./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label48.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label48.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --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 3f14d4f9bc9aeaf37fb25f1f86f7bc3a3a5a6ca0e3e96922bca4446f4d37ab9f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 22:27:27,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:27:27,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:27:27,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:27:27,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:27:27,590 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:27:27,593 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:27:27,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:27:27,599 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:27:27,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:27:27,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:27:27,610 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:27:27,610 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:27:27,611 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:27:27,612 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:27:27,614 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:27:27,614 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:27:27,615 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:27:27,617 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:27:27,619 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:27:27,629 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:27:27,631 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:27:27,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:27:27,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:27:27,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:27:27,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:27:27,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:27:27,639 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:27:27,639 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:27:27,640 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:27:27,641 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:27:27,641 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:27:27,642 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:27:27,643 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:27:27,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:27:27,644 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:27:27,645 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:27:27,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:27:27,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:27:27,675 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:27:27,677 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:27:27,678 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 22:27:27,722 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:27:27,722 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:27:27,723 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:27:27,723 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:27:27,724 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:27:27,725 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:27:27,725 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:27:27,725 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:27:27,725 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:27:27,726 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:27:27,727 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:27:27,727 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:27:27,728 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:27:27,728 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:27:27,728 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:27:27,728 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:27:27,729 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:27:27,729 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:27:27,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:27:27,730 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:27:27,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:27:27,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:27:27,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:27:27,731 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:27:27,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:27:27,732 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:27:27,732 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:27:27,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:27:27,733 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:27:27,733 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:27:27,733 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:27:27,733 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:27:27,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:27:27,734 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:27:27,734 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:27:27,734 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:27:27,735 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:27:27,735 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:27:27,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:27:27,735 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:27:27,736 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:27:27,736 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f14d4f9bc9aeaf37fb25f1f86f7bc3a3a5a6ca0e3e96922bca4446f4d37ab9f [2022-11-25 22:27:28,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:27:28,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:27:28,054 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:27:28,055 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:27:28,056 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:27:28,057 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/eca-rers2012/Problem03_label48.c [2022-11-25 22:27:31,191 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:27:31,624 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:27:31,624 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/sv-benchmarks/c/eca-rers2012/Problem03_label48.c [2022-11-25 22:27:31,643 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/data/acbca87cb/c8329981b5844fa1a40488096444c88d/FLAG8967b05c9 [2022-11-25 22:27:31,661 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/data/acbca87cb/c8329981b5844fa1a40488096444c88d [2022-11-25 22:27:31,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:27:31,668 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:27:31,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:27:31,671 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:27:31,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:27:31,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:27:31" (1/1) ... [2022-11-25 22:27:31,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@310c771a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:27:31, skipping insertion in model container [2022-11-25 22:27:31,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:27:31" (1/1) ... [2022-11-25 22:27:31,687 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:27:31,778 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:27:32,439 WARN L237 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_f581a0bf-b64f-47e3-9735-5caf569a2001/sv-benchmarks/c/eca-rers2012/Problem03_label48.c[58935,58948] [2022-11-25 22:27:32,482 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:27:32,496 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:27:32,834 WARN L237 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_f581a0bf-b64f-47e3-9735-5caf569a2001/sv-benchmarks/c/eca-rers2012/Problem03_label48.c[58935,58948] [2022-11-25 22:27:32,846 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:27:32,865 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:27:32,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:27:32 WrapperNode [2022-11-25 22:27:32,866 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:27:32,867 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:27:32,867 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:27:32,867 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:27:32,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:27:32" (1/1) ... [2022-11-25 22:27:32,911 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:27:32" (1/1) ... [2022-11-25 22:27:33,021 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-11-25 22:27:33,022 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:27:33,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:27:33,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:27:33,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:27:33,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:27:32" (1/1) ... [2022-11-25 22:27:33,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:27:32" (1/1) ... [2022-11-25 22:27:33,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:27:32" (1/1) ... [2022-11-25 22:27:33,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:27:32" (1/1) ... [2022-11-25 22:27:33,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:27:32" (1/1) ... [2022-11-25 22:27:33,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:27:32" (1/1) ... [2022-11-25 22:27:33,135 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:27:32" (1/1) ... [2022-11-25 22:27:33,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:27:32" (1/1) ... [2022-11-25 22:27:33,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:27:33,187 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:27:33,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:27:33,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:27:33,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:27:32" (1/1) ... [2022-11-25 22:27:33,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:27:33,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:27:33,224 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:27:33,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:27:33,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:27:33,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:27:33,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:27:33,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:27:33,375 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:27:33,378 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:27:35,574 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:27:36,034 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:27:36,034 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 22:27:36,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:27:36 BoogieIcfgContainer [2022-11-25 22:27:36,038 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:27:36,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:27:36,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:27:36,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:27:36,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:27:31" (1/3) ... [2022-11-25 22:27:36,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3450a3e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:27:36, skipping insertion in model container [2022-11-25 22:27:36,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:27:32" (2/3) ... [2022-11-25 22:27:36,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3450a3e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:27:36, skipping insertion in model container [2022-11-25 22:27:36,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:27:36" (3/3) ... [2022-11-25 22:27:36,056 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label48.c [2022-11-25 22:27:36,078 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:27:36,078 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 22:27:36,155 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:27:36,162 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=LoopsAndPotentialCycles, 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;@71ef7c60, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:27:36,163 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 22:27:36,171 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 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) [2022-11-25 22:27:36,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-25 22:27:36,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:36,193 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:27:36,194 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:36,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:36,203 INFO L85 PathProgramCache]: Analyzing trace with hash 209349882, now seen corresponding path program 1 times [2022-11-25 22:27:36,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:36,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255146785] [2022-11-25 22:27:36,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:36,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:27:37,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:37,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255146785] [2022-11-25 22:27:37,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255146785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:27:37,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:27:37,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:27:37,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031836778] [2022-11-25 22:27:37,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:27:37,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:27:37,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:37,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:27:37,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:27:37,287 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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) [2022-11-25 22:27:38,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:38,338 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2022-11-25 22:27:38,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:27:38,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2022-11-25 22:27:38,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:38,353 INFO L225 Difference]: With dead ends: 440 [2022-11-25 22:27:38,353 INFO L226 Difference]: Without dead ends: 289 [2022-11-25 22:27:38,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:27:38,360 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 38 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:38,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 51 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 22:27:38,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-25 22:27:38,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-11-25 22:27:38,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.8090277777777777) internal successors, (521), 288 states have internal predecessors, (521), 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) [2022-11-25 22:27:38,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 521 transitions. [2022-11-25 22:27:38,416 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 521 transitions. Word has length 143 [2022-11-25 22:27:38,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:38,418 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 521 transitions. [2022-11-25 22:27:38,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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) [2022-11-25 22:27:38,418 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 521 transitions. [2022-11-25 22:27:38,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-25 22:27:38,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:38,422 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:27:38,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:27:38,423 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:38,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:38,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1094390169, now seen corresponding path program 1 times [2022-11-25 22:27:38,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:38,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291076472] [2022-11-25 22:27:38,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:38,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:38,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:38,715 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:27:38,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:38,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291076472] [2022-11-25 22:27:38,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291076472] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:27:38,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:27:38,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:27:38,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294322848] [2022-11-25 22:27:38,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:27:38,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:27:38,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:38,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:27:38,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:27:38,720 INFO L87 Difference]: Start difference. First operand 289 states and 521 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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) [2022-11-25 22:27:39,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:39,633 INFO L93 Difference]: Finished difference Result 863 states and 1560 transitions. [2022-11-25 22:27:39,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:27:39,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2022-11-25 22:27:39,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:39,637 INFO L225 Difference]: With dead ends: 863 [2022-11-25 22:27:39,637 INFO L226 Difference]: Without dead ends: 575 [2022-11-25 22:27:39,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:27:39,640 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 159 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:39,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 22 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 22:27:39,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-11-25 22:27:39,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2022-11-25 22:27:39,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.7682926829268293) internal successors, (1015), 574 states have internal predecessors, (1015), 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) [2022-11-25 22:27:39,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1015 transitions. [2022-11-25 22:27:39,697 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1015 transitions. Word has length 151 [2022-11-25 22:27:39,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:39,700 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 1015 transitions. [2022-11-25 22:27:39,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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) [2022-11-25 22:27:39,701 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1015 transitions. [2022-11-25 22:27:39,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-25 22:27:39,715 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:39,715 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:27:39,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 22:27:39,716 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:39,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:39,717 INFO L85 PathProgramCache]: Analyzing trace with hash 631562266, now seen corresponding path program 1 times [2022-11-25 22:27:39,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:39,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397336203] [2022-11-25 22:27:39,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:39,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:39,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:40,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:27:40,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:40,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397336203] [2022-11-25 22:27:40,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397336203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:27:40,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:27:40,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:27:40,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255414913] [2022-11-25 22:27:40,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:27:40,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:27:40,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:40,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:27:40,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:27:40,030 INFO L87 Difference]: Start difference. First operand 575 states and 1015 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 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) [2022-11-25 22:27:40,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:40,908 INFO L93 Difference]: Finished difference Result 1723 states and 3043 transitions. [2022-11-25 22:27:40,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:27:40,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-25 22:27:40,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:40,913 INFO L225 Difference]: With dead ends: 1723 [2022-11-25 22:27:40,914 INFO L226 Difference]: Without dead ends: 1149 [2022-11-25 22:27:40,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:27:40,917 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 171 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:40,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 43 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 22:27:40,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-11-25 22:27:40,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1147. [2022-11-25 22:27:40,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.6413612565445026) internal successors, (1881), 1146 states have internal predecessors, (1881), 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) [2022-11-25 22:27:40,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1881 transitions. [2022-11-25 22:27:40,989 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1881 transitions. Word has length 152 [2022-11-25 22:27:40,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:40,990 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1881 transitions. [2022-11-25 22:27:40,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 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) [2022-11-25 22:27:40,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1881 transitions. [2022-11-25 22:27:40,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-25 22:27:40,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:40,997 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:27:40,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 22:27:40,997 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:40,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:40,998 INFO L85 PathProgramCache]: Analyzing trace with hash 14518036, now seen corresponding path program 1 times [2022-11-25 22:27:40,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:40,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106317760] [2022-11-25 22:27:40,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:41,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:41,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:41,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:27:41,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:41,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106317760] [2022-11-25 22:27:41,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106317760] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:27:41,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:27:41,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:27:41,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915946580] [2022-11-25 22:27:41,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:27:41,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:27:41,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:41,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:27:41,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:27:41,392 INFO L87 Difference]: Start difference. First operand 1147 states and 1881 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 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) [2022-11-25 22:27:42,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:42,382 INFO L93 Difference]: Finished difference Result 2865 states and 4676 transitions. [2022-11-25 22:27:42,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:27:42,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2022-11-25 22:27:42,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:42,390 INFO L225 Difference]: With dead ends: 2865 [2022-11-25 22:27:42,390 INFO L226 Difference]: Without dead ends: 1719 [2022-11-25 22:27:42,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:27:42,394 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 157 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:42,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 33 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 22:27:42,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2022-11-25 22:27:42,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1719. [2022-11-25 22:27:42,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.5948777648428405) internal successors, (2740), 1718 states have internal predecessors, (2740), 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) [2022-11-25 22:27:42,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2740 transitions. [2022-11-25 22:27:42,439 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2740 transitions. Word has length 153 [2022-11-25 22:27:42,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:42,439 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 2740 transitions. [2022-11-25 22:27:42,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 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) [2022-11-25 22:27:42,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2740 transitions. [2022-11-25 22:27:42,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-25 22:27:42,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:42,445 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:27:42,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 22:27:42,446 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:42,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:42,446 INFO L85 PathProgramCache]: Analyzing trace with hash -316848354, now seen corresponding path program 1 times [2022-11-25 22:27:42,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:42,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53142595] [2022-11-25 22:27:42,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:42,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:42,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:43,396 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:27:43,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:43,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53142595] [2022-11-25 22:27:43,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53142595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:27:43,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:27:43,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:27:43,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729266636] [2022-11-25 22:27:43,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:27:43,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:27:43,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:43,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:27:43,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:27:43,404 INFO L87 Difference]: Start difference. First operand 1719 states and 2740 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 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) [2022-11-25 22:27:44,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:44,486 INFO L93 Difference]: Finished difference Result 3719 states and 5984 transitions. [2022-11-25 22:27:44,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:27:44,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2022-11-25 22:27:44,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:44,494 INFO L225 Difference]: With dead ends: 3719 [2022-11-25 22:27:44,497 INFO L226 Difference]: Without dead ends: 1719 [2022-11-25 22:27:44,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:27:44,509 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 219 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:44,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 11 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 22:27:44,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2022-11-25 22:27:44,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1719. [2022-11-25 22:27:44,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.4412107101280558) internal successors, (2476), 1718 states have internal predecessors, (2476), 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) [2022-11-25 22:27:44,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2476 transitions. [2022-11-25 22:27:44,571 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2476 transitions. Word has length 158 [2022-11-25 22:27:44,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:44,573 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 2476 transitions. [2022-11-25 22:27:44,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 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) [2022-11-25 22:27:44,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2476 transitions. [2022-11-25 22:27:44,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-25 22:27:44,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:44,588 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:27:44,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 22:27:44,589 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:44,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:44,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1023962969, now seen corresponding path program 1 times [2022-11-25 22:27:44,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:44,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969492103] [2022-11-25 22:27:44,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:44,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:44,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:45,073 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:27:45,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:45,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969492103] [2022-11-25 22:27:45,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969492103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:27:45,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:27:45,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:27:45,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689645820] [2022-11-25 22:27:45,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:27:45,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:27:45,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:45,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:27:45,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:27:45,078 INFO L87 Difference]: Start difference. First operand 1719 states and 2476 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 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) [2022-11-25 22:27:45,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:45,896 INFO L93 Difference]: Finished difference Result 5153 states and 7425 transitions. [2022-11-25 22:27:45,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:27:45,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-11-25 22:27:45,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:45,908 INFO L225 Difference]: With dead ends: 5153 [2022-11-25 22:27:45,908 INFO L226 Difference]: Without dead ends: 3435 [2022-11-25 22:27:45,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:27:45,914 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 142 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:45,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 76 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 22:27:45,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2022-11-25 22:27:46,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 3435. [2022-11-25 22:27:46,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 1.2813046010483402) internal successors, (4400), 3434 states have internal predecessors, (4400), 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) [2022-11-25 22:27:46,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 4400 transitions. [2022-11-25 22:27:46,020 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 4400 transitions. Word has length 160 [2022-11-25 22:27:46,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:46,020 INFO L495 AbstractCegarLoop]: Abstraction has 3435 states and 4400 transitions. [2022-11-25 22:27:46,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 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) [2022-11-25 22:27:46,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 4400 transitions. [2022-11-25 22:27:46,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-25 22:27:46,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:46,027 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:27:46,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 22:27:46,028 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:46,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:46,029 INFO L85 PathProgramCache]: Analyzing trace with hash 10691747, now seen corresponding path program 1 times [2022-11-25 22:27:46,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:46,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502559173] [2022-11-25 22:27:46,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:46,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:46,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:46,798 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:27:46,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:46,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502559173] [2022-11-25 22:27:46,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502559173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:27:46,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:27:46,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:27:46,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840242135] [2022-11-25 22:27:46,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:27:46,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:27:46,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:46,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:27:46,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:27:46,802 INFO L87 Difference]: Start difference. First operand 3435 states and 4400 transitions. Second operand has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 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) [2022-11-25 22:27:48,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:48,059 INFO L93 Difference]: Finished difference Result 7868 states and 10135 transitions. [2022-11-25 22:27:48,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:27:48,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2022-11-25 22:27:48,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:48,077 INFO L225 Difference]: With dead ends: 7868 [2022-11-25 22:27:48,077 INFO L226 Difference]: Without dead ends: 4293 [2022-11-25 22:27:48,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:27:48,085 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 122 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:48,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 62 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-25 22:27:48,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4293 states. [2022-11-25 22:27:48,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4293 to 4293. [2022-11-25 22:27:48,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4293 states, 4292 states have (on average 1.283550792171482) internal successors, (5509), 4292 states have internal predecessors, (5509), 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) [2022-11-25 22:27:48,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4293 states to 4293 states and 5509 transitions. [2022-11-25 22:27:48,208 INFO L78 Accepts]: Start accepts. Automaton has 4293 states and 5509 transitions. Word has length 174 [2022-11-25 22:27:48,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:48,208 INFO L495 AbstractCegarLoop]: Abstraction has 4293 states and 5509 transitions. [2022-11-25 22:27:48,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 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) [2022-11-25 22:27:48,209 INFO L276 IsEmpty]: Start isEmpty. Operand 4293 states and 5509 transitions. [2022-11-25 22:27:48,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-11-25 22:27:48,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:48,219 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:27:48,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 22:27:48,219 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:48,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:48,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1441040766, now seen corresponding path program 1 times [2022-11-25 22:27:48,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:48,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303072167] [2022-11-25 22:27:48,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:48,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:48,696 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:27:48,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:48,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303072167] [2022-11-25 22:27:48,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303072167] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:27:48,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022505514] [2022-11-25 22:27:48,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:48,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:48,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:27:48,703 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:27:48,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:27:48,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:48,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 22:27:48,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-25 22:27:49,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:27:49,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022505514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:27:49,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:27:49,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-25 22:27:49,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110988131] [2022-11-25 22:27:49,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:27:49,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:27:49,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:49,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:27:49,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:27:49,276 INFO L87 Difference]: Start difference. First operand 4293 states and 5509 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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) [2022-11-25 22:27:50,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:50,151 INFO L93 Difference]: Finished difference Result 9157 states and 11863 transitions. [2022-11-25 22:27:50,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:27:50,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2022-11-25 22:27:50,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:50,175 INFO L225 Difference]: With dead ends: 9157 [2022-11-25 22:27:50,175 INFO L226 Difference]: Without dead ends: 4865 [2022-11-25 22:27:50,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:27:50,182 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:50,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 200 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 22:27:50,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4865 states. [2022-11-25 22:27:50,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4865 to 4865. [2022-11-25 22:27:50,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4865 states, 4864 states have (on average 1.2939967105263157) internal successors, (6294), 4864 states have internal predecessors, (6294), 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) [2022-11-25 22:27:50,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4865 states to 4865 states and 6294 transitions. [2022-11-25 22:27:50,337 INFO L78 Accepts]: Start accepts. Automaton has 4865 states and 6294 transitions. Word has length 181 [2022-11-25 22:27:50,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:50,339 INFO L495 AbstractCegarLoop]: Abstraction has 4865 states and 6294 transitions. [2022-11-25 22:27:50,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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) [2022-11-25 22:27:50,340 INFO L276 IsEmpty]: Start isEmpty. Operand 4865 states and 6294 transitions. [2022-11-25 22:27:50,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-11-25 22:27:50,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:50,351 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:27:50,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 22:27:50,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:50,568 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:50,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:50,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1153488478, now seen corresponding path program 1 times [2022-11-25 22:27:50,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:50,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741991510] [2022-11-25 22:27:50,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:50,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:50,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:51,024 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:27:51,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:51,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741991510] [2022-11-25 22:27:51,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741991510] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:27:51,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627042954] [2022-11-25 22:27:51,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:51,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:51,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:27:51,027 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:27:51,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:27:51,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:51,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 22:27:51,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:51,533 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 22:27:51,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:27:51,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627042954] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:27:51,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:27:51,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-25 22:27:51,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183769154] [2022-11-25 22:27:51,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:27:51,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:27:51,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:51,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:27:51,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:27:51,536 INFO L87 Difference]: Start difference. First operand 4865 states and 6294 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 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) [2022-11-25 22:27:52,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:52,371 INFO L93 Difference]: Finished difference Result 12589 states and 16663 transitions. [2022-11-25 22:27:52,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:27:52,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2022-11-25 22:27:52,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:52,413 INFO L225 Difference]: With dead ends: 12589 [2022-11-25 22:27:52,413 INFO L226 Difference]: Without dead ends: 7725 [2022-11-25 22:27:52,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:27:52,422 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:52,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 223 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 22:27:52,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7725 states. [2022-11-25 22:27:52,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7725 to 7439. [2022-11-25 22:27:52,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7439 states, 7438 states have (on average 1.2264049475665502) internal successors, (9122), 7438 states have internal predecessors, (9122), 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) [2022-11-25 22:27:52,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7439 states to 7439 states and 9122 transitions. [2022-11-25 22:27:52,623 INFO L78 Accepts]: Start accepts. Automaton has 7439 states and 9122 transitions. Word has length 187 [2022-11-25 22:27:52,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:52,623 INFO L495 AbstractCegarLoop]: Abstraction has 7439 states and 9122 transitions. [2022-11-25 22:27:52,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 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) [2022-11-25 22:27:52,624 INFO L276 IsEmpty]: Start isEmpty. Operand 7439 states and 9122 transitions. [2022-11-25 22:27:52,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-11-25 22:27:52,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:52,635 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:27:52,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 22:27:52,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 22:27:52,842 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:52,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:52,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1315649499, now seen corresponding path program 1 times [2022-11-25 22:27:52,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:52,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322672367] [2022-11-25 22:27:52,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:52,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:52,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:53,403 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:27:53,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:53,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322672367] [2022-11-25 22:27:53,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322672367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:27:53,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:27:53,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:27:53,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146541900] [2022-11-25 22:27:53,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:27:53,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:27:53,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:53,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:27:53,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:27:53,405 INFO L87 Difference]: Start difference. First operand 7439 states and 9122 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 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) [2022-11-25 22:27:54,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:54,151 INFO L93 Difference]: Finished difference Result 16021 states and 19549 transitions. [2022-11-25 22:27:54,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:27:54,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2022-11-25 22:27:54,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:54,171 INFO L225 Difference]: With dead ends: 16021 [2022-11-25 22:27:54,172 INFO L226 Difference]: Without dead ends: 8583 [2022-11-25 22:27:54,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:27:54,181 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 89 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:54,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 52 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 22:27:54,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8583 states. [2022-11-25 22:27:54,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8583 to 8583. [2022-11-25 22:27:54,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8583 states, 8582 states have (on average 1.2130039617804707) internal successors, (10410), 8582 states have internal predecessors, (10410), 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) [2022-11-25 22:27:54,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8583 states to 8583 states and 10410 transitions. [2022-11-25 22:27:54,431 INFO L78 Accepts]: Start accepts. Automaton has 8583 states and 10410 transitions. Word has length 206 [2022-11-25 22:27:54,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:54,431 INFO L495 AbstractCegarLoop]: Abstraction has 8583 states and 10410 transitions. [2022-11-25 22:27:54,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 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) [2022-11-25 22:27:54,432 INFO L276 IsEmpty]: Start isEmpty. Operand 8583 states and 10410 transitions. [2022-11-25 22:27:54,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-11-25 22:27:54,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:54,443 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:27:54,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 22:27:54,444 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:54,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:54,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1345060608, now seen corresponding path program 1 times [2022-11-25 22:27:54,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:54,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174192599] [2022-11-25 22:27:54,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:54,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 69 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:27:55,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:55,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174192599] [2022-11-25 22:27:55,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174192599] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:27:55,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566216964] [2022-11-25 22:27:55,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:55,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:55,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:27:55,343 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:27:55,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:27:55,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:55,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:27:55,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:55,869 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:27:55,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:27:55,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566216964] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:27:55,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:27:55,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-25 22:27:55,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52102172] [2022-11-25 22:27:55,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:27:55,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:27:55,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:55,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:27:55,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:27:55,872 INFO L87 Difference]: Start difference. First operand 8583 states and 10410 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 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) [2022-11-25 22:27:56,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:56,725 INFO L93 Difference]: Finished difference Result 22885 states and 27692 transitions. [2022-11-25 22:27:56,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:27:56,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 213 [2022-11-25 22:27:56,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:56,752 INFO L225 Difference]: With dead ends: 22885 [2022-11-25 22:27:56,752 INFO L226 Difference]: Without dead ends: 14303 [2022-11-25 22:27:56,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:27:56,764 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 88 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:56,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 71 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 22:27:56,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14303 states. [2022-11-25 22:27:57,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14303 to 14303. [2022-11-25 22:27:57,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14303 states, 14302 states have (on average 1.1762690532792617) internal successors, (16823), 14302 states have internal predecessors, (16823), 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) [2022-11-25 22:27:57,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14303 states to 14303 states and 16823 transitions. [2022-11-25 22:27:57,116 INFO L78 Accepts]: Start accepts. Automaton has 14303 states and 16823 transitions. Word has length 213 [2022-11-25 22:27:57,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:57,116 INFO L495 AbstractCegarLoop]: Abstraction has 14303 states and 16823 transitions. [2022-11-25 22:27:57,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 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) [2022-11-25 22:27:57,117 INFO L276 IsEmpty]: Start isEmpty. Operand 14303 states and 16823 transitions. [2022-11-25 22:27:57,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-11-25 22:27:57,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:57,138 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:27:57,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 22:27:57,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 22:27:57,356 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:57,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:57,356 INFO L85 PathProgramCache]: Analyzing trace with hash 189651727, now seen corresponding path program 1 times [2022-11-25 22:27:57,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:57,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734564907] [2022-11-25 22:27:57,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:57,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:57,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:59,480 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 30 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:27:59,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:27:59,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734564907] [2022-11-25 22:27:59,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734564907] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:27:59,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321911970] [2022-11-25 22:27:59,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:59,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:27:59,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:27:59,483 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:27:59,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 22:27:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:27:59,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 22:27:59,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:27:59,930 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:27:59,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:27:59,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321911970] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:27:59,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:27:59,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-25 22:27:59,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563546128] [2022-11-25 22:27:59,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:27:59,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:27:59,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:59,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:27:59,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:27:59,937 INFO L87 Difference]: Start difference. First operand 14303 states and 16823 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 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) [2022-11-25 22:28:00,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:00,834 INFO L93 Difference]: Finished difference Result 31465 states and 37591 transitions. [2022-11-25 22:28:00,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:28:00,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2022-11-25 22:28:00,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:00,867 INFO L225 Difference]: With dead ends: 31465 [2022-11-25 22:28:00,868 INFO L226 Difference]: Without dead ends: 17163 [2022-11-25 22:28:00,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:28:00,885 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 43 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:00,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 175 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 22:28:00,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17163 states. [2022-11-25 22:28:01,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17163 to 16877. [2022-11-25 22:28:01,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16877 states, 16876 states have (on average 1.196077269495141) internal successors, (20185), 16876 states have internal predecessors, (20185), 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) [2022-11-25 22:28:01,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16877 states to 16877 states and 20185 transitions. [2022-11-25 22:28:01,332 INFO L78 Accepts]: Start accepts. Automaton has 16877 states and 20185 transitions. Word has length 239 [2022-11-25 22:28:01,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:01,332 INFO L495 AbstractCegarLoop]: Abstraction has 16877 states and 20185 transitions. [2022-11-25 22:28:01,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 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) [2022-11-25 22:28:01,333 INFO L276 IsEmpty]: Start isEmpty. Operand 16877 states and 20185 transitions. [2022-11-25 22:28:01,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-11-25 22:28:01,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:01,365 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:28:01,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 22:28:01,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:01,572 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:01,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:01,572 INFO L85 PathProgramCache]: Analyzing trace with hash -604046065, now seen corresponding path program 1 times [2022-11-25 22:28:01,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:01,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568258736] [2022-11-25 22:28:01,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:01,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:02,292 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 102 proven. 6 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-25 22:28:02,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:02,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568258736] [2022-11-25 22:28:02,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568258736] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:28:02,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083116984] [2022-11-25 22:28:02,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:02,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:02,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:02,295 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:02,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 22:28:02,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:02,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 22:28:02,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:28:02,755 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-25 22:28:02,755 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:28:02,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083116984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:28:02,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:28:02,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-25 22:28:02,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072959080] [2022-11-25 22:28:02,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:28:02,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:28:02,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:02,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:28:02,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:28:02,759 INFO L87 Difference]: Start difference. First operand 16877 states and 20185 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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) [2022-11-25 22:28:03,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:03,710 INFO L93 Difference]: Finished difference Result 45622 states and 54476 transitions. [2022-11-25 22:28:03,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:28:03,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2022-11-25 22:28:03,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:03,765 INFO L225 Difference]: With dead ends: 45622 [2022-11-25 22:28:03,765 INFO L226 Difference]: Without dead ends: 28746 [2022-11-25 22:28:03,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:28:03,784 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 24 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:03,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 70 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 22:28:03,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28746 states. [2022-11-25 22:28:04,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28746 to 26172. [2022-11-25 22:28:04,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26172 states, 26171 states have (on average 1.1873065606969546) internal successors, (31073), 26171 states have internal predecessors, (31073), 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) [2022-11-25 22:28:04,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26172 states to 26172 states and 31073 transitions. [2022-11-25 22:28:04,300 INFO L78 Accepts]: Start accepts. Automaton has 26172 states and 31073 transitions. Word has length 253 [2022-11-25 22:28:04,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:04,301 INFO L495 AbstractCegarLoop]: Abstraction has 26172 states and 31073 transitions. [2022-11-25 22:28:04,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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) [2022-11-25 22:28:04,301 INFO L276 IsEmpty]: Start isEmpty. Operand 26172 states and 31073 transitions. [2022-11-25 22:28:04,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-11-25 22:28:04,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:04,348 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:28:04,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 22:28:04,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:04,554 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:04,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:04,555 INFO L85 PathProgramCache]: Analyzing trace with hash -2033454439, now seen corresponding path program 1 times [2022-11-25 22:28:04,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:04,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010137653] [2022-11-25 22:28:04,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:04,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:04,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:05,326 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-25 22:28:05,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:05,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010137653] [2022-11-25 22:28:05,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010137653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:28:05,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:28:05,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:28:05,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496997707] [2022-11-25 22:28:05,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:28:05,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:28:05,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:05,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:28:05,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:28:05,329 INFO L87 Difference]: Start difference. First operand 26172 states and 31073 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 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) [2022-11-25 22:28:06,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:06,090 INFO L93 Difference]: Finished difference Result 52629 states and 62452 transitions. [2022-11-25 22:28:06,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:28:06,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 280 [2022-11-25 22:28:06,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:06,143 INFO L225 Difference]: With dead ends: 52629 [2022-11-25 22:28:06,143 INFO L226 Difference]: Without dead ends: 26458 [2022-11-25 22:28:06,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:28:06,159 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 72 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:06,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 80 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 22:28:06,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26458 states. [2022-11-25 22:28:06,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26458 to 26458. [2022-11-25 22:28:06,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26458 states, 26457 states have (on average 1.1859999244056394) internal successors, (31378), 26457 states have internal predecessors, (31378), 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) [2022-11-25 22:28:06,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26458 states to 26458 states and 31378 transitions. [2022-11-25 22:28:06,726 INFO L78 Accepts]: Start accepts. Automaton has 26458 states and 31378 transitions. Word has length 280 [2022-11-25 22:28:06,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:06,727 INFO L495 AbstractCegarLoop]: Abstraction has 26458 states and 31378 transitions. [2022-11-25 22:28:06,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 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) [2022-11-25 22:28:06,727 INFO L276 IsEmpty]: Start isEmpty. Operand 26458 states and 31378 transitions. [2022-11-25 22:28:06,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-11-25 22:28:06,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:06,773 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:28:06,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 22:28:06,773 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:06,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:06,774 INFO L85 PathProgramCache]: Analyzing trace with hash 316256146, now seen corresponding path program 1 times [2022-11-25 22:28:06,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:06,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320788364] [2022-11-25 22:28:06,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:06,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 137 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:28:07,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:07,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320788364] [2022-11-25 22:28:07,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320788364] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:28:07,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350349567] [2022-11-25 22:28:07,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:07,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:07,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:07,614 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:07,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 22:28:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:07,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:28:07,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:28:07,968 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:28:07,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:28:07,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350349567] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:28:07,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:28:07,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-25 22:28:07,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205919845] [2022-11-25 22:28:07,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:28:07,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:28:07,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:07,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:28:07,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:28:07,972 INFO L87 Difference]: Start difference. First operand 26458 states and 31378 transitions. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 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) [2022-11-25 22:28:09,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:09,003 INFO L93 Difference]: Finished difference Result 56633 states and 67161 transitions. [2022-11-25 22:28:09,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:28:09,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 281 [2022-11-25 22:28:09,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:09,065 INFO L225 Difference]: With dead ends: 56633 [2022-11-25 22:28:09,066 INFO L226 Difference]: Without dead ends: 30462 [2022-11-25 22:28:09,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:28:09,086 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 127 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:09,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 203 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 22:28:09,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30462 states. [2022-11-25 22:28:09,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30462 to 30462. [2022-11-25 22:28:09,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30462 states, 30461 states have (on average 1.1746167230228817) internal successors, (35780), 30461 states have internal predecessors, (35780), 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) [2022-11-25 22:28:09,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30462 states to 30462 states and 35780 transitions. [2022-11-25 22:28:09,695 INFO L78 Accepts]: Start accepts. Automaton has 30462 states and 35780 transitions. Word has length 281 [2022-11-25 22:28:09,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:09,696 INFO L495 AbstractCegarLoop]: Abstraction has 30462 states and 35780 transitions. [2022-11-25 22:28:09,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 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) [2022-11-25 22:28:09,696 INFO L276 IsEmpty]: Start isEmpty. Operand 30462 states and 35780 transitions. [2022-11-25 22:28:09,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2022-11-25 22:28:09,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:09,809 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:28:09,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 22:28:10,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 22:28:10,017 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:10,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:10,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1335578823, now seen corresponding path program 1 times [2022-11-25 22:28:10,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:10,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468254672] [2022-11-25 22:28:10,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:10,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:10,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 102 proven. 6 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-25 22:28:10,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:10,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468254672] [2022-11-25 22:28:10,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468254672] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:28:10,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088766253] [2022-11-25 22:28:10,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:10,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:10,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:10,481 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:10,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 22:28:10,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:10,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:28:10,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:28:10,949 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-25 22:28:10,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:28:10,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088766253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:28:10,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:28:10,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-25 22:28:10,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428335283] [2022-11-25 22:28:10,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:28:10,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:28:10,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:10,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:28:10,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:28:10,953 INFO L87 Difference]: Start difference. First operand 30462 states and 35780 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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) [2022-11-25 22:28:11,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:11,877 INFO L93 Difference]: Finished difference Result 71505 states and 84051 transitions. [2022-11-25 22:28:11,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:28:11,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 282 [2022-11-25 22:28:11,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:11,944 INFO L225 Difference]: With dead ends: 71505 [2022-11-25 22:28:11,944 INFO L226 Difference]: Without dead ends: 41330 [2022-11-25 22:28:11,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:28:11,965 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 9 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:11,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 216 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 22:28:12,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41330 states. [2022-11-25 22:28:12,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41330 to 39614. [2022-11-25 22:28:12,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39614 states, 39613 states have (on average 1.1678994269557974) internal successors, (46264), 39613 states have internal predecessors, (46264), 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) [2022-11-25 22:28:12,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39614 states to 39614 states and 46264 transitions. [2022-11-25 22:28:12,751 INFO L78 Accepts]: Start accepts. Automaton has 39614 states and 46264 transitions. Word has length 282 [2022-11-25 22:28:12,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:12,752 INFO L495 AbstractCegarLoop]: Abstraction has 39614 states and 46264 transitions. [2022-11-25 22:28:12,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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) [2022-11-25 22:28:12,752 INFO L276 IsEmpty]: Start isEmpty. Operand 39614 states and 46264 transitions. [2022-11-25 22:28:12,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-11-25 22:28:12,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:12,791 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-25 22:28:12,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 22:28:12,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 22:28:12,998 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:12,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:12,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1720137523, now seen corresponding path program 1 times [2022-11-25 22:28:12,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:12,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845218995] [2022-11-25 22:28:12,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:12,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:13,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:13,409 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 68 proven. 6 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-25 22:28:13,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:13,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845218995] [2022-11-25 22:28:13,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845218995] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:28:13,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540861349] [2022-11-25 22:28:13,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:13,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:13,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:13,413 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:13,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 22:28:13,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:13,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 22:28:13,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:28:13,804 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-25 22:28:13,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:28:13,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540861349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:28:13,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:28:13,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-25 22:28:13,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534294911] [2022-11-25 22:28:13,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:28:13,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:28:13,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:13,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:28:13,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:28:13,809 INFO L87 Difference]: Start difference. First operand 39614 states and 46264 transitions. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 3 states have internal predecessors, (179), 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) [2022-11-25 22:28:15,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:15,342 INFO L93 Difference]: Finished difference Result 129851 states and 151382 transitions. [2022-11-25 22:28:15,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:28:15,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 302 [2022-11-25 22:28:15,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:15,449 INFO L225 Difference]: With dead ends: 129851 [2022-11-25 22:28:15,449 INFO L226 Difference]: Without dead ends: 90667 [2022-11-25 22:28:15,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:28:15,484 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 325 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:15,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 190 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 22:28:15,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90667 states. [2022-11-25 22:28:16,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90667 to 81799. [2022-11-25 22:28:17,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81799 states, 81798 states have (on average 1.1674124061713) internal successors, (95492), 81798 states have internal predecessors, (95492), 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) [2022-11-25 22:28:17,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81799 states to 81799 states and 95492 transitions. [2022-11-25 22:28:17,505 INFO L78 Accepts]: Start accepts. Automaton has 81799 states and 95492 transitions. Word has length 302 [2022-11-25 22:28:17,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:17,505 INFO L495 AbstractCegarLoop]: Abstraction has 81799 states and 95492 transitions. [2022-11-25 22:28:17,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 3 states have internal predecessors, (179), 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) [2022-11-25 22:28:17,505 INFO L276 IsEmpty]: Start isEmpty. Operand 81799 states and 95492 transitions. [2022-11-25 22:28:17,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-11-25 22:28:17,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:17,553 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-25 22:28:17,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-25 22:28:17,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 22:28:17,760 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:17,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:17,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1125999590, now seen corresponding path program 1 times [2022-11-25 22:28:17,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:17,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831393674] [2022-11-25 22:28:17,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:17,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:18,391 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-25 22:28:18,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:18,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831393674] [2022-11-25 22:28:18,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831393674] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:28:18,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533931070] [2022-11-25 22:28:18,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:18,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:18,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:18,394 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:18,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 22:28:18,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:18,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 22:28:18,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:28:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-25 22:28:18,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:28:18,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533931070] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:28:18,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:28:18,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-25 22:28:18,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565061806] [2022-11-25 22:28:18,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:28:18,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:28:18,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:18,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:28:18,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:28:18,816 INFO L87 Difference]: Start difference. First operand 81799 states and 95492 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 3 states have internal predecessors, (182), 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) [2022-11-25 22:28:20,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:20,903 INFO L93 Difference]: Finished difference Result 229665 states and 268885 transitions. [2022-11-25 22:28:20,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:28:20,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 305 [2022-11-25 22:28:20,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:21,302 INFO L225 Difference]: With dead ends: 229665 [2022-11-25 22:28:21,303 INFO L226 Difference]: Without dead ends: 148296 [2022-11-25 22:28:21,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:28:21,386 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 312 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:21,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 254 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 22:28:21,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148296 states. [2022-11-25 22:28:23,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148296 to 145434. [2022-11-25 22:28:24,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145434 states, 145433 states have (on average 1.1718248265524331) internal successors, (170422), 145433 states have internal predecessors, (170422), 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) [2022-11-25 22:28:24,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145434 states to 145434 states and 170422 transitions. [2022-11-25 22:28:24,269 INFO L78 Accepts]: Start accepts. Automaton has 145434 states and 170422 transitions. Word has length 305 [2022-11-25 22:28:24,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:24,269 INFO L495 AbstractCegarLoop]: Abstraction has 145434 states and 170422 transitions. [2022-11-25 22:28:24,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 3 states have internal predecessors, (182), 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) [2022-11-25 22:28:24,269 INFO L276 IsEmpty]: Start isEmpty. Operand 145434 states and 170422 transitions. [2022-11-25 22:28:24,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-11-25 22:28:24,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:24,345 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:28:24,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 22:28:24,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 22:28:24,551 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:24,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:24,552 INFO L85 PathProgramCache]: Analyzing trace with hash 908213967, now seen corresponding path program 1 times [2022-11-25 22:28:24,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:24,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521003240] [2022-11-25 22:28:24,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:24,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:25,132 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-11-25 22:28:25,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:25,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521003240] [2022-11-25 22:28:25,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521003240] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:28:25,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:28:25,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:28:25,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844155771] [2022-11-25 22:28:25,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:28:25,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:28:25,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:25,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:28:25,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:28:25,136 INFO L87 Difference]: Start difference. First operand 145434 states and 170422 transitions. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 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) [2022-11-25 22:28:27,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:27,917 INFO L93 Difference]: Finished difference Result 408844 states and 477176 transitions. [2022-11-25 22:28:27,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:28:27,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 339 [2022-11-25 22:28:27,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:28,605 INFO L225 Difference]: With dead ends: 408844 [2022-11-25 22:28:28,605 INFO L226 Difference]: Without dead ends: 263840 [2022-11-25 22:28:28,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:28:28,714 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 320 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:28,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 196 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 22:28:28,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263840 states. [2022-11-25 22:28:32,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263840 to 233808. [2022-11-25 22:28:32,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233808 states, 233807 states have (on average 1.1620310769138649) internal successors, (271691), 233807 states have internal predecessors, (271691), 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) [2022-11-25 22:28:33,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233808 states to 233808 states and 271691 transitions. [2022-11-25 22:28:33,725 INFO L78 Accepts]: Start accepts. Automaton has 233808 states and 271691 transitions. Word has length 339 [2022-11-25 22:28:33,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:33,726 INFO L495 AbstractCegarLoop]: Abstraction has 233808 states and 271691 transitions. [2022-11-25 22:28:33,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 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) [2022-11-25 22:28:33,726 INFO L276 IsEmpty]: Start isEmpty. Operand 233808 states and 271691 transitions. [2022-11-25 22:28:33,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-11-25 22:28:33,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:33,761 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-25 22:28:33,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-25 22:28:33,762 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:33,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:33,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1048870652, now seen corresponding path program 1 times [2022-11-25 22:28:33,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:33,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222454592] [2022-11-25 22:28:33,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:33,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:34,346 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 203 proven. 82 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:28:34,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:34,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222454592] [2022-11-25 22:28:34,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222454592] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:28:34,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469184053] [2022-11-25 22:28:34,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:34,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:34,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:34,349 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:34,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f581a0bf-b64f-47e3-9735-5caf569a2001/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 22:28:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:34,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:28:34,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:28:35,237 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 203 proven. 82 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:28:35,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:28:35,574 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 203 proven. 82 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:28:35,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469184053] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:28:35,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1761150524] [2022-11-25 22:28:35,619 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2022-11-25 22:28:35,619 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:28:35,629 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:28:35,635 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:28:35,636 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs