:25,457 INFO L78 Accepts]: Start accepts. Automaton has 57742 states and 71329 transitions. Word has length 139 [2023-12-02 08:19:25,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:25,458 INFO L495 AbstractCegarLoop]: Abstraction has 57742 states and 71329 transitions. [2023-12-02 08:19:25,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 08:19:25,458 INFO L276 IsEmpty]: Start isEmpty. Operand 57742 states and 71329 transitions. [2023-12-02 08:19:25,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-12-02 08:19:25,516 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:25,516 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 08:19:25,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-02 08:19:25,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:25,717 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:19:25,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:25,717 INFO L85 PathProgramCache]: Analyzing trace with hash -214971739, now seen corresponding path program 1 times [2023-12-02 08:19:25,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:25,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717147629] [2023-12-02 08:19:25,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:25,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:25,778 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-12-02 08:19:25,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:25,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717147629] [2023-12-02 08:19:25,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717147629] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:19:25,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:19:25,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 08:19:25,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068630367] [2023-12-02 08:19:25,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:19:25,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 08:19:25,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:19:25,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 08:19:25,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 08:19:25,781 INFO L87 Difference]: Start difference. First operand 57742 states and 71329 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 08:19:28,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:28,024 INFO L93 Difference]: Finished difference Result 82967 states and 103739 transitions. [2023-12-02 08:19:28,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 08:19:28,025 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 139 [2023-12-02 08:19:28,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:28,079 INFO L225 Difference]: With dead ends: 82967 [2023-12-02 08:19:28,079 INFO L226 Difference]: Without dead ends: 34655 [2023-12-02 08:19:28,127 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 08:19:28,128 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 227 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:28,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 378 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:19:28,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34655 states. [2023-12-02 08:19:30,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34655 to 34323. [2023-12-02 08:19:30,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34323 states, 29134 states have (on average 1.217237591817121) internal successors, (35463), 29235 states have internal predecessors, (35463), 2857 states have call successors, (2857), 2311 states have call predecessors, (2857), 2331 states have return successors, (3299), 2777 states have call predecessors, (3299), 2857 states have call successors, (3299) [2023-12-02 08:19:30,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34323 states to 34323 states and 41619 transitions. [2023-12-02 08:19:30,191 INFO L78 Accepts]: Start accepts. Automaton has 34323 states and 41619 transitions. Word has length 139 [2023-12-02 08:19:30,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:30,191 INFO L495 AbstractCegarLoop]: Abstraction has 34323 states and 41619 transitions. [2023-12-02 08:19:30,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 08:19:30,191 INFO L276 IsEmpty]: Start isEmpty. Operand 34323 states and 41619 transitions. [2023-12-02 08:19:30,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-12-02 08:19:30,224 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:30,224 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:19:30,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-12-02 08:19:30,225 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:19:30,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:30,225 INFO L85 PathProgramCache]: Analyzing trace with hash -743780762, now seen corresponding path program 1 times [2023-12-02 08:19:30,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:30,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649464640] [2023-12-02 08:19:30,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:30,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:30,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:30,912 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 13 proven. 52 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 08:19:30,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:30,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649464640] [2023-12-02 08:19:30,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649464640] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:19:30,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793459298] [2023-12-02 08:19:30,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:30,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:30,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:19:30,914 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:19:30,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 08:19:31,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:31,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 08:19:31,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:19:31,216 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 08:19:31,217 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:19:31,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793459298] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:19:31,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:19:31,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 17 [2023-12-02 08:19:31,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342289086] [2023-12-02 08:19:31,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:19:31,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 08:19:31,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:19:31,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 08:19:31,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-12-02 08:19:31,219 INFO L87 Difference]: Start difference. First operand 34323 states and 41619 transitions. Second operand has 7 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 08:19:33,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:33,755 INFO L93 Difference]: Finished difference Result 58438 states and 71825 transitions. [2023-12-02 08:19:33,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 08:19:33,756 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 135 [2023-12-02 08:19:33,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:33,815 INFO L225 Difference]: With dead ends: 58438 [2023-12-02 08:19:33,815 INFO L226 Difference]: Without dead ends: 40983 [2023-12-02 08:19:33,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2023-12-02 08:19:33,835 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 231 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:33,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 936 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 08:19:33,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40983 states. [2023-12-02 08:19:35,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40983 to 35712. [2023-12-02 08:19:35,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35712 states, 30399 states have (on average 1.2203690910885225) internal successors, (37098), 30499 states have internal predecessors, (37098), 2918 states have call successors, (2918), 2374 states have call predecessors, (2918), 2394 states have return successors, (3360), 2839 states have call predecessors, (3360), 2918 states have call successors, (3360) [2023-12-02 08:19:35,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35712 states to 35712 states and 43376 transitions. [2023-12-02 08:19:35,835 INFO L78 Accepts]: Start accepts. Automaton has 35712 states and 43376 transitions. Word has length 135 [2023-12-02 08:19:35,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:35,835 INFO L495 AbstractCegarLoop]: Abstraction has 35712 states and 43376 transitions. [2023-12-02 08:19:35,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 08:19:35,835 INFO L276 IsEmpty]: Start isEmpty. Operand 35712 states and 43376 transitions. [2023-12-02 08:19:35,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-12-02 08:19:35,856 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:35,856 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 08:19:35,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-02 08:19:36,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-02 08:19:36,056 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:19:36,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:36,057 INFO L85 PathProgramCache]: Analyzing trace with hash -568088842, now seen corresponding path program 2 times [2023-12-02 08:19:36,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:36,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011425269] [2023-12-02 08:19:36,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:36,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:36,401 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 45 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 08:19:36,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:36,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011425269] [2023-12-02 08:19:36,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011425269] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:19:36,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388594314] [2023-12-02 08:19:36,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 08:19:36,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:36,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:19:36,403 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:19:36,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 08:19:36,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-02 08:19:36,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:19:36,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-02 08:19:36,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:19:36,667 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 08:19:36,667 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:19:36,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388594314] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:19:36,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:19:36,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2023-12-02 08:19:36,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083893556] [2023-12-02 08:19:36,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:19:36,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 08:19:36,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:19:36,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 08:19:36,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-12-02 08:19:36,669 INFO L87 Difference]: Start difference. First operand 35712 states and 43376 transitions. Second operand has 7 states, 6 states have (on average 19.666666666666668) internal successors, (118), 7 states have internal predecessors, (118), 6 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2023-12-02 08:19:39,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:39,490 INFO L93 Difference]: Finished difference Result 70665 states and 86155 transitions. [2023-12-02 08:19:39,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 08:19:39,490 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 19.666666666666668) internal successors, (118), 7 states have internal predecessors, (118), 6 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) Word has length 140 [2023-12-02 08:19:39,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:39,559 INFO L225 Difference]: With dead ends: 70665 [2023-12-02 08:19:39,559 INFO L226 Difference]: Without dead ends: 46249 [2023-12-02 08:19:39,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-12-02 08:19:39,584 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 228 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:39,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 457 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 08:19:39,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46249 states. [2023-12-02 08:19:42,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46249 to 43957. [2023-12-02 08:19:42,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43957 states, 37276 states have (on average 1.211637514754802) internal successors, (45165), 37379 states have internal predecessors, (45165), 3698 states have call successors, (3698), 2992 states have call predecessors, (3698), 2982 states have return successors, (4424), 3586 states have call predecessors, (4424), 3698 states have call successors, (4424) [2023-12-02 08:19:42,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43957 states to 43957 states and 53287 transitions. [2023-12-02 08:19:42,442 INFO L78 Accepts]: Start accepts. Automaton has 43957 states and 53287 transitions. Word has length 140 [2023-12-02 08:19:42,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:42,442 INFO L495 AbstractCegarLoop]: Abstraction has 43957 states and 53287 transitions. [2023-12-02 08:19:42,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 19.666666666666668) internal successors, (118), 7 states have internal predecessors, (118), 6 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2023-12-02 08:19:42,443 INFO L276 IsEmpty]: Start isEmpty. Operand 43957 states and 53287 transitions. [2023-12-02 08:19:42,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-12-02 08:19:42,466 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:42,466 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:42,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-02 08:19:42,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-02 08:19:42,667 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:19:42,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:42,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1384567997, now seen corresponding path program 1 times [2023-12-02 08:19:42,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:42,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105608176] [2023-12-02 08:19:42,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:42,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:42,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 17 proven. 32 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 08:19:42,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:42,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105608176] [2023-12-02 08:19:42,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105608176] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:19:42,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485172599] [2023-12-02 08:19:42,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:42,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:42,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:19:42,818 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:19:42,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 08:19:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:42,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 08:19:42,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:19:43,051 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 08:19:43,051 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:19:43,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485172599] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:19:43,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:19:43,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2023-12-02 08:19:43,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606621107] [2023-12-02 08:19:43,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:19:43,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 08:19:43,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:19:43,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 08:19:43,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-12-02 08:19:43,053 INFO L87 Difference]: Start difference. First operand 43957 states and 53287 transitions. Second operand has 8 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 08:19:45,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:45,924 INFO L93 Difference]: Finished difference Result 62817 states and 76840 transitions. [2023-12-02 08:19:45,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 08:19:45,925 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 138 [2023-12-02 08:19:45,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:46,016 INFO L225 Difference]: With dead ends: 62817 [2023-12-02 08:19:46,016 INFO L226 Difference]: Without dead ends: 46977 [2023-12-02 08:19:46,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-12-02 08:19:46,038 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 241 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:46,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 1184 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 08:19:46,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46977 states. [2023-12-02 08:19:48,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46977 to 44746. [2023-12-02 08:19:48,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44746 states, 37993 states have (on average 1.2120653804648225) internal successors, (46050), 38096 states have internal predecessors, (46050), 3734 states have call successors, (3734), 3028 states have call predecessors, (3734), 3018 states have return successors, (4460), 3622 states have call predecessors, (4460), 3734 states have call successors, (4460) [2023-12-02 08:19:48,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44746 states to 44746 states and 54244 transitions. [2023-12-02 08:19:48,749 INFO L78 Accepts]: Start accepts. Automaton has 44746 states and 54244 transitions. Word has length 138 [2023-12-02 08:19:48,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:48,749 INFO L495 AbstractCegarLoop]: Abstraction has 44746 states and 54244 transitions. [2023-12-02 08:19:48,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 08:19:48,749 INFO L276 IsEmpty]: Start isEmpty. Operand 44746 states and 54244 transitions. [2023-12-02 08:19:48,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-12-02 08:19:48,772 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:48,772 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2023-12-02 08:19:48,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-02 08:19:48,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-02 08:19:48,973 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:19:48,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:48,973 INFO L85 PathProgramCache]: Analyzing trace with hash 659757893, now seen corresponding path program 1 times [2023-12-02 08:19:48,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:48,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19313234] [2023-12-02 08:19:48,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:48,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:48,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:49,033 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-02 08:19:49,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:49,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19313234] [2023-12-02 08:19:49,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19313234] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:19:49,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357541755] [2023-12-02 08:19:49,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:49,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:49,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:19:49,034 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:19:49,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-02 08:19:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:49,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 08:19:49,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:19:49,194 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 08:19:49,195 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:19:49,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357541755] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:19:49,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:19:49,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 08:19:49,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609822111] [2023-12-02 08:19:49,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:19:49,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:19:49,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:19:49,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:19:49,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:19:49,196 INFO L87 Difference]: Start difference. First operand 44746 states and 54244 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 08:19:52,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:52,275 INFO L93 Difference]: Finished difference Result 83856 states and 102734 transitions. [2023-12-02 08:19:52,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:19:52,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 134 [2023-12-02 08:19:52,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:52,502 INFO L225 Difference]: With dead ends: 83856 [2023-12-02 08:19:52,502 INFO L226 Difference]: Without dead ends: 53476 [2023-12-02 08:19:52,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 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 08:19:52,526 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 69 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:52,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 320 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:19:52,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53476 states. [2023-12-02 08:19:55,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53476 to 48822. [2023-12-02 08:19:55,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48822 states, 41613 states have (on average 1.218465383413837) internal successors, (50704), 41716 states have internal predecessors, (50704), 3962 states have call successors, (3962), 3256 states have call predecessors, (3962), 3246 states have return successors, (4688), 3850 states have call predecessors, (4688), 3962 states have call successors, (4688) [2023-12-02 08:19:55,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48822 states to 48822 states and 59354 transitions. [2023-12-02 08:19:55,593 INFO L78 Accepts]: Start accepts. Automaton has 48822 states and 59354 transitions. Word has length 134 [2023-12-02 08:19:55,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:19:55,594 INFO L495 AbstractCegarLoop]: Abstraction has 48822 states and 59354 transitions. [2023-12-02 08:19:55,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 08:19:55,594 INFO L276 IsEmpty]: Start isEmpty. Operand 48822 states and 59354 transitions. [2023-12-02 08:19:55,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-12-02 08:19:55,616 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:19:55,616 INFO L195 NwaCegarLoop]: trace histogram [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 08:19:55,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-02 08:19:55,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-02 08:19:55,817 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:19:55,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:19:55,817 INFO L85 PathProgramCache]: Analyzing trace with hash -113686566, now seen corresponding path program 1 times [2023-12-02 08:19:55,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:19:55,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528909673] [2023-12-02 08:19:55,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:55,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:19:55,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:55,960 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-12-02 08:19:55,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:19:55,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528909673] [2023-12-02 08:19:55,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528909673] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:19:55,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918529096] [2023-12-02 08:19:55,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:19:55,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:19:55,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:19:55,962 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:19:55,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-02 08:19:56,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:19:56,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 08:19:56,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:19:56,113 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 08:19:56,113 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:19:56,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918529096] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:19:56,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:19:56,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 08:19:56,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755854130] [2023-12-02 08:19:56,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:19:56,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:19:56,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:19:56,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:19:56,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:19:56,115 INFO L87 Difference]: Start difference. First operand 48822 states and 59354 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 08:19:59,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:19:59,473 INFO L93 Difference]: Finished difference Result 92255 states and 112936 transitions. [2023-12-02 08:19:59,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:19:59,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 135 [2023-12-02 08:19:59,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:19:59,566 INFO L225 Difference]: With dead ends: 92255 [2023-12-02 08:19:59,566 INFO L226 Difference]: Without dead ends: 58013 [2023-12-02 08:19:59,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 135 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 08:19:59,599 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 62 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:19:59,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 316 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:19:59,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58013 states. [2023-12-02 08:20:02,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58013 to 53918. [2023-12-02 08:20:02,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53918 states, 46133 states have (on average 1.2278845945418682) internal successors, (56646), 46236 states have internal predecessors, (56646), 4250 states have call successors, (4250), 3544 states have call predecessors, (4250), 3534 states have return successors, (4976), 4138 states have call predecessors, (4976), 4250 states have call successors, (4976) [2023-12-02 08:20:02,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53918 states to 53918 states and 65872 transitions. [2023-12-02 08:20:02,998 INFO L78 Accepts]: Start accepts. Automaton has 53918 states and 65872 transitions. Word has length 135 [2023-12-02 08:20:02,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:20:02,998 INFO L495 AbstractCegarLoop]: Abstraction has 53918 states and 65872 transitions. [2023-12-02 08:20:02,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 08:20:02,998 INFO L276 IsEmpty]: Start isEmpty. Operand 53918 states and 65872 transitions. [2023-12-02 08:20:03,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-12-02 08:20:03,036 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:20:03,037 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 08:20:03,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-12-02 08:20:03,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-02 08:20:03,237 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:20:03,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:20:03,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1103688157, now seen corresponding path program 1 times [2023-12-02 08:20:03,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:20:03,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389233855] [2023-12-02 08:20:03,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:03,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:20:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:03,553 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 33 proven. 7 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 08:20:03,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:20:03,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389233855] [2023-12-02 08:20:03,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389233855] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:20:03,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855593668] [2023-12-02 08:20:03,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:03,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:03,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:20:03,554 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:20:03,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-02 08:20:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:03,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 08:20:03,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:20:03,861 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 08:20:03,862 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:20:03,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855593668] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:20:03,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:20:03,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 15 [2023-12-02 08:20:03,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92347371] [2023-12-02 08:20:03,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:20:03,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 08:20:03,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:20:03,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 08:20:03,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-12-02 08:20:03,864 INFO L87 Difference]: Start difference. First operand 53918 states and 65872 transitions. Second operand has 6 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 08:20:07,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:20:07,455 INFO L93 Difference]: Finished difference Result 94510 states and 116915 transitions. [2023-12-02 08:20:07,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 08:20:07,456 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 136 [2023-12-02 08:20:07,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:20:07,539 INFO L225 Difference]: With dead ends: 94510 [2023-12-02 08:20:07,539 INFO L226 Difference]: Without dead ends: 56298 [2023-12-02 08:20:07,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2023-12-02 08:20:07,568 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 179 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:20:07,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 193 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 08:20:07,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56298 states. [2023-12-02 08:20:11,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56298 to 55498. [2023-12-02 08:20:11,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55498 states, 47583 states have (on average 1.2098858836138957) internal successors, (57570), 47686 states have internal predecessors, (57570), 4268 states have call successors, (4268), 3634 states have call predecessors, (4268), 3646 states have return successors, (4990), 4178 states have call predecessors, (4990), 4268 states have call successors, (4990) [2023-12-02 08:20:11,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55498 states to 55498 states and 66828 transitions. [2023-12-02 08:20:11,252 INFO L78 Accepts]: Start accepts. Automaton has 55498 states and 66828 transitions. Word has length 136 [2023-12-02 08:20:11,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:20:11,253 INFO L495 AbstractCegarLoop]: Abstraction has 55498 states and 66828 transitions. [2023-12-02 08:20:11,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 08:20:11,253 INFO L276 IsEmpty]: Start isEmpty. Operand 55498 states and 66828 transitions. [2023-12-02 08:20:11,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-12-02 08:20:11,286 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:20:11,286 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, 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] [2023-12-02 08:20:11,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-12-02 08:20:11,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-02 08:20:11,487 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:20:11,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:20:11,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1747673627, now seen corresponding path program 1 times [2023-12-02 08:20:11,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:20:11,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417764873] [2023-12-02 08:20:11,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:11,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:20:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:11,533 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-12-02 08:20:11,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:20:11,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417764873] [2023-12-02 08:20:11,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417764873] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:20:11,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358140750] [2023-12-02 08:20:11,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:11,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:11,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:20:11,535 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:20:11,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-02 08:20:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:11,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 08:20:11,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:20:11,681 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 08:20:11,681 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:20:11,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358140750] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:20:11,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:20:11,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-12-02 08:20:11,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826267167] [2023-12-02 08:20:11,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:20:11,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 08:20:11,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:20:11,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 08:20:11,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 08:20:11,683 INFO L87 Difference]: Start difference. First operand 55498 states and 66828 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 08:20:15,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:20:15,041 INFO L93 Difference]: Finished difference Result 94853 states and 116085 transitions. [2023-12-02 08:20:15,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 08:20:15,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 136 [2023-12-02 08:20:15,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:20:15,128 INFO L225 Difference]: With dead ends: 94853 [2023-12-02 08:20:15,129 INFO L226 Difference]: Without dead ends: 55569 [2023-12-02 08:20:15,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 137 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 08:20:15,165 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 105 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:20:15,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 331 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:20:15,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55569 states. [2023-12-02 08:20:18,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55569 to 55040. [2023-12-02 08:20:18,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55040 states, 47125 states have (on average 1.184212201591512) internal successors, (55806), 47228 states have internal predecessors, (55806), 4268 states have call successors, (4268), 3634 states have call predecessors, (4268), 3646 states have return successors, (4990), 4178 states have call predecessors, (4990), 4268 states have call successors, (4990) [2023-12-02 08:20:18,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55040 states to 55040 states and 65064 transitions. [2023-12-02 08:20:18,793 INFO L78 Accepts]: Start accepts. Automaton has 55040 states and 65064 transitions. Word has length 136 [2023-12-02 08:20:18,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:20:18,793 INFO L495 AbstractCegarLoop]: Abstraction has 55040 states and 65064 transitions. [2023-12-02 08:20:18,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 08:20:18,794 INFO L276 IsEmpty]: Start isEmpty. Operand 55040 states and 65064 transitions. [2023-12-02 08:20:18,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-12-02 08:20:18,817 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:20:18,817 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:20:18,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-12-02 08:20:19,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:19,017 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:20:19,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:20:19,018 INFO L85 PathProgramCache]: Analyzing trace with hash 416273509, now seen corresponding path program 1 times [2023-12-02 08:20:19,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:20:19,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925283537] [2023-12-02 08:20:19,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:19,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:20:19,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:19,188 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 08:20:19,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:20:19,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925283537] [2023-12-02 08:20:19,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925283537] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:20:19,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567279600] [2023-12-02 08:20:19,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:19,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:19,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:20:19,189 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:20:19,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-02 08:20:19,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:19,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 08:20:19,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:20:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 08:20:19,495 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:20:19,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567279600] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:20:19,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:20:19,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2023-12-02 08:20:19,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164797006] [2023-12-02 08:20:19,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:20:19,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 08:20:19,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:20:19,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 08:20:19,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-12-02 08:20:19,496 INFO L87 Difference]: Start difference. First operand 55040 states and 65064 transitions. Second operand has 9 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 08:20:23,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:20:23,171 INFO L93 Difference]: Finished difference Result 71121 states and 84683 transitions. [2023-12-02 08:20:23,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 08:20:23,171 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 140 [2023-12-02 08:20:23,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:20:23,264 INFO L225 Difference]: With dead ends: 71121 [2023-12-02 08:20:23,264 INFO L226 Difference]: Without dead ends: 57432 [2023-12-02 08:20:23,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2023-12-02 08:20:23,283 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 244 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:20:23,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 1186 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 08:20:23,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57432 states. [2023-12-02 08:20:26,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57432 to 55260. [2023-12-02 08:20:26,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55260 states, 47321 states have (on average 1.1842944992709368) internal successors, (56042), 47424 states have internal predecessors, (56042), 4280 states have call successors, (4280), 3646 states have call predecessors, (4280), 3658 states have return successors, (5002), 4190 states have call predecessors, (5002), 4280 states have call successors, (5002) [2023-12-02 08:20:26,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55260 states to 55260 states and 65324 transitions. [2023-12-02 08:20:26,820 INFO L78 Accepts]: Start accepts. Automaton has 55260 states and 65324 transitions. Word has length 140 [2023-12-02 08:20:26,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:20:26,820 INFO L495 AbstractCegarLoop]: Abstraction has 55260 states and 65324 transitions. [2023-12-02 08:20:26,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 08:20:26,820 INFO L276 IsEmpty]: Start isEmpty. Operand 55260 states and 65324 transitions. [2023-12-02 08:20:26,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 08:20:26,846 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:20:26,846 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 08:20:26,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-12-02 08:20:27,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-12-02 08:20:27,047 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:20:27,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:20:27,047 INFO L85 PathProgramCache]: Analyzing trace with hash -341759447, now seen corresponding path program 1 times [2023-12-02 08:20:27,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:20:27,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693617350] [2023-12-02 08:20:27,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:27,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:20:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:27,158 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 54 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 08:20:27,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:20:27,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693617350] [2023-12-02 08:20:27,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693617350] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:20:27,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509067248] [2023-12-02 08:20:27,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:27,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:27,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:20:27,159 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:20:27,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-02 08:20:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:27,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 08:20:27,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:20:27,348 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 08:20:27,348 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:20:27,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509067248] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:20:27,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:20:27,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2023-12-02 08:20:27,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109516842] [2023-12-02 08:20:27,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:20:27,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 08:20:27,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:20:27,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 08:20:27,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 08:20:27,350 INFO L87 Difference]: Start difference. First operand 55260 states and 65324 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-02 08:20:31,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:20:31,774 INFO L93 Difference]: Finished difference Result 100087 states and 119125 transitions. [2023-12-02 08:20:31,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 08:20:31,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 137 [2023-12-02 08:20:31,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:20:31,895 INFO L225 Difference]: With dead ends: 100087 [2023-12-02 08:20:31,895 INFO L226 Difference]: Without dead ends: 70483 [2023-12-02 08:20:31,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 08:20:31,945 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 187 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:20:31,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 323 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:20:31,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70483 states. [2023-12-02 08:20:36,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70483 to 65964. [2023-12-02 08:20:36,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65964 states, 56864 states have (on average 1.1737830613393359) internal successors, (66746), 57112 states have internal predecessors, (66746), 4747 states have call successors, (4747), 4168 states have call predecessors, (4747), 4352 states have return successors, (5622), 4684 states have call predecessors, (5622), 4747 states have call successors, (5622) [2023-12-02 08:20:36,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65964 states to 65964 states and 77115 transitions. [2023-12-02 08:20:36,414 INFO L78 Accepts]: Start accepts. Automaton has 65964 states and 77115 transitions. Word has length 137 [2023-12-02 08:20:36,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:20:36,414 INFO L495 AbstractCegarLoop]: Abstraction has 65964 states and 77115 transitions. [2023-12-02 08:20:36,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-02 08:20:36,415 INFO L276 IsEmpty]: Start isEmpty. Operand 65964 states and 77115 transitions. [2023-12-02 08:20:36,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-12-02 08:20:36,443 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:20:36,443 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 08:20:36,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-12-02 08:20:36,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:36,644 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:20:36,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:20:36,644 INFO L85 PathProgramCache]: Analyzing trace with hash 743503273, now seen corresponding path program 1 times [2023-12-02 08:20:36,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:20:36,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058342006] [2023-12-02 08:20:36,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:36,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:20:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:36,766 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 08:20:36,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:20:36,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058342006] [2023-12-02 08:20:36,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058342006] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:20:36,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:20:36,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 08:20:36,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311278866] [2023-12-02 08:20:36,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:20:36,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 08:20:36,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:20:36,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 08:20:36,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 08:20:36,768 INFO L87 Difference]: Start difference. First operand 65964 states and 77115 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 08:20:42,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:20:42,679 INFO L93 Difference]: Finished difference Result 127275 states and 149096 transitions. [2023-12-02 08:20:42,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 08:20:42,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 138 [2023-12-02 08:20:42,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:20:42,827 INFO L225 Difference]: With dead ends: 127275 [2023-12-02 08:20:42,827 INFO L226 Difference]: Without dead ends: 87758 [2023-12-02 08:20:42,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-02 08:20:42,873 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 103 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:20:42,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 450 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 08:20:42,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87758 states. [2023-12-02 08:20:48,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87758 to 83368. [2023-12-02 08:20:48,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83368 states, 71254 states have (on average 1.1564684087910855) internal successors, (82403), 71752 states have internal predecessors, (82403), 6320 states have call successors, (6320), 5455 states have call predecessors, (6320), 5793 states have return successors, (8207), 6161 states have call predecessors, (8207), 6320 states have call successors, (8207) [2023-12-02 08:20:48,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83368 states to 83368 states and 96930 transitions. [2023-12-02 08:20:48,639 INFO L78 Accepts]: Start accepts. Automaton has 83368 states and 96930 transitions. Word has length 138 [2023-12-02 08:20:48,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:20:48,640 INFO L495 AbstractCegarLoop]: Abstraction has 83368 states and 96930 transitions. [2023-12-02 08:20:48,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 08:20:48,640 INFO L276 IsEmpty]: Start isEmpty. Operand 83368 states and 96930 transitions. [2023-12-02 08:20:48,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-12-02 08:20:48,668 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:20:48,668 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 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 08:20:48,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-12-02 08:20:48,668 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:20:48,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:20:48,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1162948048, now seen corresponding path program 1 times [2023-12-02 08:20:48,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:20:48,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167891462] [2023-12-02 08:20:48,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:48,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:20:48,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 08:20:48,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:20:48,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167891462] [2023-12-02 08:20:48,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167891462] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:20:48,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863013356] [2023-12-02 08:20:48,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:20:48,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:20:48,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:20:48,846 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:20:48,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-02 08:20:48,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:20:48,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 08:20:48,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:20:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 08:20:49,132 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:20:49,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863013356] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:20:49,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:20:49,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 16 [2023-12-02 08:20:49,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486187136] [2023-12-02 08:20:49,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:20:49,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 08:20:49,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:20:49,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 08:20:49,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-12-02 08:20:49,134 INFO L87 Difference]: Start difference. First operand 83368 states and 96930 transitions. Second operand has 10 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 08:20:55,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:20:55,089 INFO L93 Difference]: Finished difference Result 104034 states and 121274 transitions. [2023-12-02 08:20:55,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 08:20:55,090 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 143 [2023-12-02 08:20:55,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:20:55,220 INFO L225 Difference]: With dead ends: 104034 [2023-12-02 08:20:55,220 INFO L226 Difference]: Without dead ends: 85036 [2023-12-02 08:20:55,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2023-12-02 08:20:55,246 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 232 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 08:20:55,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 1435 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 08:20:55,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85036 states. [2023-12-02 08:21:00,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85036 to 83417. [2023-12-02 08:21:00,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83417 states, 71297 states have (on average 1.1564722218326158) internal successors, (82453), 71795 states have internal predecessors, (82453), 6323 states have call successors, (6323), 5458 states have call predecessors, (6323), 5796 states have return successors, (8210), 6164 states have call predecessors, (8210), 6323 states have call successors, (8210) [2023-12-02 08:21:01,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83417 states to 83417 states and 96986 transitions. [2023-12-02 08:21:01,031 INFO L78 Accepts]: Start accepts. Automaton has 83417 states and 96986 transitions. Word has length 143 [2023-12-02 08:21:01,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:21:01,031 INFO L495 AbstractCegarLoop]: Abstraction has 83417 states and 96986 transitions. [2023-12-02 08:21:01,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 08:21:01,031 INFO L276 IsEmpty]: Start isEmpty. Operand 83417 states and 96986 transitions. [2023-12-02 08:21:01,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-12-02 08:21:01,059 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:21:01,059 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:21:01,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-12-02 08:21:01,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-12-02 08:21:01,260 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:21:01,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:21:01,260 INFO L85 PathProgramCache]: Analyzing trace with hash 255997245, now seen corresponding path program 1 times [2023-12-02 08:21:01,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:21:01,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656267662] [2023-12-02 08:21:01,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:21:01,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:21:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:21:01,758 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 26 proven. 37 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 08:21:01,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:21:01,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656267662] [2023-12-02 08:21:01,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656267662] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:21:01,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862447993] [2023-12-02 08:21:01,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:21:01,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:21:01,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:21:01,760 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:21:01,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-02 08:21:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:21:01,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-02 08:21:01,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:21:02,226 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 62 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 08:21:02,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:21:02,920 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 33 proven. 7 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-12-02 08:21:02,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862447993] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:21:02,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [421771095] [2023-12-02 08:21:02,942 INFO L159 IcfgInterpreter]: Started Sifa with 89 locations of interest [2023-12-02 08:21:02,943 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:21:02,946 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:21:02,951 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:21:02,952 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:21:12,207 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 108 for LOIs [2023-12-02 08:21:12,259 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 118 for LOIs [2023-12-02 08:21:12,321 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 1 for LOIs [2023-12-02 08:21:12,321 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 1 for LOIs [2023-12-02 08:21:12,332 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 31 for LOIs [2023-12-02 08:21:12,544 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 1 for LOIs [2023-12-02 08:21:12,691 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:21:28,300 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3009960#(and (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (not (= ~token~0 (+ ~local~0 4))) (= |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) (= ~m_st~0 1) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|))' at error location [2023-12-02 08:21:28,300 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:21:28,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 08:21:28,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 12] total 36 [2023-12-02 08:21:28,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098665390] [2023-12-02 08:21:28,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 08:21:28,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-02 08:21:28,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:21:28,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-02 08:21:28,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=553, Invalid=10159, Unknown=0, NotChecked=0, Total=10712 [2023-12-02 08:21:28,305 INFO L87 Difference]: Start difference. First operand 83417 states and 96986 transitions. Second operand has 36 states, 24 states have (on average 10.291666666666666) internal successors, (247), 27 states have internal predecessors, (247), 14 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) [2023-12-02 08:21:49,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:21:49,740 INFO L93 Difference]: Finished difference Result 253339 states and 303417 transitions. [2023-12-02 08:21:49,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-12-02 08:21:49,741 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 24 states have (on average 10.291666666666666) internal successors, (247), 27 states have internal predecessors, (247), 14 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) Word has length 145 [2023-12-02 08:21:49,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:21:50,066 INFO L225 Difference]: With dead ends: 253339 [2023-12-02 08:21:50,066 INFO L226 Difference]: Without dead ends: 176944 [2023-12-02 08:21:50,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 374 SyntacticMatches, 2 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11994 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=2928, Invalid=31112, Unknown=0, NotChecked=0, Total=34040 [2023-12-02 08:21:50,173 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 5756 mSDsluCounter, 1624 mSDsCounter, 0 mSdLazyCounter, 4241 mSolverCounterSat, 1547 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5756 SdHoareTripleChecker+Valid, 1741 SdHoareTripleChecker+Invalid, 5788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1547 IncrementalHoareTripleChecker+Valid, 4241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-12-02 08:21:50,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5756 Valid, 1741 Invalid, 5788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1547 Valid, 4241 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-12-02 08:21:50,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176944 states. [2023-12-02 08:21:57,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176944 to 61161. [2023-12-02 08:21:57,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61161 states, 52295 states have (on average 1.1614303470695095) internal successors, (60737), 52459 states have internal predecessors, (60737), 4730 states have call successors, (4730), 4097 states have call predecessors, (4730), 4135 states have return successors, (5097), 4605 states have call predecessors, (5097), 4730 states have call successors, (5097) [2023-12-02 08:21:57,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61161 states to 61161 states and 70564 transitions. [2023-12-02 08:21:57,239 INFO L78 Accepts]: Start accepts. Automaton has 61161 states and 70564 transitions. Word has length 145 [2023-12-02 08:21:57,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:21:57,239 INFO L495 AbstractCegarLoop]: Abstraction has 61161 states and 70564 transitions. [2023-12-02 08:21:57,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 24 states have (on average 10.291666666666666) internal successors, (247), 27 states have internal predecessors, (247), 14 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) [2023-12-02 08:21:57,239 INFO L276 IsEmpty]: Start isEmpty. Operand 61161 states and 70564 transitions. [2023-12-02 08:21:57,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-12-02 08:21:57,275 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:21:57,275 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:21:57,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-12-02 08:21:57,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-12-02 08:21:57,476 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:21:57,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:21:57,476 INFO L85 PathProgramCache]: Analyzing trace with hash 555922543, now seen corresponding path program 1 times [2023-12-02 08:21:57,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:21:57,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380120084] [2023-12-02 08:21:57,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:21:57,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:21:57,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:21:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 53 proven. 42 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-12-02 08:21:57,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:21:57,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380120084] [2023-12-02 08:21:57,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380120084] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:21:57,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671499769] [2023-12-02 08:21:57,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:21:57,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:21:57,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:21:57,620 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:21:57,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-02 08:21:57,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:21:57,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 08:21:57,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:21:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 08:21:57,795 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:21:57,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671499769] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:21:57,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:21:57,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2023-12-02 08:21:57,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304851602] [2023-12-02 08:21:57,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:21:57,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 08:21:57,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:21:57,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 08:21:57,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:21:57,797 INFO L87 Difference]: Start difference. First operand 61161 states and 70564 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-02 08:22:03,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:22:03,910 INFO L93 Difference]: Finished difference Result 109087 states and 125956 transitions. [2023-12-02 08:22:03,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 08:22:03,910 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 169 [2023-12-02 08:22:03,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:22:04,007 INFO L225 Difference]: With dead ends: 109087 [2023-12-02 08:22:04,007 INFO L226 Difference]: Without dead ends: 66237 [2023-12-02 08:22:04,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 08:22:04,043 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 240 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:22:04,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 443 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 08:22:04,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66237 states. [2023-12-02 08:22:09,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66237 to 60443. [2023-12-02 08:22:09,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60443 states, 51399 states have (on average 1.1477460650985427) internal successors, (58993), 51613 states have internal predecessors, (58993), 4814 states have call successors, (4814), 4123 states have call predecessors, (4814), 4229 states have return successors, (5332), 4707 states have call predecessors, (5332), 4814 states have call successors, (5332) [2023-12-02 08:22:10,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60443 states to 60443 states and 69139 transitions. [2023-12-02 08:22:10,058 INFO L78 Accepts]: Start accepts. Automaton has 60443 states and 69139 transitions. Word has length 169 [2023-12-02 08:22:10,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:22:10,059 INFO L495 AbstractCegarLoop]: Abstraction has 60443 states and 69139 transitions. [2023-12-02 08:22:10,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-02 08:22:10,059 INFO L276 IsEmpty]: Start isEmpty. Operand 60443 states and 69139 transitions. [2023-12-02 08:22:10,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-12-02 08:22:10,085 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:22:10,086 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:22:10,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-12-02 08:22:10,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-12-02 08:22:10,286 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:22:10,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:22:10,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1286972092, now seen corresponding path program 1 times [2023-12-02 08:22:10,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:22:10,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802849862] [2023-12-02 08:22:10,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:22:10,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:22:10,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:22:10,503 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 15 proven. 49 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-12-02 08:22:10,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:22:10,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802849862] [2023-12-02 08:22:10,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802849862] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:22:10,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838430454] [2023-12-02 08:22:10,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:22:10,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:22:10,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:22:10,505 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:22:10,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-02 08:22:10,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:22:10,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 08:22:10,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:22:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-12-02 08:22:10,720 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:22:10,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838430454] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:22:10,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:22:10,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-12-02 08:22:10,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667753084] [2023-12-02 08:22:10,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:22:10,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 08:22:10,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:22:10,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 08:22:10,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 08:22:10,722 INFO L87 Difference]: Start difference. First operand 60443 states and 69139 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 3 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 08:22:17,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:22:17,547 INFO L93 Difference]: Finished difference Result 126888 states and 144310 transitions. [2023-12-02 08:22:17,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 08:22:17,548 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 3 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 183 [2023-12-02 08:22:17,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:22:17,643 INFO L225 Difference]: With dead ends: 126888 [2023-12-02 08:22:17,643 INFO L226 Difference]: Without dead ends: 66515 [2023-12-02 08:22:17,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-12-02 08:22:17,677 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 392 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:22:17,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 291 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 08:22:17,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66515 states. [2023-12-02 08:22:24,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66515 to 66515. [2023-12-02 08:22:24,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66515 states, 56059 states have (on average 1.121158065609447) internal successors, (62851), 56264 states have internal predecessors, (62851), 5616 states have call successors, (5616), 4727 states have call predecessors, (5616), 4839 states have return successors, (6284), 5524 states have call predecessors, (6284), 5616 states have call successors, (6284) [2023-12-02 08:22:24,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66515 states to 66515 states and 74751 transitions. [2023-12-02 08:22:24,311 INFO L78 Accepts]: Start accepts. Automaton has 66515 states and 74751 transitions. Word has length 183 [2023-12-02 08:22:24,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:22:24,311 INFO L495 AbstractCegarLoop]: Abstraction has 66515 states and 74751 transitions. [2023-12-02 08:22:24,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 3 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 08:22:24,311 INFO L276 IsEmpty]: Start isEmpty. Operand 66515 states and 74751 transitions. [2023-12-02 08:22:24,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-12-02 08:22:24,334 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:22:24,334 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:22:24,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-12-02 08:22:24,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-12-02 08:22:24,535 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:22:24,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:22:24,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1270706581, now seen corresponding path program 1 times [2023-12-02 08:22:24,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:22:24,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187101673] [2023-12-02 08:22:24,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:22:24,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:22:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:22:24,810 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-12-02 08:22:24,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:22:24,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187101673] [2023-12-02 08:22:24,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187101673] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:22:24,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39629817] [2023-12-02 08:22:24,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:22:24,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:22:24,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:22:24,811 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:22:24,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-02 08:22:24,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:22:24,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 08:22:24,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:22:24,989 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-12-02 08:22:24,990 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:22:24,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39629817] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:22:24,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:22:24,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 14 [2023-12-02 08:22:24,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334517057] [2023-12-02 08:22:24,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:22:24,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 08:22:24,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:22:24,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 08:22:24,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-12-02 08:22:24,991 INFO L87 Difference]: Start difference. First operand 66515 states and 74751 transitions. Second operand has 6 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 08:22:30,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:22:30,052 INFO L93 Difference]: Finished difference Result 115314 states and 131309 transitions. [2023-12-02 08:22:30,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 08:22:30,053 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 185 [2023-12-02 08:22:30,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:22:30,116 INFO L225 Difference]: With dead ends: 115314 [2023-12-02 08:22:30,116 INFO L226 Difference]: Without dead ends: 48869 [2023-12-02 08:22:30,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-12-02 08:22:30,151 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 169 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:22:30,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 971 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 08:22:30,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48869 states. [2023-12-02 08:22:34,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48869 to 40782. [2023-12-02 08:22:34,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40782 states, 34478 states have (on average 1.1220488427402981) internal successors, (38686), 34653 states have internal predecessors, (38686), 3331 states have call successors, (3331), 2892 states have call predecessors, (3331), 2972 states have return successors, (3763), 3237 states have call predecessors, (3763), 3331 states have call successors, (3763) [2023-12-02 08:22:34,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40782 states to 40782 states and 45780 transitions. [2023-12-02 08:22:34,567 INFO L78 Accepts]: Start accepts. Automaton has 40782 states and 45780 transitions. Word has length 185 [2023-12-02 08:22:34,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:22:34,567 INFO L495 AbstractCegarLoop]: Abstraction has 40782 states and 45780 transitions. [2023-12-02 08:22:34,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 22.0) internal successors, (110), 5 states have internal predecessors, (110), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 08:22:34,567 INFO L276 IsEmpty]: Start isEmpty. Operand 40782 states and 45780 transitions. [2023-12-02 08:22:34,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2023-12-02 08:22:34,576 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:22:34,576 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:22:34,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-12-02 08:22:34,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:22:34,777 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:22:34,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:22:34,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1693359812, now seen corresponding path program 1 times [2023-12-02 08:22:34,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:22:34,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583218406] [2023-12-02 08:22:34,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:22:34,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:22:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:22:35,358 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 42 proven. 68 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-12-02 08:22:35,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:22:35,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583218406] [2023-12-02 08:22:35,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583218406] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:22:35,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895068140] [2023-12-02 08:22:35,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:22:35,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:22:35,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:22:35,360 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:22:35,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-02 08:22:35,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:22:35,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 872 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-02 08:22:35,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:22:35,823 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 140 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 08:22:35,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:22:36,397 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 52 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-12-02 08:22:36,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895068140] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:22:36,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [603031206] [2023-12-02 08:22:36,402 INFO L159 IcfgInterpreter]: Started Sifa with 92 locations of interest [2023-12-02 08:22:36,402 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:22:36,403 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:22:36,403 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:22:36,403 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:23:26,692 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 108 for LOIs [2023-12-02 08:23:26,777 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 118 for LOIs [2023-12-02 08:23:26,849 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 1 for LOIs [2023-12-02 08:23:26,850 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 1 for LOIs [2023-12-02 08:23:26,862 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 79 for LOIs [2023-12-02 08:23:27,329 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 1 for LOIs [2023-12-02 08:23:27,406 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 08:23:34,327 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4009155#(and (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (not (= ~token~0 (+ ~local~0 4))) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (= ~m_pc~0 1) (<= ~t4_pc~0 1) (= ~m_st~0 1) (<= 0 ~t4_pc~0) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|))' at error location [2023-12-02 08:23:34,327 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 08:23:34,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 08:23:34,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 12] total 33 [2023-12-02 08:23:34,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492963589] [2023-12-02 08:23:34,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 08:23:34,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-02 08:23:34,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:23:34,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-02 08:23:34,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=557, Invalid=10155, Unknown=0, NotChecked=0, Total=10712 [2023-12-02 08:23:34,333 INFO L87 Difference]: Start difference. First operand 40782 states and 45780 transitions. Second operand has 33 states, 21 states have (on average 13.285714285714286) internal successors, (279), 26 states have internal predecessors, (279), 13 states have call successors, (42), 9 states have call predecessors, (42), 18 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2023-12-02 08:23:42,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:23:42,920 INFO L93 Difference]: Finished difference Result 89138 states and 101802 transitions. [2023-12-02 08:23:42,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-02 08:23:42,920 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 21 states have (on average 13.285714285714286) internal successors, (279), 26 states have internal predecessors, (279), 13 states have call successors, (42), 9 states have call predecessors, (42), 18 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) Word has length 189 [2023-12-02 08:23:42,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:23:43,008 INFO L225 Difference]: With dead ends: 89138 [2023-12-02 08:23:43,008 INFO L226 Difference]: Without dead ends: 54493 [2023-12-02 08:23:43,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 492 SyntacticMatches, 3 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7005 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1472, Invalid=17160, Unknown=0, NotChecked=0, Total=18632 [2023-12-02 08:23:43,051 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 2283 mSDsluCounter, 1249 mSDsCounter, 0 mSdLazyCounter, 1984 mSolverCounterSat, 703 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2292 SdHoareTripleChecker+Valid, 1381 SdHoareTripleChecker+Invalid, 2687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 1984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:23:43,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2292 Valid, 1381 Invalid, 2687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [703 Valid, 1984 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 08:23:43,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54493 states. [2023-12-02 08:23:46,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54493 to 32727. [2023-12-02 08:23:46,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32727 states, 27357 states have (on average 1.116387030741675) internal successors, (30541), 27571 states have internal predecessors, (30541), 2859 states have call successors, (2859), 2400 states have call predecessors, (2859), 2510 states have return successors, (3059), 2756 states have call predecessors, (3059), 2859 states have call successors, (3059) [2023-12-02 08:23:47,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32727 states to 32727 states and 36459 transitions. [2023-12-02 08:23:47,034 INFO L78 Accepts]: Start accepts. Automaton has 32727 states and 36459 transitions. Word has length 189 [2023-12-02 08:23:47,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:23:47,034 INFO L495 AbstractCegarLoop]: Abstraction has 32727 states and 36459 transitions. [2023-12-02 08:23:47,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 21 states have (on average 13.285714285714286) internal successors, (279), 26 states have internal predecessors, (279), 13 states have call successors, (42), 9 states have call predecessors, (42), 18 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2023-12-02 08:23:47,034 INFO L276 IsEmpty]: Start isEmpty. Operand 32727 states and 36459 transitions. [2023-12-02 08:23:47,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-12-02 08:23:47,043 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:23:47,043 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:23:47,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-12-02 08:23:47,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-12-02 08:23:47,244 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:23:47,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:23:47,244 INFO L85 PathProgramCache]: Analyzing trace with hash 2014771571, now seen corresponding path program 1 times [2023-12-02 08:23:47,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:23:47,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621316817] [2023-12-02 08:23:47,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:23:47,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:23:47,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:23:47,450 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-12-02 08:23:47,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:23:47,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621316817] [2023-12-02 08:23:47,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621316817] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:23:47,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438095216] [2023-12-02 08:23:47,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:23:47,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:23:47,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:23:47,451 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:23:47,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-02 08:23:47,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:23:47,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 08:23:47,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:23:47,661 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-02 08:23:47,661 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:23:47,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438095216] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:23:47,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:23:47,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2023-12-02 08:23:47,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328725289] [2023-12-02 08:23:47,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:23:47,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 08:23:47,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:23:47,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 08:23:47,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:23:47,663 INFO L87 Difference]: Start difference. First operand 32727 states and 36459 transitions. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 5 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2023-12-02 08:23:50,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:23:50,495 INFO L93 Difference]: Finished difference Result 50273 states and 56001 transitions. [2023-12-02 08:23:50,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 08:23:50,496 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 5 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 202 [2023-12-02 08:23:50,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:23:50,520 INFO L225 Difference]: With dead ends: 50273 [2023-12-02 08:23:50,520 INFO L226 Difference]: Without dead ends: 20075 [2023-12-02 08:23:50,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 08:23:50,539 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 251 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:23:50,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 507 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 08:23:50,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20075 states. [2023-12-02 08:23:52,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20075 to 17983. [2023-12-02 08:23:52,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17983 states, 14987 states have (on average 1.0972843130713286) internal successors, (16445), 15114 states have internal predecessors, (16445), 1607 states have call successors, (1607), 1326 states have call predecessors, (1607), 1388 states have return successors, (1723), 1543 states have call predecessors, (1723), 1607 states have call successors, (1723) [2023-12-02 08:23:52,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17983 states to 17983 states and 19775 transitions. [2023-12-02 08:23:52,661 INFO L78 Accepts]: Start accepts. Automaton has 17983 states and 19775 transitions. Word has length 202 [2023-12-02 08:23:52,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:23:52,662 INFO L495 AbstractCegarLoop]: Abstraction has 17983 states and 19775 transitions. [2023-12-02 08:23:52,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 5 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2023-12-02 08:23:52,662 INFO L276 IsEmpty]: Start isEmpty. Operand 17983 states and 19775 transitions. [2023-12-02 08:23:52,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2023-12-02 08:23:52,667 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:23:52,668 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:23:52,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-12-02 08:23:52,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-12-02 08:23:52,868 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:23:52,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:23:52,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1042294067, now seen corresponding path program 1 times [2023-12-02 08:23:52,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:23:52,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903579609] [2023-12-02 08:23:52,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:23:52,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:23:52,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:23:53,139 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2023-12-02 08:23:53,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:23:53,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903579609] [2023-12-02 08:23:53,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903579609] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:23:53,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:23:53,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 08:23:53,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803878643] [2023-12-02 08:23:53,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:23:53,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 08:23:53,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:23:53,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 08:23:53,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 08:23:53,141 INFO L87 Difference]: Start difference. First operand 17983 states and 19775 transitions. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2023-12-02 08:24:01,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:24:01,247 INFO L93 Difference]: Finished difference Result 72683 states and 80061 transitions. [2023-12-02 08:24:01,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 08:24:01,248 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 236 [2023-12-02 08:24:01,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:24:01,334 INFO L225 Difference]: With dead ends: 72683 [2023-12-02 08:24:01,334 INFO L226 Difference]: Without dead ends: 60255 [2023-12-02 08:24:01,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 08:24:01,355 INFO L413 NwaCegarLoop]: 514 mSDtfsCounter, 557 mSDsluCounter, 1531 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 2045 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 08:24:01,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 2045 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 08:24:01,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60255 states. [2023-12-02 08:24:07,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60255 to 43255. [2023-12-02 08:24:07,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43255 states, 35626 states have (on average 1.099421770616965) internal successors, (39168), 35964 states have internal predecessors, (39168), 4149 states have call successors, (4149), 3325 states have call predecessors, (4149), 3479 states have return successors, (4407), 3966 states have call predecessors, (4407), 4149 states have call successors, (4407) [2023-12-02 08:24:07,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43255 states to 43255 states and 47724 transitions. [2023-12-02 08:24:07,113 INFO L78 Accepts]: Start accepts. Automaton has 43255 states and 47724 transitions. Word has length 236 [2023-12-02 08:24:07,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:24:07,114 INFO L495 AbstractCegarLoop]: Abstraction has 43255 states and 47724 transitions. [2023-12-02 08:24:07,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2023-12-02 08:24:07,114 INFO L276 IsEmpty]: Start isEmpty. Operand 43255 states and 47724 transitions. [2023-12-02 08:24:07,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2023-12-02 08:24:07,125 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:24:07,125 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:24:07,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-12-02 08:24:07,126 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:24:07,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:24:07,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1593270706, now seen corresponding path program 1 times [2023-12-02 08:24:07,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:24:07,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996711960] [2023-12-02 08:24:07,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:24:07,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:24:07,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:24:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 71 proven. 104 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2023-12-02 08:24:07,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:24:07,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996711960] [2023-12-02 08:24:07,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996711960] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:24:07,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132064040] [2023-12-02 08:24:07,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:24:07,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:24:07,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:24:07,299 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:24:07,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-02 08:24:07,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:24:07,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 1175 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 08:24:07,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:24:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 328 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2023-12-02 08:24:07,502 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:24:07,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132064040] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:24:07,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:24:07,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2023-12-02 08:24:07,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437203544] [2023-12-02 08:24:07,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:24:07,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 08:24:07,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:24:07,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 08:24:07,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 08:24:07,503 INFO L87 Difference]: Start difference. First operand 43255 states and 47724 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 08:24:11,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:24:11,752 INFO L93 Difference]: Finished difference Result 69830 states and 76841 transitions. [2023-12-02 08:24:11,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 08:24:11,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 279 [2023-12-02 08:24:11,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:24:11,798 INFO L225 Difference]: With dead ends: 69830 [2023-12-02 08:24:11,798 INFO L226 Difference]: Without dead ends: 32979 [2023-12-02 08:24:11,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 08:24:11,829 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 115 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:24:11,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 502 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:24:11,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32979 states. [2023-12-02 08:24:15,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32979 to 27639. [2023-12-02 08:24:15,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27639 states, 22710 states have (on average 1.0919418758256274) internal successors, (24798), 22947 states have internal predecessors, (24798), 2687 states have call successors, (2687), 2127 states have call predecessors, (2687), 2241 states have return successors, (2801), 2565 states have call predecessors, (2801), 2687 states have call successors, (2801) [2023-12-02 08:24:15,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27639 states to 27639 states and 30286 transitions. [2023-12-02 08:24:15,679 INFO L78 Accepts]: Start accepts. Automaton has 27639 states and 30286 transitions. Word has length 279 [2023-12-02 08:24:15,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:24:15,679 INFO L495 AbstractCegarLoop]: Abstraction has 27639 states and 30286 transitions. [2023-12-02 08:24:15,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 08:24:15,680 INFO L276 IsEmpty]: Start isEmpty. Operand 27639 states and 30286 transitions. [2023-12-02 08:24:15,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2023-12-02 08:24:15,687 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:24:15,687 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:24:15,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-12-02 08:24:15,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:24:15,888 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:24:15,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:24:15,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1500772516, now seen corresponding path program 1 times [2023-12-02 08:24:15,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:24:15,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425129819] [2023-12-02 08:24:15,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:24:15,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:24:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:24:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 231 proven. 140 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2023-12-02 08:24:16,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:24:16,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425129819] [2023-12-02 08:24:16,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425129819] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:24:16,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103423457] [2023-12-02 08:24:16,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:24:16,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:24:16,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:24:16,711 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:24:16,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-12-02 08:24:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:24:16,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 1175 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 08:24:16,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:24:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 290 proven. 0 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2023-12-02 08:24:16,923 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:24:16,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103423457] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:24:16,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:24:16,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2023-12-02 08:24:16,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036519767] [2023-12-02 08:24:16,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:24:16,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 08:24:16,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:24:16,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 08:24:16,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-12-02 08:24:16,924 INFO L87 Difference]: Start difference. First operand 27639 states and 30286 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 08:24:19,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:24:19,822 INFO L93 Difference]: Finished difference Result 43780 states and 47858 transitions. [2023-12-02 08:24:19,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 08:24:19,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 280 [2023-12-02 08:24:19,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:24:19,856 INFO L225 Difference]: With dead ends: 43780 [2023-12-02 08:24:19,856 INFO L226 Difference]: Without dead ends: 21982 [2023-12-02 08:24:19,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-12-02 08:24:19,879 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 118 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:24:19,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 504 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:24:19,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21982 states. [2023-12-02 08:24:22,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21982 to 21113. [2023-12-02 08:24:22,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21113 states, 17424 states have (on average 1.0888429752066116) internal successors, (18972), 17602 states have internal predecessors, (18972), 2006 states have call successors, (2006), 1602 states have call predecessors, (2006), 1682 states have return successors, (2086), 1909 states have call predecessors, (2086), 2006 states have call successors, (2086) [2023-12-02 08:24:22,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21113 states to 21113 states and 23064 transitions. [2023-12-02 08:24:22,803 INFO L78 Accepts]: Start accepts. Automaton has 21113 states and 23064 transitions. Word has length 280 [2023-12-02 08:24:22,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:24:22,803 INFO L495 AbstractCegarLoop]: Abstraction has 21113 states and 23064 transitions. [2023-12-02 08:24:22,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 08:24:22,804 INFO L276 IsEmpty]: Start isEmpty. Operand 21113 states and 23064 transitions. [2023-12-02 08:24:22,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2023-12-02 08:24:22,812 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:24:22,812 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:24:22,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-12-02 08:24:23,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-12-02 08:24:23,012 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:24:23,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:24:23,013 INFO L85 PathProgramCache]: Analyzing trace with hash -193006366, now seen corresponding path program 2 times [2023-12-02 08:24:23,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:24:23,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676871899] [2023-12-02 08:24:23,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:24:23,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:24:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:24:23,170 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 129 proven. 103 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2023-12-02 08:24:23,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:24:23,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676871899] [2023-12-02 08:24:23,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676871899] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:24:23,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786049321] [2023-12-02 08:24:23,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 08:24:23,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:24:23,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:24:23,172 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:24:23,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-12-02 08:24:23,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 08:24:23,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 08:24:23,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 08:24:23,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:24:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-12-02 08:24:23,319 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:24:23,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786049321] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:24:23,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:24:23,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2023-12-02 08:24:23,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786094945] [2023-12-02 08:24:23,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:24:23,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 08:24:23,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:24:23,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 08:24:23,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 08:24:23,321 INFO L87 Difference]: Start difference. First operand 21113 states and 23064 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 08:24:25,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:24:25,725 INFO L93 Difference]: Finished difference Result 32197 states and 35034 transitions. [2023-12-02 08:24:25,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 08:24:25,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 280 [2023-12-02 08:24:25,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:24:25,748 INFO L225 Difference]: With dead ends: 32197 [2023-12-02 08:24:25,748 INFO L226 Difference]: Without dead ends: 16925 [2023-12-02 08:24:25,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 08:24:25,765 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 88 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:24:25,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 475 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:24:25,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16925 states. [2023-12-02 08:24:28,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16925 to 16890. [2023-12-02 08:24:28,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16890 states, 13915 states have (on average 1.0790513833992095) internal successors, (15015), 14065 states have internal predecessors, (15015), 1628 states have call successors, (1628), 1290 states have call predecessors, (1628), 1346 states have return successors, (1684), 1535 states have call predecessors, (1684), 1628 states have call successors, (1684) [2023-12-02 08:24:28,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16890 states to 16890 states and 18327 transitions. [2023-12-02 08:24:28,157 INFO L78 Accepts]: Start accepts. Automaton has 16890 states and 18327 transitions. Word has length 280 [2023-12-02 08:24:28,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:24:28,157 INFO L495 AbstractCegarLoop]: Abstraction has 16890 states and 18327 transitions. [2023-12-02 08:24:28,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-02 08:24:28,157 INFO L276 IsEmpty]: Start isEmpty. Operand 16890 states and 18327 transitions. [2023-12-02 08:24:28,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2023-12-02 08:24:28,165 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:24:28,165 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:24:28,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-12-02 08:24:28,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-12-02 08:24:28,365 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:24:28,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:24:28,366 INFO L85 PathProgramCache]: Analyzing trace with hash 599380339, now seen corresponding path program 1 times [2023-12-02 08:24:28,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:24:28,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969392425] [2023-12-02 08:24:28,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:24:28,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:24:28,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:24:28,893 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 175 proven. 134 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2023-12-02 08:24:28,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:24:28,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969392425] [2023-12-02 08:24:28,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969392425] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:24:28,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809252179] [2023-12-02 08:24:28,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:24:28,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:24:28,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:24:28,894 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:24:28,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-12-02 08:24:29,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:24:29,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 1181 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 08:24:29,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:24:29,177 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 388 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-12-02 08:24:29,177 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 08:24:29,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809252179] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:24:29,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 08:24:29,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2023-12-02 08:24:29,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922859522] [2023-12-02 08:24:29,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:24:29,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 08:24:29,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:24:29,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 08:24:29,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-12-02 08:24:29,178 INFO L87 Difference]: Start difference. First operand 16890 states and 18327 transitions. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 5 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-12-02 08:24:30,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:24:30,039 INFO L93 Difference]: Finished difference Result 18858 states and 20475 transitions. [2023-12-02 08:24:30,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 08:24:30,039 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 5 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 281 [2023-12-02 08:24:30,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:24:30,040 INFO L225 Difference]: With dead ends: 18858 [2023-12-02 08:24:30,040 INFO L226 Difference]: Without dead ends: 0 [2023-12-02 08:24:30,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-12-02 08:24:30,052 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 235 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:24:30,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 482 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 08:24:30,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-02 08:24:30,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-02 08:24:30,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 08:24:30,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-02 08:24:30,054 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 281 [2023-12-02 08:24:30,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:24:30,054 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-02 08:24:30,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 5 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-12-02 08:24:30,054 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-02 08:24:30,054 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-02 08:24:30,056 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-02 08:24:30,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-12-02 08:24:30,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8685ea48-dcb8-4064-bfe1-8fab0df0cc17/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:24:30,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-02 08:24:43,402 WARN L293 SmtUtils]: Spent 13.02s on a formula simplification. DAG size of input: 132 DAG size of output: 89 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2023-12-02 08:24:54,374 WARN L293 SmtUtils]: Spent 10.97s on a formula simplification. DAG size of input: 178 DAG size of output: 83 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2023-12-02 08:25:17,003 WARN L293 SmtUtils]: Spent 7.12s on a formula simplification. DAG size of input: 129 DAG size of output: 89 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2023-12-02 08:25:33,278 WARN L293 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 135 DAG size of output: 83 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2023-12-02 08:25:50,913 WARN L293 SmtUtils]: Spent 14.63s on a formula simplification. DAG size of input: 154 DAG size of output: 106 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2023-12-02 08:26:20,544 WARN L293 SmtUtils]: Spent 29.63s on a formula simplification. DAG size of input: 128 DAG size of output: 109 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2023-12-02 08:26:29,252 WARN L293 SmtUtils]: Spent 8.62s on a formula simplification. DAG size of input: 151 DAG size of output: 106 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)