./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.09.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.09.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh --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 fd6b20844e2c749d2220243ee5decb4640d1db1a76545071f1578ab9a21c944c --- 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-2329fc7 [2022-12-14 12:47:57,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:47:57,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:47:57,043 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:47:57,043 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:47:57,044 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:47:57,045 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:47:57,047 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:47:57,049 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:47:57,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:47:57,050 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:47:57,052 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:47:57,052 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:47:57,053 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:47:57,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:47:57,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:47:57,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:47:57,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:47:57,058 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:47:57,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:47:57,060 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:47:57,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:47:57,061 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:47:57,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:47:57,064 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:47:57,064 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:47:57,065 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:47:57,065 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:47:57,065 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:47:57,066 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:47:57,066 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:47:57,067 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:47:57,067 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:47:57,068 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:47:57,069 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:47:57,069 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:47:57,069 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:47:57,069 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:47:57,069 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:47:57,070 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:47:57,071 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:47:57,071 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 12:47:57,086 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:47:57,087 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:47:57,087 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:47:57,087 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:47:57,087 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:47:57,088 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:47:57,088 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:47:57,088 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:47:57,088 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:47:57,088 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:47:57,088 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:47:57,088 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:47:57,088 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:47:57,089 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:47:57,089 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:47:57,089 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:47:57,089 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:47:57,089 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:47:57,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:47:57,090 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:47:57,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:47:57,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:47:57,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:47:57,090 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:47:57,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:47:57,090 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:47:57,090 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:47:57,090 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:47:57,091 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:47:57,091 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:47:57,091 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:47:57,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:47:57,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:47:57,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:47:57,091 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:47:57,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:47:57,092 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:47:57,092 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:47:57,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:47:57,092 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:47:57,092 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:47:57,092 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_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd6b20844e2c749d2220243ee5decb4640d1db1a76545071f1578ab9a21c944c [2022-12-14 12:47:57,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:47:57,272 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:47:57,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:47:57,275 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:47:57,275 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:47:57,276 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.09.cil-1.c [2022-12-14 12:47:59,960 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:48:00,362 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:48:00,363 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/sv-benchmarks/c/combinations/Problem05_label43+token_ring.09.cil-1.c [2022-12-14 12:48:00,397 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/data/f57d8eb38/f776010d259341f2b5a62ce2ab58f7ba/FLAG8137ad90c [2022-12-14 12:48:00,408 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/data/f57d8eb38/f776010d259341f2b5a62ce2ab58f7ba [2022-12-14 12:48:00,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:48:00,411 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:48:00,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:48:00,412 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:48:00,415 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:48:00,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:48:00" (1/1) ... [2022-12-14 12:48:00,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a083aff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:48:00, skipping insertion in model container [2022-12-14 12:48:00,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:48:00" (1/1) ... [2022-12-14 12:48:00,421 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:48:00,577 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:48:01,924 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_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/sv-benchmarks/c/combinations/Problem05_label43+token_ring.09.cil-1.c[381679,381692] [2022-12-14 12:48:01,943 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_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/sv-benchmarks/c/combinations/Problem05_label43+token_ring.09.cil-1.c[383339,383352] [2022-12-14 12:48:02,140 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:48:02,148 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:48:02,921 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_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/sv-benchmarks/c/combinations/Problem05_label43+token_ring.09.cil-1.c[381679,381692] [2022-12-14 12:48:02,923 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_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/sv-benchmarks/c/combinations/Problem05_label43+token_ring.09.cil-1.c[383339,383352] [2022-12-14 12:48:02,935 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:48:02,980 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:48:02,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:48:02 WrapperNode [2022-12-14 12:48:02,982 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:48:02,982 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:48:02,982 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:48:02,983 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:48:02,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:48:02" (1/1) ... [2022-12-14 12:48:03,045 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:48:02" (1/1) ... [2022-12-14 12:48:03,282 INFO L138 Inliner]: procedures = 62, calls = 68, calls flagged for inlining = 40, calls inlined = 40, statements flattened = 13025 [2022-12-14 12:48:03,282 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:48:03,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:48:03,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:48:03,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:48:03,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:48:02" (1/1) ... [2022-12-14 12:48:03,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:48:02" (1/1) ... [2022-12-14 12:48:03,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:48:02" (1/1) ... [2022-12-14 12:48:03,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:48:02" (1/1) ... [2022-12-14 12:48:03,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:48:02" (1/1) ... [2022-12-14 12:48:03,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:48:02" (1/1) ... [2022-12-14 12:48:03,576 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:48:02" (1/1) ... [2022-12-14 12:48:03,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:48:02" (1/1) ... [2022-12-14 12:48:03,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:48:03,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:48:03,638 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:48:03,638 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:48:03,638 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:48:02" (1/1) ... [2022-12-14 12:48:03,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:48:03,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:48:03,665 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:48:03,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:48:03,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:48:03,700 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 12:48:03,700 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 12:48:03,700 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 12:48:03,700 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 12:48:03,701 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 12:48:03,701 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 12:48:03,701 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 12:48:03,701 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 12:48:03,701 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 12:48:03,701 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 12:48:03,701 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 12:48:03,701 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 12:48:03,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:48:03,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:48:03,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:48:03,829 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:48:03,830 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:48:09,122 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:48:10,513 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:48:10,513 INFO L300 CfgBuilder]: Removed 13 assume(true) statements. [2022-12-14 12:48:10,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:48:10 BoogieIcfgContainer [2022-12-14 12:48:10,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:48:10,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:48:10,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:48:10,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:48:10,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:48:00" (1/3) ... [2022-12-14 12:48:10,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6371f567 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:48:10, skipping insertion in model container [2022-12-14 12:48:10,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:48:02" (2/3) ... [2022-12-14 12:48:10,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6371f567 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:48:10, skipping insertion in model container [2022-12-14 12:48:10,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:48:10" (3/3) ... [2022-12-14 12:48:10,524 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.09.cil-1.c [2022-12-14 12:48:10,539 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:48:10,539 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 12:48:10,610 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:48:10,615 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;@538cd5e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:48:10,615 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 12:48:10,624 INFO L276 IsEmpty]: Start isEmpty. Operand has 1798 states, 1766 states have (on average 1.962061155152888) internal successors, (3465), 1769 states have internal predecessors, (3465), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-12-14 12:48:10,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 12:48:10,634 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:48:10,634 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] [2022-12-14 12:48:10,635 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:48:10,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:48:10,639 INFO L85 PathProgramCache]: Analyzing trace with hash 65647437, now seen corresponding path program 1 times [2022-12-14 12:48:10,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:48:10,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621804058] [2022-12-14 12:48:10,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:48:10,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:48:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:48:10,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:48:10,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:48:10,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621804058] [2022-12-14 12:48:10,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621804058] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:48:10,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:48:10,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:48:10,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596874954] [2022-12-14 12:48:10,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:48:10,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:48:10,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:48:11,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:48:11,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:48:11,025 INFO L87 Difference]: Start difference. First operand has 1798 states, 1766 states have (on average 1.962061155152888) internal successors, (3465), 1769 states have internal predecessors, (3465), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 12:48:11,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:48:11,780 INFO L93 Difference]: Finished difference Result 3734 states and 7259 transitions. [2022-12-14 12:48:11,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:48:11,782 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 58 [2022-12-14 12:48:11,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:48:11,795 INFO L225 Difference]: With dead ends: 3734 [2022-12-14 12:48:11,795 INFO L226 Difference]: Without dead ends: 1935 [2022-12-14 12:48:11,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:48:11,803 INFO L413 NwaCegarLoop]: 3421 mSDtfsCounter, 3680 mSDsluCounter, 3335 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3680 SdHoareTripleChecker+Valid, 6756 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:48:11,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3680 Valid, 6756 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 12:48:11,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2022-12-14 12:48:11,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 1934. [2022-12-14 12:48:11,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1934 states, 1878 states have (on average 1.9297124600638977) internal successors, (3624), 1881 states have internal predecessors, (3624), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-12-14 12:48:11,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 3708 transitions. [2022-12-14 12:48:11,885 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 3708 transitions. Word has length 58 [2022-12-14 12:48:11,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:48:11,886 INFO L495 AbstractCegarLoop]: Abstraction has 1934 states and 3708 transitions. [2022-12-14 12:48:11,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 12:48:11,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 3708 transitions. [2022-12-14 12:48:11,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 12:48:11,890 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:48:11,890 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:48:11,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 12:48:11,890 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:48:11,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:48:11,891 INFO L85 PathProgramCache]: Analyzing trace with hash -753705434, now seen corresponding path program 1 times [2022-12-14 12:48:11,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:48:11,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282909914] [2022-12-14 12:48:11,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:48:11,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:48:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:48:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:48:12,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:48:12,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282909914] [2022-12-14 12:48:12,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282909914] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:48:12,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580923538] [2022-12-14 12:48:12,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:48:12,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:48:12,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:48:12,029 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:48:12,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:48:12,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:48:12,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:48:12,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:48:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:48:12,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:48:12,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580923538] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:48:12,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:48:12,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:48:12,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794690995] [2022-12-14 12:48:12,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:48:12,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:48:12,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:48:12,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:48:12,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:48:12,287 INFO L87 Difference]: Start difference. First operand 1934 states and 3708 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:48:12,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:48:12,720 INFO L93 Difference]: Finished difference Result 2503 states and 4585 transitions. [2022-12-14 12:48:12,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:48:12,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2022-12-14 12:48:12,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:48:12,729 INFO L225 Difference]: With dead ends: 2503 [2022-12-14 12:48:12,729 INFO L226 Difference]: Without dead ends: 2215 [2022-12-14 12:48:12,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:48:12,732 INFO L413 NwaCegarLoop]: 3292 mSDtfsCounter, 3453 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3453 SdHoareTripleChecker+Valid, 3472 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:48:12,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3453 Valid, 3472 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:48:12,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2022-12-14 12:48:12,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2211. [2022-12-14 12:48:12,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 2107 states have (on average 1.8818224964404366) internal successors, (3965), 2111 states have internal predecessors, (3965), 78 states have call successors, (78), 24 states have call predecessors, (78), 24 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2022-12-14 12:48:12,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 4121 transitions. [2022-12-14 12:48:12,797 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 4121 transitions. Word has length 115 [2022-12-14 12:48:12,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:48:12,797 INFO L495 AbstractCegarLoop]: Abstraction has 2211 states and 4121 transitions. [2022-12-14 12:48:12,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:48:12,798 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 4121 transitions. [2022-12-14 12:48:12,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 12:48:12,801 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:48:12,801 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:48:12,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:48:13,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 12:48:13,002 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:48:13,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:48:13,003 INFO L85 PathProgramCache]: Analyzing trace with hash 727273384, now seen corresponding path program 1 times [2022-12-14 12:48:13,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:48:13,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608148550] [2022-12-14 12:48:13,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:48:13,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:48:13,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:48:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:48:13,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:48:13,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608148550] [2022-12-14 12:48:13,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608148550] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:48:13,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885605909] [2022-12-14 12:48:13,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:48:13,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:48:13,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:48:13,139 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:48:13,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 12:48:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:48:13,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:48:13,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:48:13,357 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 12:48:13,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:48:13,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885605909] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:48:13,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:48:13,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:48:13,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220100150] [2022-12-14 12:48:13,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:48:13,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:48:13,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:48:13,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:48:13,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:48:13,360 INFO L87 Difference]: Start difference. First operand 2211 states and 4121 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:48:13,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:48:13,779 INFO L93 Difference]: Finished difference Result 3328 states and 5836 transitions. [2022-12-14 12:48:13,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:48:13,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2022-12-14 12:48:13,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:48:13,790 INFO L225 Difference]: With dead ends: 3328 [2022-12-14 12:48:13,790 INFO L226 Difference]: Without dead ends: 2763 [2022-12-14 12:48:13,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:48:13,793 INFO L413 NwaCegarLoop]: 3291 mSDtfsCounter, 3465 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3465 SdHoareTripleChecker+Valid, 3471 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:48:13,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3465 Valid, 3471 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:48:13,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2022-12-14 12:48:13,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 2757. [2022-12-14 12:48:13,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2757 states, 2559 states have (on average 1.8112543962485346) internal successors, (4635), 2565 states have internal predecessors, (4635), 148 states have call successors, (148), 48 states have call predecessors, (148), 48 states have return successors, (148), 144 states have call predecessors, (148), 148 states have call successors, (148) [2022-12-14 12:48:13,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 4931 transitions. [2022-12-14 12:48:13,857 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 4931 transitions. Word has length 115 [2022-12-14 12:48:13,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:48:13,857 INFO L495 AbstractCegarLoop]: Abstraction has 2757 states and 4931 transitions. [2022-12-14 12:48:13,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:48:13,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 4931 transitions. [2022-12-14 12:48:13,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 12:48:13,860 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:48:13,860 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:48:13,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 12:48:14,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:48:14,062 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:48:14,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:48:14,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1144582614, now seen corresponding path program 1 times [2022-12-14 12:48:14,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:48:14,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711448246] [2022-12-14 12:48:14,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:48:14,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:48:14,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:48:14,304 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:48:14,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:48:14,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711448246] [2022-12-14 12:48:14,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711448246] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:48:14,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990011917] [2022-12-14 12:48:14,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:48:14,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:48:14,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:48:14,306 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:48:14,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 12:48:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:48:14,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:48:14,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:48:14,472 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 12:48:14,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:48:14,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990011917] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:48:14,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:48:14,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:48:14,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847126732] [2022-12-14 12:48:14,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:48:14,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:48:14,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:48:14,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:48:14,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:48:14,475 INFO L87 Difference]: Start difference. First operand 2757 states and 4931 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:48:14,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:48:14,852 INFO L93 Difference]: Finished difference Result 4954 states and 8288 transitions. [2022-12-14 12:48:14,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:48:14,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2022-12-14 12:48:14,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:48:14,863 INFO L225 Difference]: With dead ends: 4954 [2022-12-14 12:48:14,864 INFO L226 Difference]: Without dead ends: 3843 [2022-12-14 12:48:14,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:48:14,868 INFO L413 NwaCegarLoop]: 3290 mSDtfsCounter, 3474 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3474 SdHoareTripleChecker+Valid, 3470 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:48:14,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3474 Valid, 3470 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:48:14,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3843 states. [2022-12-14 12:48:14,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3843 to 3833. [2022-12-14 12:48:14,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3451 states have (on average 1.724427702115329) internal successors, (5951), 3461 states have internal predecessors, (5951), 284 states have call successors, (284), 96 states have call predecessors, (284), 96 states have return successors, (284), 276 states have call predecessors, (284), 284 states have call successors, (284) [2022-12-14 12:48:14,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 6519 transitions. [2022-12-14 12:48:14,976 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 6519 transitions. Word has length 115 [2022-12-14 12:48:14,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:48:14,977 INFO L495 AbstractCegarLoop]: Abstraction has 3833 states and 6519 transitions. [2022-12-14 12:48:14,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:48:14,977 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 6519 transitions. [2022-12-14 12:48:14,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 12:48:14,980 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:48:14,980 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:48:14,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 12:48:15,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:48:15,181 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:48:15,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:48:15,181 INFO L85 PathProgramCache]: Analyzing trace with hash -449150488, now seen corresponding path program 1 times [2022-12-14 12:48:15,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:48:15,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6301015] [2022-12-14 12:48:15,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:48:15,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:48:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:48:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:48:15,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:48:15,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6301015] [2022-12-14 12:48:15,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6301015] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:48:15,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469798658] [2022-12-14 12:48:15,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:48:15,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:48:15,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:48:15,275 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:48:15,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 12:48:15,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:48:15,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:48:15,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:48:15,450 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 12:48:15,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:48:15,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469798658] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:48:15,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:48:15,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:48:15,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920047550] [2022-12-14 12:48:15,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:48:15,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:48:15,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:48:15,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:48:15,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:48:15,452 INFO L87 Difference]: Start difference. First operand 3833 states and 6519 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:48:15,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:48:15,903 INFO L93 Difference]: Finished difference Result 8158 states and 13092 transitions. [2022-12-14 12:48:15,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:48:15,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2022-12-14 12:48:15,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:48:15,922 INFO L225 Difference]: With dead ends: 8158 [2022-12-14 12:48:15,922 INFO L226 Difference]: Without dead ends: 5971 [2022-12-14 12:48:15,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:48:15,930 INFO L413 NwaCegarLoop]: 3262 mSDtfsCounter, 3471 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3471 SdHoareTripleChecker+Valid, 3442 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:48:15,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3471 Valid, 3442 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:48:15,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5971 states. [2022-12-14 12:48:16,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5971 to 5953. [2022-12-14 12:48:16,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5953 states, 5211 states have (on average 1.637881404720783) internal successors, (8535), 5229 states have internal predecessors, (8535), 548 states have call successors, (548), 192 states have call predecessors, (548), 192 states have return successors, (548), 532 states have call predecessors, (548), 548 states have call successors, (548) [2022-12-14 12:48:16,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5953 states to 5953 states and 9631 transitions. [2022-12-14 12:48:16,068 INFO L78 Accepts]: Start accepts. Automaton has 5953 states and 9631 transitions. Word has length 115 [2022-12-14 12:48:16,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:48:16,068 INFO L495 AbstractCegarLoop]: Abstraction has 5953 states and 9631 transitions. [2022-12-14 12:48:16,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:48:16,069 INFO L276 IsEmpty]: Start isEmpty. Operand 5953 states and 9631 transitions. [2022-12-14 12:48:16,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 12:48:16,074 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:48:16,074 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:48:16,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 12:48:16,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:48:16,275 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:48:16,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:48:16,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1825298154, now seen corresponding path program 1 times [2022-12-14 12:48:16,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:48:16,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541716434] [2022-12-14 12:48:16,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:48:16,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:48:16,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:48:16,415 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:48:16,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:48:16,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541716434] [2022-12-14 12:48:16,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541716434] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:48:16,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130529788] [2022-12-14 12:48:16,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:48:16,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:48:16,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:48:16,416 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:48:16,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 12:48:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:48:16,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:48:16,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:48:16,618 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 12:48:16,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:48:16,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130529788] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:48:16,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:48:16,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:48:16,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681619782] [2022-12-14 12:48:16,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:48:16,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:48:16,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:48:16,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:48:16,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:48:16,620 INFO L87 Difference]: Start difference. First operand 5953 states and 9631 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:48:17,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:48:17,030 INFO L93 Difference]: Finished difference Result 14470 states and 22500 transitions. [2022-12-14 12:48:17,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:48:17,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2022-12-14 12:48:17,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:48:17,065 INFO L225 Difference]: With dead ends: 14470 [2022-12-14 12:48:17,065 INFO L226 Difference]: Without dead ends: 10163 [2022-12-14 12:48:17,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:48:17,078 INFO L413 NwaCegarLoop]: 3262 mSDtfsCounter, 3459 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3459 SdHoareTripleChecker+Valid, 3442 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:48:17,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3459 Valid, 3442 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:48:17,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10163 states. [2022-12-14 12:48:17,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10163 to 10129. [2022-12-14 12:48:17,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10129 states, 8683 states have (on average 1.5670851088333526) internal successors, (13607), 8717 states have internal predecessors, (13607), 1060 states have call successors, (1060), 384 states have call predecessors, (1060), 384 states have return successors, (1060), 1028 states have call predecessors, (1060), 1060 states have call successors, (1060) [2022-12-14 12:48:17,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10129 states to 10129 states and 15727 transitions. [2022-12-14 12:48:17,365 INFO L78 Accepts]: Start accepts. Automaton has 10129 states and 15727 transitions. Word has length 115 [2022-12-14 12:48:17,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:48:17,366 INFO L495 AbstractCegarLoop]: Abstraction has 10129 states and 15727 transitions. [2022-12-14 12:48:17,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:48:17,366 INFO L276 IsEmpty]: Start isEmpty. Operand 10129 states and 15727 transitions. [2022-12-14 12:48:17,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 12:48:17,381 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:48:17,381 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:48:17,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 12:48:17,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:48:17,582 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:48:17,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:48:17,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1476599532, now seen corresponding path program 1 times [2022-12-14 12:48:17,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:48:17,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261043571] [2022-12-14 12:48:17,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:48:17,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:48:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:48:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 12:48:17,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:48:17,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261043571] [2022-12-14 12:48:17,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261043571] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:48:17,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:48:17,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:48:17,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275818322] [2022-12-14 12:48:17,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:48:17,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:48:17,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:48:17,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:48:17,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:48:17,675 INFO L87 Difference]: Start difference. First operand 10129 states and 15727 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 12:48:18,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:48:18,221 INFO L93 Difference]: Finished difference Result 16723 states and 25776 transitions. [2022-12-14 12:48:18,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:48:18,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 115 [2022-12-14 12:48:18,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:48:18,261 INFO L225 Difference]: With dead ends: 16723 [2022-12-14 12:48:18,261 INFO L226 Difference]: Without dead ends: 12401 [2022-12-14 12:48:18,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:48:18,272 INFO L413 NwaCegarLoop]: 3348 mSDtfsCounter, 100 mSDsluCounter, 3254 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 6602 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:48:18,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 6602 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:48:18,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12401 states. [2022-12-14 12:48:18,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12401 to 11713. [2022-12-14 12:48:18,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11713 states, 10203 states have (on average 1.5908066255023032) internal successors, (16231), 10237 states have internal predecessors, (16231), 1092 states have call successors, (1092), 416 states have call predecessors, (1092), 416 states have return successors, (1092), 1060 states have call predecessors, (1092), 1092 states have call successors, (1092) [2022-12-14 12:48:18,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11713 states to 11713 states and 18415 transitions. [2022-12-14 12:48:18,671 INFO L78 Accepts]: Start accepts. Automaton has 11713 states and 18415 transitions. Word has length 115 [2022-12-14 12:48:18,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:48:18,671 INFO L495 AbstractCegarLoop]: Abstraction has 11713 states and 18415 transitions. [2022-12-14 12:48:18,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 12:48:18,672 INFO L276 IsEmpty]: Start isEmpty. Operand 11713 states and 18415 transitions. [2022-12-14 12:48:18,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 12:48:18,687 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:48:18,687 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:48:18,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 12:48:18,687 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:48:18,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:48:18,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1920271580, now seen corresponding path program 1 times [2022-12-14 12:48:18,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:48:18,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392906823] [2022-12-14 12:48:18,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:48:18,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:48:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:48:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 12:48:18,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:48:18,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392906823] [2022-12-14 12:48:18,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392906823] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:48:18,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:48:18,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:48:18,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165226656] [2022-12-14 12:48:18,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:48:18,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:48:18,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:48:18,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:48:18,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:48:18,749 INFO L87 Difference]: Start difference. First operand 11713 states and 18415 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:48:19,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:48:19,428 INFO L93 Difference]: Finished difference Result 31558 states and 48788 transitions. [2022-12-14 12:48:19,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:48:19,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2022-12-14 12:48:19,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:48:19,472 INFO L225 Difference]: With dead ends: 31558 [2022-12-14 12:48:19,472 INFO L226 Difference]: Without dead ends: 21491 [2022-12-14 12:48:19,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:48:19,490 INFO L413 NwaCegarLoop]: 3264 mSDtfsCounter, 3461 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3461 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:48:19,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3461 Valid, 3444 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:48:19,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21491 states. [2022-12-14 12:48:19,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21491 to 21393. [2022-12-14 12:48:19,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21393 states, 18443 states have (on average 1.5480670172965352) internal successors, (28551), 18509 states have internal predecessors, (28551), 2116 states have call successors, (2116), 832 states have call predecessors, (2116), 832 states have return successors, (2116), 2052 states have call predecessors, (2116), 2116 states have call successors, (2116) [2022-12-14 12:48:20,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21393 states to 21393 states and 32783 transitions. [2022-12-14 12:48:20,037 INFO L78 Accepts]: Start accepts. Automaton has 21393 states and 32783 transitions. Word has length 156 [2022-12-14 12:48:20,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:48:20,037 INFO L495 AbstractCegarLoop]: Abstraction has 21393 states and 32783 transitions. [2022-12-14 12:48:20,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:48:20,037 INFO L276 IsEmpty]: Start isEmpty. Operand 21393 states and 32783 transitions. [2022-12-14 12:48:20,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 12:48:20,061 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:48:20,061 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:48:20,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 12:48:20,062 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:48:20,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:48:20,062 INFO L85 PathProgramCache]: Analyzing trace with hash 323708882, now seen corresponding path program 1 times [2022-12-14 12:48:20,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:48:20,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855553367] [2022-12-14 12:48:20,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:48:20,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:48:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:48:20,117 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 12:48:20,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:48:20,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855553367] [2022-12-14 12:48:20,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855553367] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:48:20,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:48:20,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:48:20,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331233652] [2022-12-14 12:48:20,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:48:20,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:48:20,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:48:20,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:48:20,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:48:20,120 INFO L87 Difference]: Start difference. First operand 21393 states and 32783 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:48:21,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:48:21,410 INFO L93 Difference]: Finished difference Result 60310 states and 91924 transitions. [2022-12-14 12:48:21,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:48:21,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2022-12-14 12:48:21,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:48:21,498 INFO L225 Difference]: With dead ends: 60310 [2022-12-14 12:48:21,498 INFO L226 Difference]: Without dead ends: 40563 [2022-12-14 12:48:21,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:48:21,538 INFO L413 NwaCegarLoop]: 3264 mSDtfsCounter, 3463 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3463 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:48:21,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3463 Valid, 3444 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:48:21,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40563 states. [2022-12-14 12:48:22,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40563 to 40369. [2022-12-14 12:48:22,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40369 states, 34603 states have (on average 1.5186833511545241) internal successors, (52551), 34733 states have internal predecessors, (52551), 4100 states have call successors, (4100), 1664 states have call predecessors, (4100), 1664 states have return successors, (4100), 3972 states have call predecessors, (4100), 4100 states have call successors, (4100) [2022-12-14 12:48:22,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40369 states to 40369 states and 60751 transitions. [2022-12-14 12:48:22,570 INFO L78 Accepts]: Start accepts. Automaton has 40369 states and 60751 transitions. Word has length 156 [2022-12-14 12:48:22,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:48:22,570 INFO L495 AbstractCegarLoop]: Abstraction has 40369 states and 60751 transitions. [2022-12-14 12:48:22,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:48:22,571 INFO L276 IsEmpty]: Start isEmpty. Operand 40369 states and 60751 transitions. [2022-12-14 12:48:22,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 12:48:22,620 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:48:22,620 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:48:22,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 12:48:22,620 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:48:22,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:48:22,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1573996287, now seen corresponding path program 1 times [2022-12-14 12:48:22,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:48:22,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098845973] [2022-12-14 12:48:22,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:48:22,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:48:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:48:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 12:48:22,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:48:22,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098845973] [2022-12-14 12:48:22,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098845973] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:48:22,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:48:22,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:48:22,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544681167] [2022-12-14 12:48:22,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:48:22,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:48:22,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:48:22,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:48:22,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:48:22,676 INFO L87 Difference]: Start difference. First operand 40369 states and 60751 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:48:24,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:48:24,805 INFO L93 Difference]: Finished difference Result 116662 states and 175828 transitions. [2022-12-14 12:48:24,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:48:24,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2022-12-14 12:48:24,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:48:24,962 INFO L225 Difference]: With dead ends: 116662 [2022-12-14 12:48:24,962 INFO L226 Difference]: Without dead ends: 77939 [2022-12-14 12:48:25,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:48:25,030 INFO L413 NwaCegarLoop]: 3264 mSDtfsCounter, 3465 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3465 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:48:25,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3465 Valid, 3444 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:48:25,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77939 states. [2022-12-14 12:48:27,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77939 to 77553. [2022-12-14 12:48:27,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77553 states, 66283 states have (on average 1.4976841724122325) internal successors, (99271), 66541 states have internal predecessors, (99271), 7940 states have call successors, (7940), 3328 states have call predecessors, (7940), 3328 states have return successors, (7940), 7684 states have call predecessors, (7940), 7940 states have call successors, (7940) [2022-12-14 12:48:27,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77553 states to 77553 states and 115151 transitions. [2022-12-14 12:48:27,689 INFO L78 Accepts]: Start accepts. Automaton has 77553 states and 115151 transitions. Word has length 156 [2022-12-14 12:48:27,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:48:27,689 INFO L495 AbstractCegarLoop]: Abstraction has 77553 states and 115151 transitions. [2022-12-14 12:48:27,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:48:27,689 INFO L276 IsEmpty]: Start isEmpty. Operand 77553 states and 115151 transitions. [2022-12-14 12:48:27,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 12:48:27,800 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:48:27,800 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:48:27,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 12:48:27,800 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:48:27,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:48:27,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1706909159, now seen corresponding path program 1 times [2022-12-14 12:48:27,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:48:27,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144563426] [2022-12-14 12:48:27,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:48:27,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:48:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:48:27,854 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 12:48:27,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:48:27,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144563426] [2022-12-14 12:48:27,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144563426] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:48:27,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:48:27,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:48:27,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004119465] [2022-12-14 12:48:27,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:48:27,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:48:27,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:48:27,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:48:27,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:48:27,856 INFO L87 Difference]: Start difference. First operand 77553 states and 115151 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:48:32,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:48:32,008 INFO L93 Difference]: Finished difference Result 227062 states and 338900 transitions. [2022-12-14 12:48:32,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:48:32,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2022-12-14 12:48:32,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:48:32,459 INFO L225 Difference]: With dead ends: 227062 [2022-12-14 12:48:32,459 INFO L226 Difference]: Without dead ends: 151155 [2022-12-14 12:48:32,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:48:32,633 INFO L413 NwaCegarLoop]: 3272 mSDtfsCounter, 3468 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3468 SdHoareTripleChecker+Valid, 3452 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:48:32,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3468 Valid, 3452 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:48:32,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151155 states. [2022-12-14 12:48:38,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151155 to 150385. [2022-12-14 12:48:38,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150385 states, 128363 states have (on average 1.4813536611017193) internal successors, (190151), 128877 states have internal predecessors, (190151), 15364 states have call successors, (15364), 6656 states have call predecessors, (15364), 6656 states have return successors, (15364), 14852 states have call predecessors, (15364), 15364 states have call successors, (15364) [2022-12-14 12:48:38,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150385 states to 150385 states and 220879 transitions. [2022-12-14 12:48:38,836 INFO L78 Accepts]: Start accepts. Automaton has 150385 states and 220879 transitions. Word has length 156 [2022-12-14 12:48:38,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:48:38,837 INFO L495 AbstractCegarLoop]: Abstraction has 150385 states and 220879 transitions. [2022-12-14 12:48:38,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:48:38,837 INFO L276 IsEmpty]: Start isEmpty. Operand 150385 states and 220879 transitions. [2022-12-14 12:48:39,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-12-14 12:48:39,201 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:48:39,201 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, 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] [2022-12-14 12:48:39,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 12:48:39,202 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:48:39,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:48:39,202 INFO L85 PathProgramCache]: Analyzing trace with hash -754884317, now seen corresponding path program 1 times [2022-12-14 12:48:39,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:48:39,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850480967] [2022-12-14 12:48:39,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:48:39,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:48:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:48:39,659 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 15 proven. 63 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-12-14 12:48:39,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:48:39,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850480967] [2022-12-14 12:48:39,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850480967] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:48:39,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520038431] [2022-12-14 12:48:39,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:48:39,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:48:39,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:48:39,660 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:48:39,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 12:48:39,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:48:39,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:48:39,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:48:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:48:39,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:48:39,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520038431] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:48:39,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:48:39,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 12:48:39,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145937912] [2022-12-14 12:48:39,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:48:39,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:48:39,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:48:39,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:48:39,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:48:39,855 INFO L87 Difference]: Start difference. First operand 150385 states and 220879 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 12:48:45,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:48:45,766 INFO L93 Difference]: Finished difference Result 286581 states and 424401 transitions. [2022-12-14 12:48:45,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:48:45,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 178 [2022-12-14 12:48:45,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:48:46,328 INFO L225 Difference]: With dead ends: 286581 [2022-12-14 12:48:46,328 INFO L226 Difference]: Without dead ends: 211059 [2022-12-14 12:48:46,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:48:46,454 INFO L413 NwaCegarLoop]: 3392 mSDtfsCounter, 152 mSDsluCounter, 3256 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 6648 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:48:46,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 6648 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:48:46,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211059 states. [2022-12-14 12:48:52,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211059 to 183153. [2022-12-14 12:48:52,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183153 states, 159595 states have (on average 1.523500109652558) internal successors, (243143), 160109 states have internal predecessors, (243143), 16132 states have call successors, (16132), 7424 states have call predecessors, (16132), 7424 states have return successors, (16132), 15620 states have call predecessors, (16132), 16132 states have call successors, (16132) [2022-12-14 12:48:52,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183153 states to 183153 states and 275407 transitions. [2022-12-14 12:48:52,981 INFO L78 Accepts]: Start accepts. Automaton has 183153 states and 275407 transitions. Word has length 178 [2022-12-14 12:48:52,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:48:52,981 INFO L495 AbstractCegarLoop]: Abstraction has 183153 states and 275407 transitions. [2022-12-14 12:48:52,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 12:48:52,981 INFO L276 IsEmpty]: Start isEmpty. Operand 183153 states and 275407 transitions. [2022-12-14 12:48:53,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-12-14 12:48:53,278 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:48:53,278 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, 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] [2022-12-14 12:48:53,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 12:48:53,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 12:48:53,480 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:48:53,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:48:53,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1223754274, now seen corresponding path program 2 times [2022-12-14 12:48:53,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:48:53,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863366918] [2022-12-14 12:48:53,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:48:53,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:48:53,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:48:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 12:48:53,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:48:53,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863366918] [2022-12-14 12:48:53,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863366918] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:48:53,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987231810] [2022-12-14 12:48:53,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:48:53,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:48:53,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:48:53,687 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:48:53,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 12:48:53,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 12:48:53,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:48:53,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:48:53,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:48:53,837 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 12:48:53,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:48:53,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987231810] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:48:53,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:48:53,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 12:48:53,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713605746] [2022-12-14 12:48:53,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:48:53,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:48:53,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:48:53,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:48:53,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:48:53,839 INFO L87 Difference]: Start difference. First operand 183153 states and 275407 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 12:48:59,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:48:59,595 INFO L93 Difference]: Finished difference Result 276341 states and 420433 transitions. [2022-12-14 12:48:59,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:48:59,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 178 [2022-12-14 12:48:59,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:49:00,079 INFO L225 Difference]: With dead ends: 276341 [2022-12-14 12:49:00,079 INFO L226 Difference]: Without dead ends: 183667 [2022-12-14 12:49:00,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:49:00,272 INFO L413 NwaCegarLoop]: 3411 mSDtfsCounter, 200 mSDsluCounter, 3238 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 6649 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:49:00,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 6649 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:49:00,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183667 states. [2022-12-14 12:49:05,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183667 to 181873. [2022-12-14 12:49:05,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181873 states, 158315 states have (on average 1.5099453620945582) internal successors, (239047), 158829 states have internal predecessors, (239047), 16132 states have call successors, (16132), 7424 states have call predecessors, (16132), 7424 states have return successors, (16132), 15620 states have call predecessors, (16132), 16132 states have call successors, (16132) [2022-12-14 12:49:06,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181873 states to 181873 states and 271311 transitions. [2022-12-14 12:49:06,373 INFO L78 Accepts]: Start accepts. Automaton has 181873 states and 271311 transitions. Word has length 178 [2022-12-14 12:49:06,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:49:06,373 INFO L495 AbstractCegarLoop]: Abstraction has 181873 states and 271311 transitions. [2022-12-14 12:49:06,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 12:49:06,374 INFO L276 IsEmpty]: Start isEmpty. Operand 181873 states and 271311 transitions. [2022-12-14 12:49:06,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-12-14 12:49:06,696 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:49:06,696 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, 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] [2022-12-14 12:49:06,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 12:49:06,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 12:49:06,897 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:49:06,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:49:06,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1796110333, now seen corresponding path program 1 times [2022-12-14 12:49:06,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:49:06,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953795814] [2022-12-14 12:49:06,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:49:06,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:49:06,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:49:07,136 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 10 proven. 60 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 12:49:07,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:49:07,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953795814] [2022-12-14 12:49:07,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953795814] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:49:07,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496879175] [2022-12-14 12:49:07,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:49:07,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:49:07,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:49:07,138 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:49:07,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 12:49:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:49:07,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:49:07,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:49:07,350 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 12:49:07,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:49:07,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496879175] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:49:07,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:49:07,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 12:49:07,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789464060] [2022-12-14 12:49:07,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:49:07,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:49:07,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:49:07,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:49:07,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:49:07,353 INFO L87 Difference]: Start difference. First operand 181873 states and 271311 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 12:49:13,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:49:13,758 INFO L93 Difference]: Finished difference Result 313581 states and 459722 transitions. [2022-12-14 12:49:13,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:49:13,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 178 [2022-12-14 12:49:13,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:49:14,434 INFO L225 Difference]: With dead ends: 313581 [2022-12-14 12:49:14,434 INFO L226 Difference]: Without dead ends: 222827 [2022-12-14 12:49:14,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:49:14,614 INFO L413 NwaCegarLoop]: 3275 mSDtfsCounter, 3466 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3466 SdHoareTripleChecker+Valid, 3329 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:49:14,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3466 Valid, 3329 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:49:14,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222827 states. [2022-12-14 12:49:21,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222827 to 222827. [2022-12-14 12:49:21,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222827 states, 196201 states have (on average 1.4558386552565992) internal successors, (285637), 196715 states have internal predecessors, (285637), 17154 states have call successors, (17154), 9470 states have call predecessors, (17154), 9470 states have return successors, (17154), 16642 states have call predecessors, (17154), 17154 states have call successors, (17154) [2022-12-14 12:49:22,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222827 states to 222827 states and 319945 transitions. [2022-12-14 12:49:22,571 INFO L78 Accepts]: Start accepts. Automaton has 222827 states and 319945 transitions. Word has length 178 [2022-12-14 12:49:22,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:49:22,572 INFO L495 AbstractCegarLoop]: Abstraction has 222827 states and 319945 transitions. [2022-12-14 12:49:22,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 12:49:22,572 INFO L276 IsEmpty]: Start isEmpty. Operand 222827 states and 319945 transitions. [2022-12-14 12:49:23,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-12-14 12:49:23,074 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:49:23,074 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, 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] [2022-12-14 12:49:23,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 12:49:23,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 12:49:23,275 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:49:23,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:49:23,275 INFO L85 PathProgramCache]: Analyzing trace with hash -644925397, now seen corresponding path program 1 times [2022-12-14 12:49:23,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:49:23,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991577480] [2022-12-14 12:49:23,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:49:23,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:49:23,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:49:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 10 proven. 59 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 12:49:23,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:49:23,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991577480] [2022-12-14 12:49:23,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991577480] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:49:23,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889645065] [2022-12-14 12:49:23,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:49:23,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:49:23,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:49:23,517 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:49:23,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 12:49:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:49:23,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:49:23,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:49:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 12:49:23,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:49:23,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889645065] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:49:23,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:49:23,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 12:49:23,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635688017] [2022-12-14 12:49:23,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:49:23,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:49:23,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:49:23,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:49:23,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:49:23,725 INFO L87 Difference]: Start difference. First operand 222827 states and 319945 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 12:49:34,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:49:34,629 INFO L93 Difference]: Finished difference Result 531045 states and 775872 transitions. [2022-12-14 12:49:34,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:49:34,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 178 [2022-12-14 12:49:34,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:49:35,685 INFO L225 Difference]: With dead ends: 531045 [2022-12-14 12:49:35,685 INFO L226 Difference]: Without dead ends: 309865 [2022-12-14 12:49:36,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:49:36,090 INFO L413 NwaCegarLoop]: 3273 mSDtfsCounter, 100 mSDsluCounter, 3246 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 6519 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:49:36,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 6519 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:49:36,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309865 states. [2022-12-14 12:49:45,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309865 to 256115. [2022-12-14 12:49:45,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256115 states, 227949 states have (on average 1.4878108699753014) internal successors, (339145), 228464 states have internal predecessors, (339145), 17924 states have call successors, (17924), 10240 states have call predecessors, (17924), 10240 states have return successors, (17924), 17411 states have call predecessors, (17924), 17924 states have call successors, (17924) [2022-12-14 12:49:46,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256115 states to 256115 states and 374993 transitions. [2022-12-14 12:49:46,182 INFO L78 Accepts]: Start accepts. Automaton has 256115 states and 374993 transitions. Word has length 178 [2022-12-14 12:49:46,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:49:46,182 INFO L495 AbstractCegarLoop]: Abstraction has 256115 states and 374993 transitions. [2022-12-14 12:49:46,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 12:49:46,182 INFO L276 IsEmpty]: Start isEmpty. Operand 256115 states and 374993 transitions. [2022-12-14 12:49:46,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-12-14 12:49:46,749 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:49:46,749 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, 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] [2022-12-14 12:49:46,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 12:49:46,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:49:46,951 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:49:46,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:49:46,952 INFO L85 PathProgramCache]: Analyzing trace with hash 652747954, now seen corresponding path program 1 times [2022-12-14 12:49:46,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:49:46,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239386202] [2022-12-14 12:49:46,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:49:46,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:49:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:49:47,239 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 13 proven. 59 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 12:49:47,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:49:47,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239386202] [2022-12-14 12:49:47,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239386202] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:49:47,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715602337] [2022-12-14 12:49:47,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:49:47,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:49:47,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:49:47,241 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:49:47,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 12:49:47,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:49:47,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 1091 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:49:47,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:49:47,458 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 12:49:47,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:49:47,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715602337] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:49:47,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:49:47,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 12:49:47,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784925440] [2022-12-14 12:49:47,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:49:47,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:49:47,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:49:47,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:49:47,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:49:47,460 INFO L87 Difference]: Start difference. First operand 256115 states and 374993 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 12:50:05,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:50:05,298 INFO L93 Difference]: Finished difference Result 782457 states and 1140945 transitions. [2022-12-14 12:50:05,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 12:50:05,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 179 [2022-12-14 12:50:05,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:50:07,157 INFO L225 Difference]: With dead ends: 782457 [2022-12-14 12:50:07,157 INFO L226 Difference]: Without dead ends: 527989 [2022-12-14 12:50:07,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 12:50:07,482 INFO L413 NwaCegarLoop]: 3451 mSDtfsCounter, 3504 mSDsluCounter, 3598 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3504 SdHoareTripleChecker+Valid, 7049 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:50:07,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3504 Valid, 7049 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:50:07,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527989 states. [2022-12-14 12:50:27,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527989 to 525931. [2022-12-14 12:50:27,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525931 states, 469099 states have (on average 1.4629726347743226) internal successors, (686279), 471151 states have internal predecessors, (686279), 35329 states have call successors, (35329), 20477 states have call predecessors, (35329), 21501 states have return successors, (42493), 34303 states have call predecessors, (42493), 35329 states have call successors, (42493) [2022-12-14 12:50:29,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525931 states to 525931 states and 764101 transitions. [2022-12-14 12:50:29,404 INFO L78 Accepts]: Start accepts. Automaton has 525931 states and 764101 transitions. Word has length 179 [2022-12-14 12:50:29,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:50:29,404 INFO L495 AbstractCegarLoop]: Abstraction has 525931 states and 764101 transitions. [2022-12-14 12:50:29,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 12:50:29,405 INFO L276 IsEmpty]: Start isEmpty. Operand 525931 states and 764101 transitions. [2022-12-14 12:50:30,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-12-14 12:50:30,615 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:50:30,615 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, 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] [2022-12-14 12:50:30,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 12:50:30,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 12:50:30,816 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:50:30,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:50:30,816 INFO L85 PathProgramCache]: Analyzing trace with hash -508099405, now seen corresponding path program 2 times [2022-12-14 12:50:30,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:50:30,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402286851] [2022-12-14 12:50:30,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:50:30,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:50:30,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:50:31,015 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 13 proven. 60 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-14 12:50:31,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:50:31,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402286851] [2022-12-14 12:50:31,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402286851] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:50:31,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908267912] [2022-12-14 12:50:31,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:50:31,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:50:31,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:50:31,016 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:50:31,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 12:50:31,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 12:50:31,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:50:31,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:50:31,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:50:31,214 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 12:50:31,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:50:31,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908267912] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:50:31,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:50:31,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 12:50:31,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909437679] [2022-12-14 12:50:31,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:50:31,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:50:31,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:50:31,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:50:31,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:50:31,217 INFO L87 Difference]: Start difference. First operand 525931 states and 764101 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 12:50:59,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:50:59,050 INFO L93 Difference]: Finished difference Result 1051233 states and 1555113 transitions. [2022-12-14 12:50:59,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:50:59,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 179 [2022-12-14 12:50:59,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:51:01,352 INFO L225 Difference]: With dead ends: 1051233 [2022-12-14 12:51:01,352 INFO L226 Difference]: Without dead ends: 773221 [2022-12-14 12:51:02,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:51:02,056 INFO L413 NwaCegarLoop]: 3285 mSDtfsCounter, 3451 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3451 SdHoareTripleChecker+Valid, 3464 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:51:02,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3451 Valid, 3464 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:51:02,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773221 states. [2022-12-14 12:51:32,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773221 to 769119. [2022-12-14 12:51:32,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769119 states, 684647 states have (on average 1.463041538194135) internal successors, (1001667), 687211 states have internal predecessors, (1001667), 52733 states have call successors, (52733), 30713 states have call predecessors, (52733), 31737 states have return successors, (69621), 51195 states have call predecessors, (69621), 52733 states have call successors, (69621) [2022-12-14 12:51:36,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769119 states to 769119 states and 1124021 transitions. [2022-12-14 12:51:36,358 INFO L78 Accepts]: Start accepts. Automaton has 769119 states and 1124021 transitions. Word has length 179 [2022-12-14 12:51:36,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:51:36,359 INFO L495 AbstractCegarLoop]: Abstraction has 769119 states and 1124021 transitions. [2022-12-14 12:51:36,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 12:51:36,359 INFO L276 IsEmpty]: Start isEmpty. Operand 769119 states and 1124021 transitions. [2022-12-14 12:51:38,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-12-14 12:51:38,197 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:51:38,197 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, 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] [2022-12-14 12:51:38,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 12:51:38,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 12:51:38,398 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:51:38,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:51:38,399 INFO L85 PathProgramCache]: Analyzing trace with hash -253489519, now seen corresponding path program 3 times [2022-12-14 12:51:38,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:51:38,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711072442] [2022-12-14 12:51:38,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:38,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:51:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 13 proven. 60 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-14 12:51:38,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:51:38,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711072442] [2022-12-14 12:51:38,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711072442] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:51:38,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781740274] [2022-12-14 12:51:38,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:51:38,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:38,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:51:38,686 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:51:38,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 12:51:38,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:51:38,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:51:38,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:51:38,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:51:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 12:51:38,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:51:38,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781740274] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:51:38,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:51:38,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 12:51:38,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658951310] [2022-12-14 12:51:38,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:51:38,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:51:38,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:51:38,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:51:38,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:51:38,939 INFO L87 Difference]: Start difference. First operand 769119 states and 1124021 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 12:52:11,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:52:11,443 INFO L93 Difference]: Finished difference Result 1370169 states and 1988480 transitions. [2022-12-14 12:52:11,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:52:11,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 179 [2022-12-14 12:52:11,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:52:14,187 INFO L225 Difference]: With dead ends: 1370169 [2022-12-14 12:52:14,187 INFO L226 Difference]: Without dead ends: 845897 [2022-12-14 12:52:15,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:52:15,498 INFO L413 NwaCegarLoop]: 3277 mSDtfsCounter, 3413 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3413 SdHoareTripleChecker+Valid, 3338 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:52:15,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3413 Valid, 3338 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:52:16,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845897 states. [2022-12-14 12:52:47,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845897 to 844617. [2022-12-14 12:52:47,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844617 states, 755809 states have (on average 1.4357026709128893) internal successors, (1085117), 756837 states have internal predecessors, (1085117), 54259 states have call successors, (54259), 35311 states have call predecessors, (54259), 34547 states have return successors, (66541), 52469 states have call predecessors, (66541), 54259 states have call successors, (66541) [2022-12-14 12:52:50,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844617 states to 844617 states and 1205917 transitions. [2022-12-14 12:52:50,770 INFO L78 Accepts]: Start accepts. Automaton has 844617 states and 1205917 transitions. Word has length 179 [2022-12-14 12:52:50,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:52:50,770 INFO L495 AbstractCegarLoop]: Abstraction has 844617 states and 1205917 transitions. [2022-12-14 12:52:50,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 12:52:50,771 INFO L276 IsEmpty]: Start isEmpty. Operand 844617 states and 1205917 transitions. [2022-12-14 12:52:52,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-12-14 12:52:52,437 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:52:52,437 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, 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] [2022-12-14 12:52:52,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 12:52:52,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:52:52,639 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:52:52,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:52:52,641 INFO L85 PathProgramCache]: Analyzing trace with hash -738664238, now seen corresponding path program 1 times [2022-12-14 12:52:52,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:52:52,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072302479] [2022-12-14 12:52:52,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:52:52,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:52:52,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:52:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 13 proven. 61 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 12:52:52,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:52:52,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072302479] [2022-12-14 12:52:52,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072302479] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:52:52,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489929234] [2022-12-14 12:52:52,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:52:52,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:52:52,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:52:52,834 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:52:52,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 12:52:53,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:52:53,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 1085 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:52:53,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:52:53,156 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-14 12:52:53,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:52:53,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489929234] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:52:53,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:52:53,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 12:52:53,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748873752] [2022-12-14 12:52:53,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:52:53,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:52:53,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:52:53,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:52:53,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:52:53,159 INFO L87 Difference]: Start difference. First operand 844617 states and 1205917 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 12:53:16,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:53:16,103 INFO L93 Difference]: Finished difference Result 1123909 states and 1617553 transitions. [2022-12-14 12:53:16,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:53:16,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 179 [2022-12-14 12:53:16,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:53:17,774 INFO L225 Difference]: With dead ends: 1123909 [2022-12-14 12:53:17,775 INFO L226 Difference]: Without dead ends: 563039 [2022-12-14 12:53:18,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:53:18,891 INFO L413 NwaCegarLoop]: 3411 mSDtfsCounter, 197 mSDsluCounter, 3237 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 6648 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:53:18,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 6648 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:53:19,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563039 states. [2022-12-14 12:53:40,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563039 to 560477. [2022-12-14 12:53:40,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560477 states, 501351 states have (on average 1.4301258000881618) internal successors, (716995), 501867 states have internal predecessors, (716995), 36347 states have call successors, (36347), 23543 states have call predecessors, (36347), 22777 states have return successors, (38395), 35067 states have call predecessors, (38395), 36347 states have call successors, (38395) [2022-12-14 12:53:42,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560477 states to 560477 states and 791737 transitions. [2022-12-14 12:53:42,134 INFO L78 Accepts]: Start accepts. Automaton has 560477 states and 791737 transitions. Word has length 179 [2022-12-14 12:53:42,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:53:42,135 INFO L495 AbstractCegarLoop]: Abstraction has 560477 states and 791737 transitions. [2022-12-14 12:53:42,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 12:53:42,135 INFO L276 IsEmpty]: Start isEmpty. Operand 560477 states and 791737 transitions. [2022-12-14 12:53:43,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-12-14 12:53:43,231 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:53:43,231 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, 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] [2022-12-14 12:53:43,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 12:53:43,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:53:43,433 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:53:43,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:53:43,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1782729793, now seen corresponding path program 1 times [2022-12-14 12:53:43,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:53:43,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32752484] [2022-12-14 12:53:43,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:53:43,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:53:43,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:53:43,622 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 13 proven. 61 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 12:53:43,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:53:43,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32752484] [2022-12-14 12:53:43,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32752484] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:53:43,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572715929] [2022-12-14 12:53:43,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:53:43,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:53:43,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:53:43,624 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:53:43,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff9cc0c-33ce-438d-afa7-815e0bd937f6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 12:53:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:53:43,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 1087 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:53:43,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:53:43,845 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 12:53:43,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:53:43,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572715929] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:53:43,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:53:43,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 12:53:43,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406483534] [2022-12-14 12:53:43,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:53:43,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:53:43,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:53:43,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:53:43,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 12:53:43,847 INFO L87 Difference]: Start difference. First operand 560477 states and 791737 transitions. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:54:19,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:54:19,751 INFO L93 Difference]: Finished difference Result 1389869 states and 1961731 transitions. [2022-12-14 12:54:19,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:54:19,752 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 180 [2022-12-14 12:54:19,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:54:22,400 INFO L225 Difference]: With dead ends: 1389869 [2022-12-14 12:54:22,400 INFO L226 Difference]: Without dead ends: 831039 [2022-12-14 12:54:23,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 12:54:23,198 INFO L413 NwaCegarLoop]: 3243 mSDtfsCounter, 7295 mSDsluCounter, 6381 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7313 SdHoareTripleChecker+Valid, 9624 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:54:23,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7313 Valid, 9624 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 12:54:23,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831039 states.