./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d5746a53d1ab0f7d20d2e5362b7235e80167d7cee80ddadf160c57caf25829fe --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:51:35,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:51:35,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:51:35,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:51:35,106 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:51:35,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:51:35,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:51:35,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:51:35,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:51:35,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:51:35,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:51:35,117 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:51:35,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:51:35,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:51:35,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:51:35,121 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:51:35,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:51:35,124 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:51:35,126 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:51:35,128 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:51:35,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:51:35,131 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:51:35,133 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:51:35,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:51:35,138 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:51:35,138 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:51:35,139 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:51:35,140 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:51:35,141 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:51:35,142 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:51:35,143 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:51:35,144 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:51:35,145 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:51:35,146 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:51:35,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:51:35,148 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:51:35,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:51:35,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:51:35,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:51:35,151 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:51:35,152 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:51:35,153 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:51:35,180 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:51:35,181 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:51:35,181 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:51:35,182 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:51:35,182 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:51:35,183 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:51:35,183 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:51:35,184 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:51:35,184 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:51:35,184 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:51:35,185 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:51:35,185 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:51:35,185 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:51:35,185 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:51:35,186 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:51:35,186 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:51:35,186 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:51:35,186 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:51:35,186 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:51:35,187 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:51:35,187 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:51:35,187 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:51:35,187 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:51:35,188 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:51:35,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:51:35,188 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:51:35,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:51:35,189 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:51:35,189 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:51:35,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:51:35,190 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:51:35,190 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:51:35,190 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:51:35,190 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:51:35,191 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d5746a53d1ab0f7d20d2e5362b7235e80167d7cee80ddadf160c57caf25829fe [2022-11-25 17:51:35,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:51:35,470 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:51:35,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:51:35,474 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:51:35,474 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:51:35,476 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-1.c [2022-11-25 17:51:38,620 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:51:38,913 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:51:38,913 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-1.c [2022-11-25 17:51:38,924 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/data/124fa1f27/e4c5720ef8074cfaaf5727fe66fc9153/FLAG41c11e906 [2022-11-25 17:51:38,939 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/data/124fa1f27/e4c5720ef8074cfaaf5727fe66fc9153 [2022-11-25 17:51:38,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:51:38,944 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:51:38,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:51:38,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:51:38,952 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:51:38,953 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:51:38" (1/1) ... [2022-11-25 17:51:38,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1817fc89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:38, skipping insertion in model container [2022-11-25 17:51:38,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:51:38" (1/1) ... [2022-11-25 17:51:38,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:51:39,020 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:51:39,158 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_f1857b0d-7444-44b1-a830-57cdde0d2b85/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-1.c[913,926] [2022-11-25 17:51:39,204 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_f1857b0d-7444-44b1-a830-57cdde0d2b85/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-1.c[5977,5990] [2022-11-25 17:51:39,253 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:51:39,265 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:51:39,281 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_f1857b0d-7444-44b1-a830-57cdde0d2b85/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-1.c[913,926] [2022-11-25 17:51:39,304 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_f1857b0d-7444-44b1-a830-57cdde0d2b85/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-1.c[5977,5990] [2022-11-25 17:51:39,349 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:51:39,375 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:51:39,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:39 WrapperNode [2022-11-25 17:51:39,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:51:39,377 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:51:39,377 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:51:39,378 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:51:39,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:39" (1/1) ... [2022-11-25 17:51:39,394 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:39" (1/1) ... [2022-11-25 17:51:39,436 INFO L138 Inliner]: procedures = 54, calls = 58, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 538 [2022-11-25 17:51:39,437 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:51:39,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:51:39,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:51:39,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:51:39,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:39" (1/1) ... [2022-11-25 17:51:39,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:39" (1/1) ... [2022-11-25 17:51:39,459 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:39" (1/1) ... [2022-11-25 17:51:39,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:39" (1/1) ... [2022-11-25 17:51:39,467 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:39" (1/1) ... [2022-11-25 17:51:39,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:39" (1/1) ... [2022-11-25 17:51:39,500 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:39" (1/1) ... [2022-11-25 17:51:39,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:39" (1/1) ... [2022-11-25 17:51:39,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:51:39,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:51:39,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:51:39,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:51:39,511 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:39" (1/1) ... [2022-11-25 17:51:39,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:51:39,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:51:39,553 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:51:39,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:51:39,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:51:39,590 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-25 17:51:39,590 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-25 17:51:39,590 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-11-25 17:51:39,590 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-11-25 17:51:39,590 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-25 17:51:39,590 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-25 17:51:39,590 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-25 17:51:39,591 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-25 17:51:39,591 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-25 17:51:39,591 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-25 17:51:39,591 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-25 17:51:39,591 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-25 17:51:39,591 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-25 17:51:39,592 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-25 17:51:39,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:51:39,592 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-25 17:51:39,592 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-25 17:51:39,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:51:39,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:51:39,593 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-25 17:51:39,593 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-25 17:51:39,593 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-25 17:51:39,593 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-25 17:51:39,709 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:51:39,724 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:51:40,359 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:51:40,370 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:51:40,370 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-25 17:51:40,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:51:40 BoogieIcfgContainer [2022-11-25 17:51:40,373 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:51:40,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:51:40,376 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:51:40,380 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:51:40,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:51:38" (1/3) ... [2022-11-25 17:51:40,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e0657b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:51:40, skipping insertion in model container [2022-11-25 17:51:40,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:39" (2/3) ... [2022-11-25 17:51:40,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e0657b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:51:40, skipping insertion in model container [2022-11-25 17:51:40,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:51:40" (3/3) ... [2022-11-25 17:51:40,383 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.03.cil-1.c [2022-11-25 17:51:40,405 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:51:40,405 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-25 17:51:40,469 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:51:40,476 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=PETRI_NET, 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;@6adb9e28, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:51:40,477 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 17:51:40,482 INFO L276 IsEmpty]: Start isEmpty. Operand has 237 states, 199 states have (on average 1.592964824120603) internal successors, (317), 206 states have internal predecessors, (317), 25 states have call successors, (25), 10 states have call predecessors, (25), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-25 17:51:40,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-25 17:51:40,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:51:40,495 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] [2022-11-25 17:51:40,495 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:51:40,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:40,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1832472135, now seen corresponding path program 1 times [2022-11-25 17:51:40,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:40,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559461874] [2022-11-25 17:51:40,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:40,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:40,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:40,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-25 17:51:40,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:40,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 17:51:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:51:40,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:40,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559461874] [2022-11-25 17:51:40,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559461874] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:51:40,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:51:40,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:51:40,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874304889] [2022-11-25 17:51:40,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:51:40,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:51:40,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:40,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:51:40,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:51:40,896 INFO L87 Difference]: Start difference. First operand has 237 states, 199 states have (on average 1.592964824120603) internal successors, (317), 206 states have internal predecessors, (317), 25 states have call successors, (25), 10 states have call predecessors, (25), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:51:41,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:51:41,501 INFO L93 Difference]: Finished difference Result 527 states and 820 transitions. [2022-11-25 17:51:41,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:51:41,504 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-11-25 17:51:41,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:51:41,525 INFO L225 Difference]: With dead ends: 527 [2022-11-25 17:51:41,525 INFO L226 Difference]: Without dead ends: 296 [2022-11-25 17:51:41,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:51:41,539 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 417 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:51:41,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 516 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:51:41,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-11-25 17:51:41,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 290. [2022-11-25 17:51:41,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 248 states have (on average 1.4596774193548387) internal successors, (362), 253 states have internal predecessors, (362), 29 states have call successors, (29), 12 states have call predecessors, (29), 11 states have return successors, (31), 25 states have call predecessors, (31), 25 states have call successors, (31) [2022-11-25 17:51:41,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 422 transitions. [2022-11-25 17:51:41,629 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 422 transitions. Word has length 44 [2022-11-25 17:51:41,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:51:41,630 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 422 transitions. [2022-11-25 17:51:41,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:51:41,631 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 422 transitions. [2022-11-25 17:51:41,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-25 17:51:41,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:51:41,639 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] [2022-11-25 17:51:41,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:51:41,640 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:51:41,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:41,641 INFO L85 PathProgramCache]: Analyzing trace with hash -882534523, now seen corresponding path program 1 times [2022-11-25 17:51:41,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:41,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829488935] [2022-11-25 17:51:41,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:41,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:41,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-25 17:51:41,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:41,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-25 17:51:41,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:51:41,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:41,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829488935] [2022-11-25 17:51:41,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829488935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:51:41,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:51:41,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:51:41,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152539658] [2022-11-25 17:51:41,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:51:41,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:51:41,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:41,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:51:41,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:51:41,824 INFO L87 Difference]: Start difference. First operand 290 states and 422 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:51:42,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:51:42,224 INFO L93 Difference]: Finished difference Result 538 states and 762 transitions. [2022-11-25 17:51:42,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:51:42,225 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-11-25 17:51:42,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:51:42,228 INFO L225 Difference]: With dead ends: 538 [2022-11-25 17:51:42,228 INFO L226 Difference]: Without dead ends: 414 [2022-11-25 17:51:42,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:51:42,230 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 190 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:51:42,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 666 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:51:42,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-11-25 17:51:42,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 357. [2022-11-25 17:51:42,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 309 states have (on average 1.4433656957928802) internal successors, (446), 314 states have internal predecessors, (446), 32 states have call successors, (32), 15 states have call predecessors, (32), 14 states have return successors, (34), 28 states have call predecessors, (34), 28 states have call successors, (34) [2022-11-25 17:51:42,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 512 transitions. [2022-11-25 17:51:42,263 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 512 transitions. Word has length 45 [2022-11-25 17:51:42,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:51:42,264 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 512 transitions. [2022-11-25 17:51:42,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:51:42,264 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 512 transitions. [2022-11-25 17:51:42,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-25 17:51:42,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:51:42,266 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] [2022-11-25 17:51:42,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:51:42,266 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:51:42,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:42,267 INFO L85 PathProgramCache]: Analyzing trace with hash 2128075312, now seen corresponding path program 1 times [2022-11-25 17:51:42,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:42,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530707409] [2022-11-25 17:51:42,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:42,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:42,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:42,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-25 17:51:42,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:42,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-25 17:51:42,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:42,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:51:42,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:42,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530707409] [2022-11-25 17:51:42,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530707409] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:51:42,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:51:42,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:51:42,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723472232] [2022-11-25 17:51:42,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:51:42,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:51:42,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:42,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:51:42,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:51:42,351 INFO L87 Difference]: Start difference. First operand 357 states and 512 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:51:42,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:51:42,660 INFO L93 Difference]: Finished difference Result 765 states and 1071 transitions. [2022-11-25 17:51:42,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:51:42,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-11-25 17:51:42,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:51:42,664 INFO L225 Difference]: With dead ends: 765 [2022-11-25 17:51:42,664 INFO L226 Difference]: Without dead ends: 574 [2022-11-25 17:51:42,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:51:42,666 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 426 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:51:42,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 508 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:51:42,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-11-25 17:51:42,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 522. [2022-11-25 17:51:42,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 455 states have (on average 1.3978021978021977) internal successors, (636), 463 states have internal predecessors, (636), 43 states have call successors, (43), 22 states have call predecessors, (43), 22 states have return successors, (51), 37 states have call predecessors, (51), 39 states have call successors, (51) [2022-11-25 17:51:42,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 730 transitions. [2022-11-25 17:51:42,711 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 730 transitions. Word has length 45 [2022-11-25 17:51:42,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:51:42,712 INFO L495 AbstractCegarLoop]: Abstraction has 522 states and 730 transitions. [2022-11-25 17:51:42,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:51:42,712 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 730 transitions. [2022-11-25 17:51:42,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-25 17:51:42,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:51:42,715 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 17:51:42,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:51:42,715 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:51:42,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:42,716 INFO L85 PathProgramCache]: Analyzing trace with hash 888089079, now seen corresponding path program 1 times [2022-11-25 17:51:42,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:42,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573534920] [2022-11-25 17:51:42,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:42,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:42,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-25 17:51:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:42,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-25 17:51:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:42,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-25 17:51:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:42,840 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 17:51:42,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:42,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573534920] [2022-11-25 17:51:42,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573534920] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:51:42,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:51:42,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:51:42,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490807035] [2022-11-25 17:51:42,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:51:42,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:51:42,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:42,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:51:42,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:51:42,843 INFO L87 Difference]: Start difference. First operand 522 states and 730 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 17:51:43,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:51:43,204 INFO L93 Difference]: Finished difference Result 1106 states and 1515 transitions. [2022-11-25 17:51:43,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:51:43,204 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2022-11-25 17:51:43,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:51:43,211 INFO L225 Difference]: With dead ends: 1106 [2022-11-25 17:51:43,212 INFO L226 Difference]: Without dead ends: 750 [2022-11-25 17:51:43,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:51:43,224 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 174 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:51:43,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 718 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:51:43,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-11-25 17:51:43,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 712. [2022-11-25 17:51:43,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 621 states have (on average 1.3462157809983897) internal successors, (836), 631 states have internal predecessors, (836), 57 states have call successors, (57), 30 states have call predecessors, (57), 32 states have return successors, (75), 51 states have call predecessors, (75), 53 states have call successors, (75) [2022-11-25 17:51:43,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 968 transitions. [2022-11-25 17:51:43,300 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 968 transitions. Word has length 62 [2022-11-25 17:51:43,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:51:43,302 INFO L495 AbstractCegarLoop]: Abstraction has 712 states and 968 transitions. [2022-11-25 17:51:43,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 17:51:43,302 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 968 transitions. [2022-11-25 17:51:43,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-25 17:51:43,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:51:43,308 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 17:51:43,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:51:43,310 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:51:43,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:43,311 INFO L85 PathProgramCache]: Analyzing trace with hash 306547218, now seen corresponding path program 1 times [2022-11-25 17:51:43,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:43,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895327958] [2022-11-25 17:51:43,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:43,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:43,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:43,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-25 17:51:43,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:43,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-25 17:51:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:43,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-25 17:51:43,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 17:51:43,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:43,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895327958] [2022-11-25 17:51:43,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895327958] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:51:43,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:51:43,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:51:43,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327969474] [2022-11-25 17:51:43,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:51:43,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:51:43,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:43,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:51:43,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:51:43,432 INFO L87 Difference]: Start difference. First operand 712 states and 968 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 17:51:43,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:51:43,748 INFO L93 Difference]: Finished difference Result 1365 states and 1821 transitions. [2022-11-25 17:51:43,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:51:43,749 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-11-25 17:51:43,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:51:43,755 INFO L225 Difference]: With dead ends: 1365 [2022-11-25 17:51:43,755 INFO L226 Difference]: Without dead ends: 911 [2022-11-25 17:51:43,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:51:43,760 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 413 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:51:43,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 506 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:51:43,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2022-11-25 17:51:43,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 856. [2022-11-25 17:51:43,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 749 states have (on average 1.3177570093457944) internal successors, (987), 761 states have internal predecessors, (987), 65 states have call successors, (65), 36 states have call predecessors, (65), 40 states have return successors, (89), 59 states have call predecessors, (89), 61 states have call successors, (89) [2022-11-25 17:51:43,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1141 transitions. [2022-11-25 17:51:43,870 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1141 transitions. Word has length 67 [2022-11-25 17:51:43,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:51:43,870 INFO L495 AbstractCegarLoop]: Abstraction has 856 states and 1141 transitions. [2022-11-25 17:51:43,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 17:51:43,871 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1141 transitions. [2022-11-25 17:51:43,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-25 17:51:43,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:51:43,874 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:51:43,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:51:43,875 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:51:43,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:43,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1645428910, now seen corresponding path program 1 times [2022-11-25 17:51:43,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:43,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415671339] [2022-11-25 17:51:43,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:43,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:43,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:43,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-25 17:51:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:43,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 17:51:43,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:44,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-25 17:51:44,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:51:44,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:44,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415671339] [2022-11-25 17:51:44,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415671339] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:51:44,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754704037] [2022-11-25 17:51:44,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:44,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:51:44,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:51:44,039 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:51:44,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:51:44,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:44,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 17:51:44,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:51:44,354 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:51:44,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:51:44,426 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 17:51:44,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754704037] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:51:44,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:51:44,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2022-11-25 17:51:44,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194339419] [2022-11-25 17:51:44,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:51:44,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:51:44,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:44,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:51:44,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:51:44,435 INFO L87 Difference]: Start difference. First operand 856 states and 1141 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 17:51:44,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:51:44,623 INFO L93 Difference]: Finished difference Result 912 states and 1209 transitions. [2022-11-25 17:51:44,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:51:44,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2022-11-25 17:51:44,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:51:44,629 INFO L225 Difference]: With dead ends: 912 [2022-11-25 17:51:44,629 INFO L226 Difference]: Without dead ends: 909 [2022-11-25 17:51:44,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:51:44,632 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 577 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:51:44,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [577 Valid, 423 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:51:44,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-11-25 17:51:44,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 855. [2022-11-25 17:51:44,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 749 states have (on average 1.315086782376502) internal successors, (985), 760 states have internal predecessors, (985), 64 states have call successors, (64), 36 states have call predecessors, (64), 40 states have return successors, (89), 59 states have call predecessors, (89), 61 states have call successors, (89) [2022-11-25 17:51:44,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1138 transitions. [2022-11-25 17:51:44,716 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1138 transitions. Word has length 68 [2022-11-25 17:51:44,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:51:44,718 INFO L495 AbstractCegarLoop]: Abstraction has 855 states and 1138 transitions. [2022-11-25 17:51:44,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 17:51:44,718 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1138 transitions. [2022-11-25 17:51:44,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-25 17:51:44,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:51:44,721 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:51:44,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:51:44,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:51:44,932 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:51:44,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:44,933 INFO L85 PathProgramCache]: Analyzing trace with hash 530550805, now seen corresponding path program 1 times [2022-11-25 17:51:44,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:44,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526523237] [2022-11-25 17:51:44,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:44,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:44,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-25 17:51:44,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:44,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 17:51:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:45,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-25 17:51:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:51:45,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:45,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526523237] [2022-11-25 17:51:45,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526523237] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:51:45,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804235650] [2022-11-25 17:51:45,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:45,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:51:45,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:51:45,100 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:51:45,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:51:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:45,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:51:45,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:51:45,544 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:51:45,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:51:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 17:51:45,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804235650] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:51:45,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:51:45,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2022-11-25 17:51:45,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125735119] [2022-11-25 17:51:45,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:51:45,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 17:51:45,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:45,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 17:51:45,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:51:45,640 INFO L87 Difference]: Start difference. First operand 855 states and 1138 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-25 17:51:47,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:51:47,182 INFO L93 Difference]: Finished difference Result 2555 states and 3358 transitions. [2022-11-25 17:51:47,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-25 17:51:47,183 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2022-11-25 17:51:47,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:51:47,192 INFO L225 Difference]: With dead ends: 2555 [2022-11-25 17:51:47,193 INFO L226 Difference]: Without dead ends: 2011 [2022-11-25 17:51:47,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2022-11-25 17:51:47,196 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 751 mSDsluCounter, 2034 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 2395 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 17:51:47,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [775 Valid, 2395 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 17:51:47,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2022-11-25 17:51:47,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 1244. [2022-11-25 17:51:47,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1099 states have (on average 1.2911737943585078) internal successors, (1419), 1118 states have internal predecessors, (1419), 84 states have call successors, (84), 50 states have call predecessors, (84), 59 states have return successors, (123), 76 states have call predecessors, (123), 81 states have call successors, (123) [2022-11-25 17:51:47,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1626 transitions. [2022-11-25 17:51:47,318 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1626 transitions. Word has length 69 [2022-11-25 17:51:47,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:51:47,318 INFO L495 AbstractCegarLoop]: Abstraction has 1244 states and 1626 transitions. [2022-11-25 17:51:47,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-25 17:51:47,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1626 transitions. [2022-11-25 17:51:47,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-25 17:51:47,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:51:47,322 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:51:47,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-25 17:51:47,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:51:47,528 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:51:47,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:47,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1086322536, now seen corresponding path program 1 times [2022-11-25 17:51:47,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:47,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805173996] [2022-11-25 17:51:47,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:47,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:47,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-25 17:51:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:47,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 17:51:47,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:47,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 17:51:47,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:47,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-25 17:51:47,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:47,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-25 17:51:47,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:47,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:51:47,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:47,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805173996] [2022-11-25 17:51:47,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805173996] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:51:47,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:51:47,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 17:51:47,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715739049] [2022-11-25 17:51:47,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:51:47,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:51:47,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:47,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:51:47,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:51:47,721 INFO L87 Difference]: Start difference. First operand 1244 states and 1626 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 17:51:48,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:51:48,926 INFO L93 Difference]: Finished difference Result 1626 states and 2217 transitions. [2022-11-25 17:51:48,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:51:48,927 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2022-11-25 17:51:48,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:51:48,934 INFO L225 Difference]: With dead ends: 1626 [2022-11-25 17:51:48,934 INFO L226 Difference]: Without dead ends: 1478 [2022-11-25 17:51:48,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:51:48,940 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 687 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 17:51:48,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 796 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 17:51:48,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2022-11-25 17:51:49,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1391. [2022-11-25 17:51:49,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1227 states have (on average 1.317033414832926) internal successors, (1616), 1247 states have internal predecessors, (1616), 96 states have call successors, (96), 56 states have call predecessors, (96), 66 states have return successors, (138), 88 states have call predecessors, (138), 93 states have call successors, (138) [2022-11-25 17:51:49,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 1850 transitions. [2022-11-25 17:51:49,131 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 1850 transitions. Word has length 80 [2022-11-25 17:51:49,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:51:49,132 INFO L495 AbstractCegarLoop]: Abstraction has 1391 states and 1850 transitions. [2022-11-25 17:51:49,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 17:51:49,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 1850 transitions. [2022-11-25 17:51:49,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-25 17:51:49,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:51:49,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:51:49,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 17:51:49,136 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:51:49,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:49,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1967204244, now seen corresponding path program 1 times [2022-11-25 17:51:49,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:49,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103681702] [2022-11-25 17:51:49,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:49,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:49,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:49,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-25 17:51:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:49,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 17:51:49,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:49,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 17:51:49,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:49,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-25 17:51:49,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:49,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-25 17:51:49,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:49,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:51:49,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:49,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103681702] [2022-11-25 17:51:49,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103681702] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:51:49,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:51:49,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:51:49,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687030964] [2022-11-25 17:51:49,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:51:49,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:51:49,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:49,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:51:49,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:51:49,274 INFO L87 Difference]: Start difference. First operand 1391 states and 1850 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 17:51:50,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:51:50,896 INFO L93 Difference]: Finished difference Result 1964 states and 2730 transitions. [2022-11-25 17:51:50,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:51:50,897 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2022-11-25 17:51:50,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:51:50,905 INFO L225 Difference]: With dead ends: 1964 [2022-11-25 17:51:50,905 INFO L226 Difference]: Without dead ends: 1669 [2022-11-25 17:51:50,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-25 17:51:50,910 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 682 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 1356 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:51:50,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [696 Valid, 1326 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1356 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-25 17:51:50,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2022-11-25 17:51:51,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1529. [2022-11-25 17:51:51,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1346 states have (on average 1.3335809806835066) internal successors, (1795), 1367 states have internal predecessors, (1795), 108 states have call successors, (108), 62 states have call predecessors, (108), 73 states have return successors, (152), 101 states have call predecessors, (152), 105 states have call successors, (152) [2022-11-25 17:51:51,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 2055 transitions. [2022-11-25 17:51:51,103 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 2055 transitions. Word has length 80 [2022-11-25 17:51:51,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:51:51,104 INFO L495 AbstractCegarLoop]: Abstraction has 1529 states and 2055 transitions. [2022-11-25 17:51:51,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 17:51:51,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 2055 transitions. [2022-11-25 17:51:51,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-25 17:51:51,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:51:51,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:51:51,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 17:51:51,108 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:51:51,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:51,109 INFO L85 PathProgramCache]: Analyzing trace with hash 281024406, now seen corresponding path program 1 times [2022-11-25 17:51:51,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:51,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913180910] [2022-11-25 17:51:51,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:51,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:51,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:51,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-25 17:51:51,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:51,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 17:51:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:51,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 17:51:51,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:51,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-25 17:51:51,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:51,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-25 17:51:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:51,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:51:51,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:51,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913180910] [2022-11-25 17:51:51,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913180910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:51:51,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:51:51,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:51:51,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919294651] [2022-11-25 17:51:51,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:51:51,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:51:51,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:51,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:51:51,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:51:51,246 INFO L87 Difference]: Start difference. First operand 1529 states and 2055 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 17:51:52,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:51:52,696 INFO L93 Difference]: Finished difference Result 2461 states and 3483 transitions. [2022-11-25 17:51:52,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:51:52,696 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2022-11-25 17:51:52,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:51:52,705 INFO L225 Difference]: With dead ends: 2461 [2022-11-25 17:51:52,705 INFO L226 Difference]: Without dead ends: 2028 [2022-11-25 17:51:52,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-25 17:51:52,708 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 680 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 1324 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:51:52,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 1324 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 17:51:52,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2028 states. [2022-11-25 17:51:52,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2028 to 1806. [2022-11-25 17:51:52,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1585 states have (on average 1.3589905362776025) internal successors, (2154), 1608 states have internal predecessors, (2154), 132 states have call successors, (132), 74 states have call predecessors, (132), 87 states have return successors, (184), 127 states have call predecessors, (184), 129 states have call successors, (184) [2022-11-25 17:51:52,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 2470 transitions. [2022-11-25 17:51:52,915 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 2470 transitions. Word has length 80 [2022-11-25 17:51:52,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:51:52,916 INFO L495 AbstractCegarLoop]: Abstraction has 1806 states and 2470 transitions. [2022-11-25 17:51:52,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 17:51:52,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 2470 transitions. [2022-11-25 17:51:52,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-25 17:51:52,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:51:52,920 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:51:52,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 17:51:52,920 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:51:52,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:52,921 INFO L85 PathProgramCache]: Analyzing trace with hash 226631508, now seen corresponding path program 1 times [2022-11-25 17:51:52,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:52,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686838800] [2022-11-25 17:51:52,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:52,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:52,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:53,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-25 17:51:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:53,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 17:51:53,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:53,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 17:51:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:53,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-25 17:51:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:53,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-25 17:51:53,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:53,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:51:53,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:53,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686838800] [2022-11-25 17:51:53,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686838800] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:51:53,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:51:53,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:51:53,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352308911] [2022-11-25 17:51:53,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:51:53,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:51:53,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:53,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:51:53,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:51:53,101 INFO L87 Difference]: Start difference. First operand 1806 states and 2470 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 17:51:54,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:51:54,077 INFO L93 Difference]: Finished difference Result 2726 states and 3889 transitions. [2022-11-25 17:51:54,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:51:54,077 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2022-11-25 17:51:54,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:51:54,086 INFO L225 Difference]: With dead ends: 2726 [2022-11-25 17:51:54,086 INFO L226 Difference]: Without dead ends: 2016 [2022-11-25 17:51:54,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:51:54,089 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 556 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:51:54,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 794 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 17:51:54,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2022-11-25 17:51:54,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1806. [2022-11-25 17:51:54,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1585 states have (on average 1.3558359621451104) internal successors, (2149), 1608 states have internal predecessors, (2149), 132 states have call successors, (132), 74 states have call predecessors, (132), 87 states have return successors, (184), 127 states have call predecessors, (184), 129 states have call successors, (184) [2022-11-25 17:51:54,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 2465 transitions. [2022-11-25 17:51:54,314 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 2465 transitions. Word has length 80 [2022-11-25 17:51:54,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:51:54,315 INFO L495 AbstractCegarLoop]: Abstraction has 1806 states and 2465 transitions. [2022-11-25 17:51:54,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 17:51:54,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 2465 transitions. [2022-11-25 17:51:54,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-25 17:51:54,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:51:54,319 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:51:54,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 17:51:54,320 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:51:54,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:54,323 INFO L85 PathProgramCache]: Analyzing trace with hash -190765098, now seen corresponding path program 1 times [2022-11-25 17:51:54,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:54,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81910305] [2022-11-25 17:51:54,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:54,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:54,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:54,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-25 17:51:54,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:54,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 17:51:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:54,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 17:51:54,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:54,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-25 17:51:54,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:54,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-25 17:51:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:54,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:51:54,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:54,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81910305] [2022-11-25 17:51:54,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81910305] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:51:54,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:51:54,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:51:54,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519623366] [2022-11-25 17:51:54,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:51:54,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:51:54,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:54,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:51:54,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:51:54,445 INFO L87 Difference]: Start difference. First operand 1806 states and 2465 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 17:51:55,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:51:55,339 INFO L93 Difference]: Finished difference Result 2720 states and 3863 transitions. [2022-11-25 17:51:55,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:51:55,339 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2022-11-25 17:51:55,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:51:55,370 INFO L225 Difference]: With dead ends: 2720 [2022-11-25 17:51:55,370 INFO L226 Difference]: Without dead ends: 2010 [2022-11-25 17:51:55,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:51:55,373 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 571 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:51:55,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [586 Valid, 791 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:51:55,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2010 states. [2022-11-25 17:51:55,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2010 to 1806. [2022-11-25 17:51:55,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1585 states have (on average 1.3526813880126183) internal successors, (2144), 1608 states have internal predecessors, (2144), 132 states have call successors, (132), 74 states have call predecessors, (132), 87 states have return successors, (184), 127 states have call predecessors, (184), 129 states have call successors, (184) [2022-11-25 17:51:55,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 2460 transitions. [2022-11-25 17:51:55,597 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 2460 transitions. Word has length 80 [2022-11-25 17:51:55,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:51:55,597 INFO L495 AbstractCegarLoop]: Abstraction has 1806 states and 2460 transitions. [2022-11-25 17:51:55,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 17:51:55,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 2460 transitions. [2022-11-25 17:51:55,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-25 17:51:55,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:51:55,601 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:51:55,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 17:51:55,602 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:51:55,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:55,602 INFO L85 PathProgramCache]: Analyzing trace with hash 488507156, now seen corresponding path program 1 times [2022-11-25 17:51:55,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:55,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417214836] [2022-11-25 17:51:55,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:55,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:55,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-25 17:51:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:55,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 17:51:55,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:55,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 17:51:55,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:55,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-25 17:51:55,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:55,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-25 17:51:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:51:55,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:55,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417214836] [2022-11-25 17:51:55,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417214836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:51:55,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:51:55,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:51:55,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043297201] [2022-11-25 17:51:55,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:51:55,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:51:55,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:55,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:51:55,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:51:55,757 INFO L87 Difference]: Start difference. First operand 1806 states and 2460 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 17:51:57,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:51:57,512 INFO L93 Difference]: Finished difference Result 3507 states and 5012 transitions. [2022-11-25 17:51:57,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:51:57,513 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2022-11-25 17:51:57,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:51:57,525 INFO L225 Difference]: With dead ends: 3507 [2022-11-25 17:51:57,525 INFO L226 Difference]: Without dead ends: 2797 [2022-11-25 17:51:57,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:51:57,529 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 723 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:51:57,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [741 Valid, 1314 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 17:51:57,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2022-11-25 17:51:57,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 2362. [2022-11-25 17:51:57,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2362 states, 2069 states have (on average 1.3852102464958918) internal successors, (2866), 2096 states have internal predecessors, (2866), 176 states have call successors, (176), 98 states have call predecessors, (176), 115 states have return successors, (250), 175 states have call predecessors, (250), 173 states have call successors, (250) [2022-11-25 17:51:57,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 3292 transitions. [2022-11-25 17:51:57,842 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 3292 transitions. Word has length 80 [2022-11-25 17:51:57,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:51:57,842 INFO L495 AbstractCegarLoop]: Abstraction has 2362 states and 3292 transitions. [2022-11-25 17:51:57,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 17:51:57,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 3292 transitions. [2022-11-25 17:51:57,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-25 17:51:57,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:51:57,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:51:57,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 17:51:57,847 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:51:57,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:57,848 INFO L85 PathProgramCache]: Analyzing trace with hash 690331090, now seen corresponding path program 1 times [2022-11-25 17:51:57,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:57,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790939963] [2022-11-25 17:51:57,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:57,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:57,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:57,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-25 17:51:57,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:57,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 17:51:57,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:57,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 17:51:57,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:57,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-25 17:51:57,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:57,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-25 17:51:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:51:57,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:51:57,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:57,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790939963] [2022-11-25 17:51:57,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790939963] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:51:57,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:51:57,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:51:57,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050923285] [2022-11-25 17:51:57,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:51:57,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:51:57,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:57,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:51:57,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:51:57,993 INFO L87 Difference]: Start difference. First operand 2362 states and 3292 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 17:51:59,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:51:59,911 INFO L93 Difference]: Finished difference Result 5385 states and 7826 transitions. [2022-11-25 17:51:59,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:51:59,912 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2022-11-25 17:51:59,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:51:59,937 INFO L225 Difference]: With dead ends: 5385 [2022-11-25 17:51:59,938 INFO L226 Difference]: Without dead ends: 4119 [2022-11-25 17:51:59,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:51:59,943 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 665 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:51:59,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 1314 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1335 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 17:51:59,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4119 states. [2022-11-25 17:52:00,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4119 to 3463. [2022-11-25 17:52:00,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3463 states, 3030 states have (on average 1.4191419141914192) internal successors, (4300), 3065 states have internal predecessors, (4300), 260 states have call successors, (260), 146 states have call predecessors, (260), 171 states have return successors, (396), 267 states have call predecessors, (396), 257 states have call successors, (396) [2022-11-25 17:52:00,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3463 states to 3463 states and 4956 transitions. [2022-11-25 17:52:00,493 INFO L78 Accepts]: Start accepts. Automaton has 3463 states and 4956 transitions. Word has length 80 [2022-11-25 17:52:00,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:52:00,493 INFO L495 AbstractCegarLoop]: Abstraction has 3463 states and 4956 transitions. [2022-11-25 17:52:00,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 17:52:00,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3463 states and 4956 transitions. [2022-11-25 17:52:00,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-25 17:52:00,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:52:00,498 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:00,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 17:52:00,499 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:52:00,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:00,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1251030868, now seen corresponding path program 1 times [2022-11-25 17:52:00,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:00,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509165335] [2022-11-25 17:52:00,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:00,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:00,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-25 17:52:00,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:00,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 17:52:00,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:00,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 17:52:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:00,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-25 17:52:00,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:00,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-25 17:52:00,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:00,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:00,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509165335] [2022-11-25 17:52:00,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509165335] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:00,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:52:00,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 17:52:00,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388354498] [2022-11-25 17:52:00,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:00,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:52:00,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:00,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:52:00,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:52:00,599 INFO L87 Difference]: Start difference. First operand 3463 states and 4956 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 17:52:02,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:52:02,487 INFO L93 Difference]: Finished difference Result 9041 states and 13314 transitions. [2022-11-25 17:52:02,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:52:02,488 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2022-11-25 17:52:02,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:52:02,528 INFO L225 Difference]: With dead ends: 9041 [2022-11-25 17:52:02,528 INFO L226 Difference]: Without dead ends: 6675 [2022-11-25 17:52:02,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:52:02,539 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 841 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:52:02,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [872 Valid, 969 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1064 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 17:52:02,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6675 states. [2022-11-25 17:52:03,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6675 to 5654. [2022-11-25 17:52:03,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5654 states, 4914 states have (on average 1.426943426943427) internal successors, (7012), 4982 states have internal predecessors, (7012), 449 states have call successors, (449), 248 states have call predecessors, (449), 289 states have return successors, (667), 439 states have call predecessors, (667), 446 states have call successors, (667) [2022-11-25 17:52:03,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5654 states to 5654 states and 8128 transitions. [2022-11-25 17:52:03,383 INFO L78 Accepts]: Start accepts. Automaton has 5654 states and 8128 transitions. Word has length 80 [2022-11-25 17:52:03,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:52:03,384 INFO L495 AbstractCegarLoop]: Abstraction has 5654 states and 8128 transitions. [2022-11-25 17:52:03,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 17:52:03,384 INFO L276 IsEmpty]: Start isEmpty. Operand 5654 states and 8128 transitions. [2022-11-25 17:52:03,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-25 17:52:03,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:52:03,390 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-25 17:52:03,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 17:52:03,391 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:52:03,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:03,392 INFO L85 PathProgramCache]: Analyzing trace with hash -2050145287, now seen corresponding path program 1 times [2022-11-25 17:52:03,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:03,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416758517] [2022-11-25 17:52:03,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:03,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:03,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:03,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-25 17:52:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:03,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 17:52:03,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:03,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-25 17:52:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:03,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-25 17:52:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:03,501 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 17:52:03,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:03,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416758517] [2022-11-25 17:52:03,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416758517] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:03,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382089734] [2022-11-25 17:52:03,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:03,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:03,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:03,503 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:03,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:52:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:03,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:52:03,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:03,656 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 17:52:03,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:52:03,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382089734] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:03,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:52:03,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-25 17:52:03,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108385909] [2022-11-25 17:52:03,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:03,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:52:03,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:03,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:52:03,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:52:03,659 INFO L87 Difference]: Start difference. First operand 5654 states and 8128 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 17:52:04,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:52:04,124 INFO L93 Difference]: Finished difference Result 6377 states and 9066 transitions. [2022-11-25 17:52:04,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:52:04,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2022-11-25 17:52:04,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:52:04,165 INFO L225 Difference]: With dead ends: 6377 [2022-11-25 17:52:04,165 INFO L226 Difference]: Without dead ends: 5532 [2022-11-25 17:52:04,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:52:04,170 INFO L413 NwaCegarLoop]: 360 mSDtfsCounter, 289 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:52:04,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 435 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:52:04,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5532 states. [2022-11-25 17:52:04,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5532 to 5517. [2022-11-25 17:52:04,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5517 states, 4793 states have (on average 1.430002086375965) internal successors, (6854), 4860 states have internal predecessors, (6854), 441 states have call successors, (441), 242 states have call predecessors, (441), 281 states have return successors, (653), 430 states have call predecessors, (653), 438 states have call successors, (653) [2022-11-25 17:52:04,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5517 states to 5517 states and 7948 transitions. [2022-11-25 17:52:04,960 INFO L78 Accepts]: Start accepts. Automaton has 5517 states and 7948 transitions. Word has length 88 [2022-11-25 17:52:04,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:52:04,961 INFO L495 AbstractCegarLoop]: Abstraction has 5517 states and 7948 transitions. [2022-11-25 17:52:04,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 17:52:04,961 INFO L276 IsEmpty]: Start isEmpty. Operand 5517 states and 7948 transitions. [2022-11-25 17:52:04,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-25 17:52:04,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:52:04,968 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 17:52:04,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:05,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:05,175 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:52:05,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:05,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1393815741, now seen corresponding path program 1 times [2022-11-25 17:52:05,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:05,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900430722] [2022-11-25 17:52:05,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:05,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:05,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-25 17:52:05,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:05,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 17:52:05,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:05,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-25 17:52:05,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:05,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-25 17:52:05,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:05,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-25 17:52:05,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:05,304 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-25 17:52:05,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:05,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900430722] [2022-11-25 17:52:05,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900430722] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:05,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592754976] [2022-11-25 17:52:05,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:05,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:05,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:05,307 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:05,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:52:05,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:05,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 17:52:05,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:05,454 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 17:52:05,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:52:05,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592754976] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:05,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:52:05,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-25 17:52:05,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091333857] [2022-11-25 17:52:05,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:05,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:52:05,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:05,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:52:05,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:52:05,461 INFO L87 Difference]: Start difference. First operand 5517 states and 7948 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-25 17:52:05,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:52:05,957 INFO L93 Difference]: Finished difference Result 5896 states and 8416 transitions. [2022-11-25 17:52:05,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:52:05,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2022-11-25 17:52:05,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:52:05,977 INFO L225 Difference]: With dead ends: 5896 [2022-11-25 17:52:05,977 INFO L226 Difference]: Without dead ends: 4570 [2022-11-25 17:52:05,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:52:05,982 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 62 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:52:05,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 678 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:52:05,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4570 states. [2022-11-25 17:52:06,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4570 to 4570. [2022-11-25 17:52:06,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4570 states, 3949 states have (on average 1.467713345150671) internal successors, (5796), 4000 states have internal predecessors, (5796), 384 states have call successors, (384), 205 states have call predecessors, (384), 236 states have return successors, (561), 380 states have call predecessors, (561), 382 states have call successors, (561) [2022-11-25 17:52:06,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4570 states to 4570 states and 6741 transitions. [2022-11-25 17:52:06,654 INFO L78 Accepts]: Start accepts. Automaton has 4570 states and 6741 transitions. Word has length 103 [2022-11-25 17:52:06,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:52:06,655 INFO L495 AbstractCegarLoop]: Abstraction has 4570 states and 6741 transitions. [2022-11-25 17:52:06,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-25 17:52:06,655 INFO L276 IsEmpty]: Start isEmpty. Operand 4570 states and 6741 transitions. [2022-11-25 17:52:06,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-25 17:52:06,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:52:06,677 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:06,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:06,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 17:52:06,883 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:52:06,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:06,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1875014099, now seen corresponding path program 1 times [2022-11-25 17:52:06,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:06,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683427860] [2022-11-25 17:52:06,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:06,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:06,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-25 17:52:06,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:06,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 17:52:06,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:06,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 17:52:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:07,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-25 17:52:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:07,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-25 17:52:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:07,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-25 17:52:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:07,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-25 17:52:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:07,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-25 17:52:07,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:07,064 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 17:52:07,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:07,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683427860] [2022-11-25 17:52:07,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683427860] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:07,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476493870] [2022-11-25 17:52:07,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:07,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:07,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:07,067 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:07,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:52:07,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:07,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 17:52:07,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:07,276 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 17:52:07,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:52:07,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476493870] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:07,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:52:07,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-11-25 17:52:07,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764071301] [2022-11-25 17:52:07,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:07,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:52:07,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:07,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:52:07,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:52:07,279 INFO L87 Difference]: Start difference. First operand 4570 states and 6741 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 17:52:08,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:52:08,188 INFO L93 Difference]: Finished difference Result 13561 states and 20149 transitions. [2022-11-25 17:52:08,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:52:08,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2022-11-25 17:52:08,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:52:08,225 INFO L225 Difference]: With dead ends: 13561 [2022-11-25 17:52:08,225 INFO L226 Difference]: Without dead ends: 9004 [2022-11-25 17:52:08,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:52:08,241 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 189 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:52:08,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 453 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:52:08,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9004 states. [2022-11-25 17:52:09,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9004 to 8932. [2022-11-25 17:52:09,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8932 states, 7715 states have (on average 1.4650680492546986) internal successors, (11303), 7815 states have internal predecessors, (11303), 744 states have call successors, (744), 409 states have call predecessors, (744), 472 states have return successors, (1085), 723 states have call predecessors, (1085), 742 states have call successors, (1085) [2022-11-25 17:52:09,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8932 states to 8932 states and 13132 transitions. [2022-11-25 17:52:09,164 INFO L78 Accepts]: Start accepts. Automaton has 8932 states and 13132 transitions. Word has length 129 [2022-11-25 17:52:09,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:52:09,165 INFO L495 AbstractCegarLoop]: Abstraction has 8932 states and 13132 transitions. [2022-11-25 17:52:09,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 17:52:09,165 INFO L276 IsEmpty]: Start isEmpty. Operand 8932 states and 13132 transitions. [2022-11-25 17:52:09,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-25 17:52:09,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:52:09,181 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:09,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:09,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 17:52:09,387 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:52:09,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:09,387 INFO L85 PathProgramCache]: Analyzing trace with hash -505710771, now seen corresponding path program 1 times [2022-11-25 17:52:09,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:09,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939685941] [2022-11-25 17:52:09,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:09,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:09,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-25 17:52:09,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:09,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 17:52:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:09,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 17:52:09,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:09,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-25 17:52:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:09,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-25 17:52:09,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:09,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-25 17:52:09,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:09,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-25 17:52:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:09,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-25 17:52:09,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:09,556 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 17:52:09,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:09,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939685941] [2022-11-25 17:52:09,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939685941] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:09,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352554053] [2022-11-25 17:52:09,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:09,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:09,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:09,560 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:09,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:52:09,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:09,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 17:52:09,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:09,722 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 17:52:09,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:52:09,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352554053] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:09,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:52:09,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-25 17:52:09,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323713590] [2022-11-25 17:52:09,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:09,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:52:09,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:09,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:52:09,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:52:09,726 INFO L87 Difference]: Start difference. First operand 8932 states and 13132 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 17:52:11,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:52:11,814 INFO L93 Difference]: Finished difference Result 26125 states and 38794 transitions. [2022-11-25 17:52:11,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:52:11,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 129 [2022-11-25 17:52:11,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:52:11,883 INFO L225 Difference]: With dead ends: 26125 [2022-11-25 17:52:11,883 INFO L226 Difference]: Without dead ends: 17207 [2022-11-25 17:52:11,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:52:11,906 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 192 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:52:11,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 666 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:52:11,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17207 states. [2022-11-25 17:52:13,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17207 to 17207. [2022-11-25 17:52:13,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17207 states, 14845 states have (on average 1.453553384978107) internal successors, (21578), 15010 states have internal predecessors, (21578), 1417 states have call successors, (1417), 817 states have call predecessors, (1417), 944 states have return successors, (2364), 1411 states have call predecessors, (2364), 1415 states have call successors, (2364) [2022-11-25 17:52:13,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17207 states to 17207 states and 25359 transitions. [2022-11-25 17:52:13,431 INFO L78 Accepts]: Start accepts. Automaton has 17207 states and 25359 transitions. Word has length 129 [2022-11-25 17:52:13,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:52:13,431 INFO L495 AbstractCegarLoop]: Abstraction has 17207 states and 25359 transitions. [2022-11-25 17:52:13,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 17:52:13,432 INFO L276 IsEmpty]: Start isEmpty. Operand 17207 states and 25359 transitions. [2022-11-25 17:52:13,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-25 17:52:13,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:52:13,475 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:13,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:13,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:13,681 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:52:13,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:13,681 INFO L85 PathProgramCache]: Analyzing trace with hash -55509300, now seen corresponding path program 1 times [2022-11-25 17:52:13,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:13,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709084140] [2022-11-25 17:52:13,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:13,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:13,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:13,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-25 17:52:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:13,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 17:52:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:13,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 17:52:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:13,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-25 17:52:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:13,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-25 17:52:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:13,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-25 17:52:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:13,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-25 17:52:13,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:13,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-25 17:52:13,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:13,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-25 17:52:13,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:13,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-11-25 17:52:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:13,863 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 17:52:13,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:13,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709084140] [2022-11-25 17:52:13,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709084140] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:13,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67452151] [2022-11-25 17:52:13,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:13,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:13,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:13,866 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:13,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:52:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:14,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 17:52:14,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 17:52:14,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:52:14,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67452151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:14,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:52:14,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-11-25 17:52:14,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939614639] [2022-11-25 17:52:14,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:14,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:52:14,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:14,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:52:14,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:52:14,215 INFO L87 Difference]: Start difference. First operand 17207 states and 25359 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-25 17:52:17,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:52:17,922 INFO L93 Difference]: Finished difference Result 50829 states and 75468 transitions. [2022-11-25 17:52:17,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:52:17,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 167 [2022-11-25 17:52:17,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:52:18,059 INFO L225 Difference]: With dead ends: 50829 [2022-11-25 17:52:18,060 INFO L226 Difference]: Without dead ends: 33641 [2022-11-25 17:52:18,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:52:18,114 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 137 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:52:18,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 453 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:52:18,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33641 states. [2022-11-25 17:52:21,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33641 to 33365. [2022-11-25 17:52:21,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33365 states, 28835 states have (on average 1.4526096757412865) internal successors, (41886), 29162 states have internal predecessors, (41886), 2665 states have call successors, (2665), 1609 states have call predecessors, (2665), 1864 states have return successors, (4438), 2625 states have call predecessors, (4438), 2663 states have call successors, (4438) [2022-11-25 17:52:21,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33365 states to 33365 states and 48989 transitions. [2022-11-25 17:52:21,952 INFO L78 Accepts]: Start accepts. Automaton has 33365 states and 48989 transitions. Word has length 167 [2022-11-25 17:52:21,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:52:21,953 INFO L495 AbstractCegarLoop]: Abstraction has 33365 states and 48989 transitions. [2022-11-25 17:52:21,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-25 17:52:21,953 INFO L276 IsEmpty]: Start isEmpty. Operand 33365 states and 48989 transitions. [2022-11-25 17:52:22,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-25 17:52:22,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:52:22,186 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:22,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:22,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:22,393 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:52:22,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:22,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1699287564, now seen corresponding path program 1 times [2022-11-25 17:52:22,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:22,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405625122] [2022-11-25 17:52:22,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:22,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:22,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:22,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-25 17:52:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:22,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 17:52:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:22,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 17:52:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:22,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-25 17:52:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:22,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-25 17:52:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:22,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-25 17:52:22,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:22,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-25 17:52:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:22,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-11-25 17:52:22,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:22,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-25 17:52:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:22,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-11-25 17:52:22,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:22,572 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 17:52:22,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:22,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405625122] [2022-11-25 17:52:22,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405625122] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:22,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60463293] [2022-11-25 17:52:22,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:22,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:22,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:22,576 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:22,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:52:22,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:22,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 17:52:22,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:22,903 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 17:52:22,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:52:22,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60463293] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:22,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:52:22,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-11-25 17:52:22,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854724295] [2022-11-25 17:52:22,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:22,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:52:22,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:22,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:52:22,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:52:22,906 INFO L87 Difference]: Start difference. First operand 33365 states and 48989 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-25 17:52:28,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:52:28,653 INFO L93 Difference]: Finished difference Result 99001 states and 146492 transitions. [2022-11-25 17:52:28,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:52:28,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 167 [2022-11-25 17:52:28,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:52:28,929 INFO L225 Difference]: With dead ends: 99001 [2022-11-25 17:52:28,929 INFO L226 Difference]: Without dead ends: 65655 [2022-11-25 17:52:29,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:52:29,023 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 139 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:52:29,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 456 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:52:29,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65655 states. [2022-11-25 17:52:35,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65655 to 65107. [2022-11-25 17:52:35,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65107 states, 56253 states have (on average 1.4493804774856451) internal successors, (81532), 56904 states have internal predecessors, (81532), 5151 states have call successors, (5151), 3191 states have call predecessors, (5151), 3702 states have return successors, (8570), 5043 states have call predecessors, (8570), 5149 states have call successors, (8570) [2022-11-25 17:52:35,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65107 states to 65107 states and 95253 transitions. [2022-11-25 17:52:35,987 INFO L78 Accepts]: Start accepts. Automaton has 65107 states and 95253 transitions. Word has length 167 [2022-11-25 17:52:35,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:52:35,988 INFO L495 AbstractCegarLoop]: Abstraction has 65107 states and 95253 transitions. [2022-11-25 17:52:35,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-25 17:52:35,988 INFO L276 IsEmpty]: Start isEmpty. Operand 65107 states and 95253 transitions. [2022-11-25 17:52:36,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-11-25 17:52:36,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:52:36,326 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:36,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:36,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:36,531 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:52:36,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:36,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1486876546, now seen corresponding path program 1 times [2022-11-25 17:52:36,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:36,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042425222] [2022-11-25 17:52:36,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:36,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:36,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-25 17:52:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:36,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 17:52:36,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:36,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 17:52:36,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:36,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-25 17:52:36,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:36,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-25 17:52:36,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:36,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-25 17:52:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:36,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-25 17:52:36,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:36,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-25 17:52:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:36,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-11-25 17:52:36,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:36,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-25 17:52:36,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:36,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-11-25 17:52:36,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:36,716 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-25 17:52:36,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:36,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042425222] [2022-11-25 17:52:36,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042425222] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:36,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979278120] [2022-11-25 17:52:36,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:36,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:36,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:36,718 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:36,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1857b0d-7444-44b1-a830-57cdde0d2b85/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:52:36,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:36,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 17:52:36,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:36,962 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-25 17:52:36,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:52:36,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979278120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:36,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:52:36,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-25 17:52:36,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572399237] [2022-11-25 17:52:36,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:36,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:52:36,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:36,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:52:36,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:52:36,965 INFO L87 Difference]: Start difference. First operand 65107 states and 95253 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10)