./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label53.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/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_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label53.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/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_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/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 2c75028c45c8bfe0f1d4af80312d164394cbdbf8280624d50449e86195205937 --- 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 16:42:33,236 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 16:42:33,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 16:42:33,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 16:42:33,279 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 16:42:33,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 16:42:33,293 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 16:42:33,298 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 16:42:33,300 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 16:42:33,305 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 16:42:33,306 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 16:42:33,308 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 16:42:33,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 16:42:33,311 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 16:42:33,312 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 16:42:33,314 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 16:42:33,315 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 16:42:33,316 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 16:42:33,318 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 16:42:33,323 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 16:42:33,325 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 16:42:33,328 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 16:42:33,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 16:42:33,330 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 16:42:33,338 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 16:42:33,340 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 16:42:33,340 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 16:42:33,342 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 16:42:33,343 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 16:42:33,345 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 16:42:33,345 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 16:42:33,346 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 16:42:33,348 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 16:42:33,350 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 16:42:33,352 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 16:42:33,352 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 16:42:33,353 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 16:42:33,353 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 16:42:33,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 16:42:33,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 16:42:33,356 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 16:42:33,357 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 16:42:33,396 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 16:42:33,396 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 16:42:33,397 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 16:42:33,397 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 16:42:33,398 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 16:42:33,399 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 16:42:33,399 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 16:42:33,400 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 16:42:33,400 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 16:42:33,400 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 16:42:33,401 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 16:42:33,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 16:42:33,402 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 16:42:33,402 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 16:42:33,402 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 16:42:33,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 16:42:33,403 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 16:42:33,403 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 16:42:33,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 16:42:33,404 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 16:42:33,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 16:42:33,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 16:42:33,405 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 16:42:33,405 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 16:42:33,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:42:33,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 16:42:33,406 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 16:42:33,406 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 16:42:33,406 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 16:42:33,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 16:42:33,407 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 16:42:33,407 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 16:42:33,408 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 16:42:33,408 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 16:42:33,408 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_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2c75028c45c8bfe0f1d4af80312d164394cbdbf8280624d50449e86195205937 [2022-11-25 16:42:33,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 16:42:33,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 16:42:33,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 16:42:33,764 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 16:42:33,764 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 16:42:33,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/eca-rers2012/Problem03_label53.c [2022-11-25 16:42:36,988 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 16:42:37,412 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 16:42:37,413 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/sv-benchmarks/c/eca-rers2012/Problem03_label53.c [2022-11-25 16:42:37,432 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/bin/uautomizer-ZsLfNo2U6R/data/88d9a41bd/52e6b7e6823341d4b4dfa8d7ece30aa5/FLAGfc0816bfb [2022-11-25 16:42:37,452 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/bin/uautomizer-ZsLfNo2U6R/data/88d9a41bd/52e6b7e6823341d4b4dfa8d7ece30aa5 [2022-11-25 16:42:37,455 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 16:42:37,457 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 16:42:37,460 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 16:42:37,460 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 16:42:37,464 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 16:42:37,465 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:42:37" (1/1) ... [2022-11-25 16:42:37,466 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@489e5030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:37, skipping insertion in model container [2022-11-25 16:42:37,466 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:42:37" (1/1) ... [2022-11-25 16:42:37,474 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 16:42:37,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 16:42:38,208 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_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/sv-benchmarks/c/eca-rers2012/Problem03_label53.c[60419,60432] [2022-11-25 16:42:38,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:42:38,250 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 16:42:38,490 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_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/sv-benchmarks/c/eca-rers2012/Problem03_label53.c[60419,60432] [2022-11-25 16:42:38,500 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:42:38,517 INFO L208 MainTranslator]: Completed translation [2022-11-25 16:42:38,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:38 WrapperNode [2022-11-25 16:42:38,519 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 16:42:38,520 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 16:42:38,520 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 16:42:38,520 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 16:42:38,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:38" (1/1) ... [2022-11-25 16:42:38,575 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:38" (1/1) ... [2022-11-25 16:42:38,683 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-11-25 16:42:38,684 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 16:42:38,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 16:42:38,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 16:42:38,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 16:42:38,702 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:38" (1/1) ... [2022-11-25 16:42:38,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:38" (1/1) ... [2022-11-25 16:42:38,711 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:38" (1/1) ... [2022-11-25 16:42:38,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:38" (1/1) ... [2022-11-25 16:42:38,782 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:38" (1/1) ... [2022-11-25 16:42:38,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:38" (1/1) ... [2022-11-25 16:42:38,798 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:38" (1/1) ... [2022-11-25 16:42:38,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:38" (1/1) ... [2022-11-25 16:42:38,820 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 16:42:38,821 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 16:42:38,821 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 16:42:38,821 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 16:42:38,822 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:38" (1/1) ... [2022-11-25 16:42:38,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:42:38,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:38,852 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 16:42:38,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 16:42:38,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 16:42:38,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 16:42:38,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 16:42:38,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 16:42:38,996 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 16:42:38,999 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 16:42:40,941 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 16:42:40,950 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 16:42:40,951 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 16:42:40,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:42:40 BoogieIcfgContainer [2022-11-25 16:42:40,953 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 16:42:40,956 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 16:42:40,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 16:42:40,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 16:42:40,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 04:42:37" (1/3) ... [2022-11-25 16:42:40,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38409848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:42:40, skipping insertion in model container [2022-11-25 16:42:40,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:42:38" (2/3) ... [2022-11-25 16:42:40,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38409848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:42:40, skipping insertion in model container [2022-11-25 16:42:40,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:42:40" (3/3) ... [2022-11-25 16:42:40,962 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label53.c [2022-11-25 16:42:40,981 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 16:42:40,982 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 16:42:41,038 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:42:41,044 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;@68616a45, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:42:41,045 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 16:42:41,051 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:41,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-25 16:42:41,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:41,067 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:42:41,068 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:41,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:41,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1022353686, now seen corresponding path program 1 times [2022-11-25 16:42:41,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:41,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094912474] [2022-11-25 16:42:41,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:41,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:41,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:41,991 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 16:42:41,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:41,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094912474] [2022-11-25 16:42:41,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094912474] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:41,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:41,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:42:41,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307837978] [2022-11-25 16:42:41,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:42,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:42:42,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:42,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:42:42,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:42,044 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:43,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:43,453 INFO L93 Difference]: Finished difference Result 829 states and 1478 transitions. [2022-11-25 16:42:43,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:42:43,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2022-11-25 16:42:43,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:43,471 INFO L225 Difference]: With dead ends: 829 [2022-11-25 16:42:43,471 INFO L226 Difference]: Without dead ends: 463 [2022-11-25 16:42:43,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:43,478 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 97 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:43,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 127 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-25 16:42:43,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-11-25 16:42:43,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 449. [2022-11-25 16:42:43,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.6183035714285714) internal successors, (725), 448 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:43,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 725 transitions. [2022-11-25 16:42:43,545 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 725 transitions. Word has length 194 [2022-11-25 16:42:43,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:43,547 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 725 transitions. [2022-11-25 16:42:43,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:43,548 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 725 transitions. [2022-11-25 16:42:43,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-25 16:42:43,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:43,553 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:42:43,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 16:42:43,554 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:43,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:43,555 INFO L85 PathProgramCache]: Analyzing trace with hash 701641658, now seen corresponding path program 1 times [2022-11-25 16:42:43,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:43,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694030140] [2022-11-25 16:42:43,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:43,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:43,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:43,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:43,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:43,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694030140] [2022-11-25 16:42:43,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694030140] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:43,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:43,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:42:43,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510935378] [2022-11-25 16:42:43,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:43,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:42:43,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:43,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:42:43,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:43,870 INFO L87 Difference]: Start difference. First operand 449 states and 725 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:44,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:44,855 INFO L93 Difference]: Finished difference Result 1319 states and 2138 transitions. [2022-11-25 16:42:44,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:42:44,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2022-11-25 16:42:44,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:44,860 INFO L225 Difference]: With dead ends: 1319 [2022-11-25 16:42:44,860 INFO L226 Difference]: Without dead ends: 872 [2022-11-25 16:42:44,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:44,866 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 249 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:44,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 150 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 16:42:44,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2022-11-25 16:42:44,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 870. [2022-11-25 16:42:44,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 1.5120828538550057) internal successors, (1314), 869 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:44,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1314 transitions. [2022-11-25 16:42:44,924 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1314 transitions. Word has length 199 [2022-11-25 16:42:44,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:44,926 INFO L495 AbstractCegarLoop]: Abstraction has 870 states and 1314 transitions. [2022-11-25 16:42:44,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:44,927 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1314 transitions. [2022-11-25 16:42:44,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-11-25 16:42:44,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:44,939 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:42:44,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 16:42:44,940 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:44,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:44,941 INFO L85 PathProgramCache]: Analyzing trace with hash -2127492304, now seen corresponding path program 1 times [2022-11-25 16:42:44,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:44,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766604068] [2022-11-25 16:42:44,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:44,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 16:42:45,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:45,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766604068] [2022-11-25 16:42:45,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766604068] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:45,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:45,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:42:45,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231045998] [2022-11-25 16:42:45,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:45,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:42:45,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:45,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:42:45,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:45,395 INFO L87 Difference]: Start difference. First operand 870 states and 1314 transitions. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:46,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:46,369 INFO L93 Difference]: Finished difference Result 2554 states and 3869 transitions. [2022-11-25 16:42:46,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:42:46,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 214 [2022-11-25 16:42:46,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:46,376 INFO L225 Difference]: With dead ends: 2554 [2022-11-25 16:42:46,376 INFO L226 Difference]: Without dead ends: 1686 [2022-11-25 16:42:46,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:46,379 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 232 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:46,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 417 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 16:42:46,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2022-11-25 16:42:46,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 1684. [2022-11-25 16:42:46,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 1.3363042186571599) internal successors, (2249), 1683 states have internal predecessors, (2249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:46,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 2249 transitions. [2022-11-25 16:42:46,441 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 2249 transitions. Word has length 214 [2022-11-25 16:42:46,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:46,441 INFO L495 AbstractCegarLoop]: Abstraction has 1684 states and 2249 transitions. [2022-11-25 16:42:46,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:46,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 2249 transitions. [2022-11-25 16:42:46,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-11-25 16:42:46,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:46,449 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:42:46,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 16:42:46,449 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:46,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:46,451 INFO L85 PathProgramCache]: Analyzing trace with hash -453762803, now seen corresponding path program 1 times [2022-11-25 16:42:46,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:46,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747253410] [2022-11-25 16:42:46,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:46,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:46,864 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:46,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:46,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747253410] [2022-11-25 16:42:46,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747253410] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:46,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:46,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:42:46,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419320638] [2022-11-25 16:42:46,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:46,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:42:46,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:46,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:42:46,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:46,868 INFO L87 Difference]: Start difference. First operand 1684 states and 2249 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:47,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:47,875 INFO L93 Difference]: Finished difference Result 5017 states and 6707 transitions. [2022-11-25 16:42:47,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:42:47,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 217 [2022-11-25 16:42:47,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:47,888 INFO L225 Difference]: With dead ends: 5017 [2022-11-25 16:42:47,890 INFO L226 Difference]: Without dead ends: 3335 [2022-11-25 16:42:47,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:47,901 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 259 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:47,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 123 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 16:42:47,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3335 states. [2022-11-25 16:42:47,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3335 to 3326. [2022-11-25 16:42:47,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3326 states, 3325 states have (on average 1.3230075187969925) internal successors, (4399), 3325 states have internal predecessors, (4399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:47,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3326 states to 3326 states and 4399 transitions. [2022-11-25 16:42:47,982 INFO L78 Accepts]: Start accepts. Automaton has 3326 states and 4399 transitions. Word has length 217 [2022-11-25 16:42:47,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:47,982 INFO L495 AbstractCegarLoop]: Abstraction has 3326 states and 4399 transitions. [2022-11-25 16:42:47,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:47,983 INFO L276 IsEmpty]: Start isEmpty. Operand 3326 states and 4399 transitions. [2022-11-25 16:42:47,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-11-25 16:42:47,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:47,991 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:42:47,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 16:42:47,991 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:47,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:47,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1946130827, now seen corresponding path program 1 times [2022-11-25 16:42:47,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:47,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139962819] [2022-11-25 16:42:47,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:47,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:42:48,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:48,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139962819] [2022-11-25 16:42:48,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139962819] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:48,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:48,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:42:48,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679321420] [2022-11-25 16:42:48,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:48,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:42:48,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:48,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:42:48,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:48,315 INFO L87 Difference]: Start difference. First operand 3326 states and 4399 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:49,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:49,248 INFO L93 Difference]: Finished difference Result 9926 states and 13144 transitions. [2022-11-25 16:42:49,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:42:49,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 220 [2022-11-25 16:42:49,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:49,273 INFO L225 Difference]: With dead ends: 9926 [2022-11-25 16:42:49,273 INFO L226 Difference]: Without dead ends: 6602 [2022-11-25 16:42:49,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:49,283 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 217 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:49,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 168 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 16:42:49,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6602 states. [2022-11-25 16:42:49,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6602 to 5768. [2022-11-25 16:42:49,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5768 states, 5767 states have (on average 1.33674354083579) internal successors, (7709), 5767 states have internal predecessors, (7709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:49,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5768 states to 5768 states and 7709 transitions. [2022-11-25 16:42:49,454 INFO L78 Accepts]: Start accepts. Automaton has 5768 states and 7709 transitions. Word has length 220 [2022-11-25 16:42:49,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:49,454 INFO L495 AbstractCegarLoop]: Abstraction has 5768 states and 7709 transitions. [2022-11-25 16:42:49,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:49,455 INFO L276 IsEmpty]: Start isEmpty. Operand 5768 states and 7709 transitions. [2022-11-25 16:42:49,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-11-25 16:42:49,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:49,467 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:42:49,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 16:42:49,467 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:49,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:49,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1028842456, now seen corresponding path program 1 times [2022-11-25 16:42:49,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:49,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358500120] [2022-11-25 16:42:49,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:49,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 16:42:49,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:49,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358500120] [2022-11-25 16:42:49,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358500120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:49,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:49,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:42:49,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728181430] [2022-11-25 16:42:49,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:49,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:42:49,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:49,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:42:49,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:49,965 INFO L87 Difference]: Start difference. First operand 5768 states and 7709 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:51,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:51,054 INFO L93 Difference]: Finished difference Result 15634 states and 21101 transitions. [2022-11-25 16:42:51,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:42:51,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 237 [2022-11-25 16:42:51,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:51,087 INFO L225 Difference]: With dead ends: 15634 [2022-11-25 16:42:51,087 INFO L226 Difference]: Without dead ends: 9868 [2022-11-25 16:42:51,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:51,095 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 211 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:51,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 188 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 16:42:51,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9868 states. [2022-11-25 16:42:51,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9868 to 9643. [2022-11-25 16:42:51,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9643 states, 9642 states have (on average 1.356461315079859) internal successors, (13079), 9642 states have internal predecessors, (13079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:51,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9643 states to 9643 states and 13079 transitions. [2022-11-25 16:42:51,389 INFO L78 Accepts]: Start accepts. Automaton has 9643 states and 13079 transitions. Word has length 237 [2022-11-25 16:42:51,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:51,390 INFO L495 AbstractCegarLoop]: Abstraction has 9643 states and 13079 transitions. [2022-11-25 16:42:51,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:51,390 INFO L276 IsEmpty]: Start isEmpty. Operand 9643 states and 13079 transitions. [2022-11-25 16:42:51,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-11-25 16:42:51,414 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:51,414 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:42:51,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 16:42:51,415 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:51,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:51,415 INFO L85 PathProgramCache]: Analyzing trace with hash 694768098, now seen corresponding path program 1 times [2022-11-25 16:42:51,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:51,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252477122] [2022-11-25 16:42:51,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:51,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:51,976 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 16:42:51,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:51,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252477122] [2022-11-25 16:42:51,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252477122] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:51,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:51,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:42:51,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837541778] [2022-11-25 16:42:51,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:51,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:42:51,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:51,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:42:51,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:51,979 INFO L87 Difference]: Start difference. First operand 9643 states and 13079 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 2 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:53,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:53,065 INFO L93 Difference]: Finished difference Result 22544 states and 30610 transitions. [2022-11-25 16:42:53,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:42:53,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 2 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2022-11-25 16:42:53,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:53,100 INFO L225 Difference]: With dead ends: 22544 [2022-11-25 16:42:53,101 INFO L226 Difference]: Without dead ends: 12903 [2022-11-25 16:42:53,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:53,112 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 204 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:53,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 173 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 16:42:53,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12903 states. [2022-11-25 16:42:53,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12903 to 12891. [2022-11-25 16:42:53,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12891 states, 12890 states have (on average 1.3324282389449185) internal successors, (17175), 12890 states have internal predecessors, (17175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:53,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12891 states to 12891 states and 17175 transitions. [2022-11-25 16:42:53,419 INFO L78 Accepts]: Start accepts. Automaton has 12891 states and 17175 transitions. Word has length 239 [2022-11-25 16:42:53,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:53,419 INFO L495 AbstractCegarLoop]: Abstraction has 12891 states and 17175 transitions. [2022-11-25 16:42:53,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 2 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:53,421 INFO L276 IsEmpty]: Start isEmpty. Operand 12891 states and 17175 transitions. [2022-11-25 16:42:53,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-11-25 16:42:53,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:53,440 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:42:53,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 16:42:53,441 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:53,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:53,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1975885463, now seen corresponding path program 1 times [2022-11-25 16:42:53,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:53,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278511935] [2022-11-25 16:42:53,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:53,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:54,073 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 16:42:54,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:54,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278511935] [2022-11-25 16:42:54,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278511935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:54,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:54,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:42:54,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963318617] [2022-11-25 16:42:54,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:54,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:42:54,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:54,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:42:54,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:54,076 INFO L87 Difference]: Start difference. First operand 12891 states and 17175 transitions. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:55,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:55,226 INFO L93 Difference]: Finished difference Result 28632 states and 37901 transitions. [2022-11-25 16:42:55,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:42:55,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 240 [2022-11-25 16:42:55,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:55,265 INFO L225 Difference]: With dead ends: 28632 [2022-11-25 16:42:55,266 INFO L226 Difference]: Without dead ends: 16353 [2022-11-25 16:42:55,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:55,280 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 205 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:55,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 159 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 16:42:55,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16353 states. [2022-11-25 16:42:55,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16353 to 16350. [2022-11-25 16:42:55,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16350 states, 16349 states have (on average 1.313719493547006) internal successors, (21478), 16349 states have internal predecessors, (21478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:55,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16350 states to 16350 states and 21478 transitions. [2022-11-25 16:42:55,635 INFO L78 Accepts]: Start accepts. Automaton has 16350 states and 21478 transitions. Word has length 240 [2022-11-25 16:42:55,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:55,637 INFO L495 AbstractCegarLoop]: Abstraction has 16350 states and 21478 transitions. [2022-11-25 16:42:55,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:55,638 INFO L276 IsEmpty]: Start isEmpty. Operand 16350 states and 21478 transitions. [2022-11-25 16:42:55,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-11-25 16:42:55,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:55,668 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:42:55,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 16:42:55,669 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:55,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:55,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1128746597, now seen corresponding path program 1 times [2022-11-25 16:42:55,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:55,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841225338] [2022-11-25 16:42:55,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:55,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:55,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 16:42:56,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:56,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841225338] [2022-11-25 16:42:56,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841225338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:56,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:42:56,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:42:56,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527186884] [2022-11-25 16:42:56,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:56,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:42:56,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:56,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:42:56,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:56,036 INFO L87 Difference]: Start difference. First operand 16350 states and 21478 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:57,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:42:57,321 INFO L93 Difference]: Finished difference Result 37380 states and 48886 transitions. [2022-11-25 16:42:57,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:42:57,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2022-11-25 16:42:57,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:42:57,369 INFO L225 Difference]: With dead ends: 37380 [2022-11-25 16:42:57,369 INFO L226 Difference]: Without dead ends: 21642 [2022-11-25 16:42:57,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:42:57,386 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 202 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:42:57,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 424 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 16:42:57,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21642 states. [2022-11-25 16:42:57,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21642 to 21638. [2022-11-25 16:42:57,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21638 states, 21637 states have (on average 1.2715256273975135) internal successors, (27512), 21637 states have internal predecessors, (27512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:57,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21638 states to 21638 states and 27512 transitions. [2022-11-25 16:42:57,863 INFO L78 Accepts]: Start accepts. Automaton has 21638 states and 27512 transitions. Word has length 242 [2022-11-25 16:42:57,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:42:57,864 INFO L495 AbstractCegarLoop]: Abstraction has 21638 states and 27512 transitions. [2022-11-25 16:42:57,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:42:57,864 INFO L276 IsEmpty]: Start isEmpty. Operand 21638 states and 27512 transitions. [2022-11-25 16:42:57,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-11-25 16:42:57,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:42:57,893 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:42:57,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 16:42:57,893 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:42:57,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:42:57,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1372664791, now seen corresponding path program 1 times [2022-11-25 16:42:57,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:42:57,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117643851] [2022-11-25 16:42:57,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:57,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:42:57,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:58,506 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 50 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 16:42:58,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:42:58,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117643851] [2022-11-25 16:42:58,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117643851] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:42:58,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229066501] [2022-11-25 16:42:58,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:42:58,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:42:58,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:42:58,514 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:42:58,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 16:42:58,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:42:58,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 16:42:58,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:42:58,906 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-25 16:42:58,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:42:58,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229066501] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:42:58,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:42:58,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-25 16:42:58,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365433298] [2022-11-25 16:42:58,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:42:58,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:42:58,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:42:58,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:42:58,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:42:58,910 INFO L87 Difference]: Start difference. First operand 21638 states and 27512 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:00,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:00,289 INFO L93 Difference]: Finished difference Result 54472 states and 69458 transitions. [2022-11-25 16:43:00,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:00,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 246 [2022-11-25 16:43:00,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:00,362 INFO L225 Difference]: With dead ends: 54472 [2022-11-25 16:43:00,363 INFO L226 Difference]: Without dead ends: 33039 [2022-11-25 16:43:00,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:43:00,382 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 235 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:00,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 167 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 16:43:00,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33039 states. [2022-11-25 16:43:01,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33039 to 30800. [2022-11-25 16:43:01,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30800 states, 30799 states have (on average 1.2555277768758726) internal successors, (38669), 30799 states have internal predecessors, (38669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:01,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30800 states to 30800 states and 38669 transitions. [2022-11-25 16:43:01,204 INFO L78 Accepts]: Start accepts. Automaton has 30800 states and 38669 transitions. Word has length 246 [2022-11-25 16:43:01,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:01,205 INFO L495 AbstractCegarLoop]: Abstraction has 30800 states and 38669 transitions. [2022-11-25 16:43:01,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:01,206 INFO L276 IsEmpty]: Start isEmpty. Operand 30800 states and 38669 transitions. [2022-11-25 16:43:01,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-11-25 16:43:01,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:01,248 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:43:01,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 16:43:01,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 16:43:01,456 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:01,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:01,457 INFO L85 PathProgramCache]: Analyzing trace with hash 430746202, now seen corresponding path program 1 times [2022-11-25 16:43:01,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:01,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296460669] [2022-11-25 16:43:01,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:01,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:02,070 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 16:43:02,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:02,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296460669] [2022-11-25 16:43:02,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296460669] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:02,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:02,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:43:02,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878500942] [2022-11-25 16:43:02,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:02,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:02,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:02,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:02,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:02,074 INFO L87 Difference]: Start difference. First operand 30800 states and 38669 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:03,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:03,359 INFO L93 Difference]: Finished difference Result 63040 states and 78986 transitions. [2022-11-25 16:43:03,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:03,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 248 [2022-11-25 16:43:03,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:03,420 INFO L225 Difference]: With dead ends: 63040 [2022-11-25 16:43:03,421 INFO L226 Difference]: Without dead ends: 37533 [2022-11-25 16:43:03,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:03,441 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 197 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:03,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 211 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 16:43:03,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37533 states. [2022-11-25 16:43:04,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37533 to 37519. [2022-11-25 16:43:04,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37519 states, 37518 states have (on average 1.2423903193133963) internal successors, (46612), 37518 states have internal predecessors, (46612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:04,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37519 states to 37519 states and 46612 transitions. [2022-11-25 16:43:04,115 INFO L78 Accepts]: Start accepts. Automaton has 37519 states and 46612 transitions. Word has length 248 [2022-11-25 16:43:04,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:04,115 INFO L495 AbstractCegarLoop]: Abstraction has 37519 states and 46612 transitions. [2022-11-25 16:43:04,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:04,116 INFO L276 IsEmpty]: Start isEmpty. Operand 37519 states and 46612 transitions. [2022-11-25 16:43:04,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-11-25 16:43:04,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:04,152 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:43:04,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 16:43:04,153 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:04,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:04,154 INFO L85 PathProgramCache]: Analyzing trace with hash -874828795, now seen corresponding path program 2 times [2022-11-25 16:43:04,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:04,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327233235] [2022-11-25 16:43:04,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:04,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:04,343 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 16:43:04,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:04,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327233235] [2022-11-25 16:43:04,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327233235] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:04,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:04,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:43:04,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55281331] [2022-11-25 16:43:04,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:04,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:04,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:04,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:04,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:04,347 INFO L87 Difference]: Start difference. First operand 37519 states and 46612 transitions. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:05,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:05,162 INFO L93 Difference]: Finished difference Result 105417 states and 131073 transitions. [2022-11-25 16:43:05,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:05,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 255 [2022-11-25 16:43:05,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:05,268 INFO L225 Difference]: With dead ends: 105417 [2022-11-25 16:43:05,268 INFO L226 Difference]: Without dead ends: 70339 [2022-11-25 16:43:05,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:05,291 INFO L413 NwaCegarLoop]: 648 mSDtfsCounter, 332 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:05,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 943 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 16:43:05,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70339 states. [2022-11-25 16:43:06,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70339 to 70336. [2022-11-25 16:43:06,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70336 states, 70335 states have (on average 1.2212838558328) internal successors, (85899), 70335 states have internal predecessors, (85899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:06,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70336 states to 70336 states and 85899 transitions. [2022-11-25 16:43:06,980 INFO L78 Accepts]: Start accepts. Automaton has 70336 states and 85899 transitions. Word has length 255 [2022-11-25 16:43:06,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:06,981 INFO L495 AbstractCegarLoop]: Abstraction has 70336 states and 85899 transitions. [2022-11-25 16:43:06,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:06,981 INFO L276 IsEmpty]: Start isEmpty. Operand 70336 states and 85899 transitions. [2022-11-25 16:43:07,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-11-25 16:43:07,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:07,045 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:43:07,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 16:43:07,046 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:07,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:07,046 INFO L85 PathProgramCache]: Analyzing trace with hash 2121304353, now seen corresponding path program 1 times [2022-11-25 16:43:07,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:07,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808499618] [2022-11-25 16:43:07,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:07,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:07,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 16:43:07,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:07,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808499618] [2022-11-25 16:43:07,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808499618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:07,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:07,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:43:07,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994872551] [2022-11-25 16:43:07,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:07,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:07,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:07,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:07,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:07,501 INFO L87 Difference]: Start difference. First operand 70336 states and 85899 transitions. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:09,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:09,186 INFO L93 Difference]: Finished difference Result 164420 states and 204085 transitions. [2022-11-25 16:43:09,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:09,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 261 [2022-11-25 16:43:09,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:09,302 INFO L225 Difference]: With dead ends: 164420 [2022-11-25 16:43:09,302 INFO L226 Difference]: Without dead ends: 94899 [2022-11-25 16:43:09,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:09,333 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 216 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:09,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 201 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 16:43:09,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94899 states. [2022-11-25 16:43:10,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94899 to 94899. [2022-11-25 16:43:11,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94899 states, 94898 states have (on average 1.175894117895003) internal successors, (111590), 94898 states have internal predecessors, (111590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:11,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94899 states to 94899 states and 111590 transitions. [2022-11-25 16:43:11,145 INFO L78 Accepts]: Start accepts. Automaton has 94899 states and 111590 transitions. Word has length 261 [2022-11-25 16:43:11,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:11,146 INFO L495 AbstractCegarLoop]: Abstraction has 94899 states and 111590 transitions. [2022-11-25 16:43:11,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:11,146 INFO L276 IsEmpty]: Start isEmpty. Operand 94899 states and 111590 transitions. [2022-11-25 16:43:11,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-11-25 16:43:11,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:11,196 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:43:11,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 16:43:11,197 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:11,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:11,197 INFO L85 PathProgramCache]: Analyzing trace with hash -546964361, now seen corresponding path program 1 times [2022-11-25 16:43:11,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:11,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916429446] [2022-11-25 16:43:11,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:11,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:11,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-25 16:43:11,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:11,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916429446] [2022-11-25 16:43:11,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916429446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:11,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:11,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:43:11,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126858171] [2022-11-25 16:43:11,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:11,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:11,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:11,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:11,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:11,833 INFO L87 Difference]: Start difference. First operand 94899 states and 111590 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:13,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:13,650 INFO L93 Difference]: Finished difference Result 190023 states and 223921 transitions. [2022-11-25 16:43:13,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:13,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 265 [2022-11-25 16:43:13,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:13,772 INFO L225 Difference]: With dead ends: 190023 [2022-11-25 16:43:13,772 INFO L226 Difference]: Without dead ends: 97363 [2022-11-25 16:43:13,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:13,822 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 214 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:13,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 379 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 16:43:13,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97363 states. [2022-11-25 16:43:14,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97363 to 81880. [2022-11-25 16:43:15,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81880 states, 81879 states have (on average 1.1747578744244556) internal successors, (96188), 81879 states have internal predecessors, (96188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:15,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81880 states to 81880 states and 96188 transitions. [2022-11-25 16:43:15,131 INFO L78 Accepts]: Start accepts. Automaton has 81880 states and 96188 transitions. Word has length 265 [2022-11-25 16:43:15,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:15,131 INFO L495 AbstractCegarLoop]: Abstraction has 81880 states and 96188 transitions. [2022-11-25 16:43:15,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:15,132 INFO L276 IsEmpty]: Start isEmpty. Operand 81880 states and 96188 transitions. [2022-11-25 16:43:15,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-11-25 16:43:15,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:15,179 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:43:15,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 16:43:15,180 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:15,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:15,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1012338614, now seen corresponding path program 1 times [2022-11-25 16:43:15,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:15,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010202437] [2022-11-25 16:43:15,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:15,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:15,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:16,172 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:16,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:16,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010202437] [2022-11-25 16:43:16,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010202437] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:16,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:16,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:43:16,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590031104] [2022-11-25 16:43:16,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:16,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:16,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:16,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:16,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:16,177 INFO L87 Difference]: Start difference. First operand 81880 states and 96188 transitions. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 2 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:17,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:17,616 INFO L93 Difference]: Finished difference Result 163353 states and 191946 transitions. [2022-11-25 16:43:17,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:17,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 2 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 268 [2022-11-25 16:43:17,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:17,699 INFO L225 Difference]: With dead ends: 163353 [2022-11-25 16:43:17,699 INFO L226 Difference]: Without dead ends: 82288 [2022-11-25 16:43:17,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:17,728 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 133 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:17,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 199 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 16:43:17,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82288 states. [2022-11-25 16:43:18,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82288 to 82286. [2022-11-25 16:43:18,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82286 states, 82285 states have (on average 1.174478945129732) internal successors, (96642), 82285 states have internal predecessors, (96642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:18,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82286 states to 82286 states and 96642 transitions. [2022-11-25 16:43:18,977 INFO L78 Accepts]: Start accepts. Automaton has 82286 states and 96642 transitions. Word has length 268 [2022-11-25 16:43:18,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:18,977 INFO L495 AbstractCegarLoop]: Abstraction has 82286 states and 96642 transitions. [2022-11-25 16:43:18,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 2 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:18,978 INFO L276 IsEmpty]: Start isEmpty. Operand 82286 states and 96642 transitions. [2022-11-25 16:43:19,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-11-25 16:43:19,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:19,027 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:43:19,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 16:43:19,027 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:19,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:19,028 INFO L85 PathProgramCache]: Analyzing trace with hash -605481540, now seen corresponding path program 1 times [2022-11-25 16:43:19,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:19,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351100809] [2022-11-25 16:43:19,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:19,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:19,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:19,995 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-25 16:43:19,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:19,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351100809] [2022-11-25 16:43:19,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351100809] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:19,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:19,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:43:19,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750209498] [2022-11-25 16:43:19,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:19,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:43:19,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:19,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:43:19,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:43:19,998 INFO L87 Difference]: Start difference. First operand 82286 states and 96642 transitions. Second operand has 4 states, 4 states have (on average 60.5) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:21,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:21,782 INFO L93 Difference]: Finished difference Result 163824 states and 192507 transitions. [2022-11-25 16:43:21,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:43:21,783 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.5) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 281 [2022-11-25 16:43:21,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:21,871 INFO L225 Difference]: With dead ends: 163824 [2022-11-25 16:43:21,871 INFO L226 Difference]: Without dead ends: 82759 [2022-11-25 16:43:21,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:43:21,910 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 409 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:21,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 165 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-25 16:43:21,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82759 states. [2022-11-25 16:43:22,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82759 to 79850. [2022-11-25 16:43:22,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79850 states, 79849 states have (on average 1.17634535185162) internal successors, (93930), 79849 states have internal predecessors, (93930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:23,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79850 states to 79850 states and 93930 transitions. [2022-11-25 16:43:23,066 INFO L78 Accepts]: Start accepts. Automaton has 79850 states and 93930 transitions. Word has length 281 [2022-11-25 16:43:23,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:23,067 INFO L495 AbstractCegarLoop]: Abstraction has 79850 states and 93930 transitions. [2022-11-25 16:43:23,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.5) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:23,067 INFO L276 IsEmpty]: Start isEmpty. Operand 79850 states and 93930 transitions. [2022-11-25 16:43:23,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2022-11-25 16:43:23,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:23,492 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:43:23,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 16:43:23,492 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:23,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:23,493 INFO L85 PathProgramCache]: Analyzing trace with hash 2105980273, now seen corresponding path program 1 times [2022-11-25 16:43:23,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:23,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390570677] [2022-11-25 16:43:23,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:23,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:23,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:23,981 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 109 proven. 6 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-25 16:43:23,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:23,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390570677] [2022-11-25 16:43:23,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390570677] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:43:23,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118553099] [2022-11-25 16:43:23,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:23,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:23,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:43:23,984 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:43:24,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 16:43:24,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:24,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 16:43:24,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:43:24,294 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-25 16:43:24,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:43:24,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118553099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:24,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:43:24,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-25 16:43:24,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35398828] [2022-11-25 16:43:24,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:24,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:24,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:24,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:24,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:43:24,297 INFO L87 Difference]: Start difference. First operand 79850 states and 93930 transitions. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:25,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:25,987 INFO L93 Difference]: Finished difference Result 154877 states and 181630 transitions. [2022-11-25 16:43:25,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:25,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 288 [2022-11-25 16:43:25,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:26,090 INFO L225 Difference]: With dead ends: 154877 [2022-11-25 16:43:26,091 INFO L226 Difference]: Without dead ends: 75435 [2022-11-25 16:43:26,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:43:26,126 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 214 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:26,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 393 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 16:43:26,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75435 states. [2022-11-25 16:43:27,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75435 to 75384. [2022-11-25 16:43:27,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75384 states, 75383 states have (on average 1.1582850244750142) internal successors, (87315), 75383 states have internal predecessors, (87315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:27,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75384 states to 75384 states and 87315 transitions. [2022-11-25 16:43:27,598 INFO L78 Accepts]: Start accepts. Automaton has 75384 states and 87315 transitions. Word has length 288 [2022-11-25 16:43:27,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:27,598 INFO L495 AbstractCegarLoop]: Abstraction has 75384 states and 87315 transitions. [2022-11-25 16:43:27,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:27,599 INFO L276 IsEmpty]: Start isEmpty. Operand 75384 states and 87315 transitions. [2022-11-25 16:43:27,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-11-25 16:43:27,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:27,632 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:27,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 16:43:27,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 16:43:27,839 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:27,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:27,840 INFO L85 PathProgramCache]: Analyzing trace with hash -2139363347, now seen corresponding path program 1 times [2022-11-25 16:43:27,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:27,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042659531] [2022-11-25 16:43:27,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:27,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:28,220 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-25 16:43:28,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:28,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042659531] [2022-11-25 16:43:28,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042659531] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:28,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:28,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:43:28,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915536742] [2022-11-25 16:43:28,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:28,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:28,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:28,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:28,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:28,223 INFO L87 Difference]: Start difference. First operand 75384 states and 87315 transitions. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 2 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:30,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:30,097 INFO L93 Difference]: Finished difference Result 190687 states and 221025 transitions. [2022-11-25 16:43:30,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:30,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 2 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 302 [2022-11-25 16:43:30,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:30,229 INFO L225 Difference]: With dead ends: 190687 [2022-11-25 16:43:30,229 INFO L226 Difference]: Without dead ends: 116321 [2022-11-25 16:43:30,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:30,260 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 243 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:30,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 223 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 16:43:30,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116321 states. [2022-11-25 16:43:31,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116321 to 115687. [2022-11-25 16:43:31,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115687 states, 115686 states have (on average 1.155982573517971) internal successors, (133731), 115686 states have internal predecessors, (133731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:31,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115687 states to 115687 states and 133731 transitions. [2022-11-25 16:43:31,780 INFO L78 Accepts]: Start accepts. Automaton has 115687 states and 133731 transitions. Word has length 302 [2022-11-25 16:43:31,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:31,780 INFO L495 AbstractCegarLoop]: Abstraction has 115687 states and 133731 transitions. [2022-11-25 16:43:31,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 2 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:31,781 INFO L276 IsEmpty]: Start isEmpty. Operand 115687 states and 133731 transitions. [2022-11-25 16:43:31,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2022-11-25 16:43:31,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:31,826 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:43:31,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-25 16:43:31,827 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:31,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:31,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1713025815, now seen corresponding path program 1 times [2022-11-25 16:43:31,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:31,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42470329] [2022-11-25 16:43:31,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:31,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:31,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:32,808 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-25 16:43:32,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:32,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42470329] [2022-11-25 16:43:32,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42470329] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:32,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:32,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:43:32,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96295871] [2022-11-25 16:43:32,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:32,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:43:32,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:32,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:43:32,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:43:32,813 INFO L87 Difference]: Start difference. First operand 115687 states and 133731 transitions. Second operand has 4 states, 4 states have (on average 69.75) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:34,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:34,493 INFO L93 Difference]: Finished difference Result 190567 states and 220708 transitions. [2022-11-25 16:43:34,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:43:34,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 69.75) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 307 [2022-11-25 16:43:34,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:34,574 INFO L225 Difference]: With dead ends: 190567 [2022-11-25 16:43:34,574 INFO L226 Difference]: Without dead ends: 72246 [2022-11-25 16:43:34,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:43:34,625 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 463 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:34,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 59 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 16:43:34,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72246 states. [2022-11-25 16:43:35,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72246 to 68591. [2022-11-25 16:43:35,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68591 states, 68590 states have (on average 1.0949263741070128) internal successors, (75101), 68590 states have internal predecessors, (75101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:35,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68591 states to 68591 states and 75101 transitions. [2022-11-25 16:43:35,752 INFO L78 Accepts]: Start accepts. Automaton has 68591 states and 75101 transitions. Word has length 307 [2022-11-25 16:43:35,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:35,753 INFO L495 AbstractCegarLoop]: Abstraction has 68591 states and 75101 transitions. [2022-11-25 16:43:35,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.75) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:35,753 INFO L276 IsEmpty]: Start isEmpty. Operand 68591 states and 75101 transitions. [2022-11-25 16:43:35,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-11-25 16:43:35,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:35,779 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:35,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-25 16:43:35,780 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:35,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:35,780 INFO L85 PathProgramCache]: Analyzing trace with hash -876686430, now seen corresponding path program 1 times [2022-11-25 16:43:35,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:35,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705844884] [2022-11-25 16:43:35,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:35,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:36,378 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:43:36,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:36,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705844884] [2022-11-25 16:43:36,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705844884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:36,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:36,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:43:36,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362203695] [2022-11-25 16:43:36,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:36,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:36,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:36,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:36,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:36,383 INFO L87 Difference]: Start difference. First operand 68591 states and 75101 transitions. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:37,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:37,358 INFO L93 Difference]: Finished difference Result 116815 states and 127719 transitions. [2022-11-25 16:43:37,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:37,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 309 [2022-11-25 16:43:37,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:37,415 INFO L225 Difference]: With dead ends: 116815 [2022-11-25 16:43:37,415 INFO L226 Difference]: Without dead ends: 58403 [2022-11-25 16:43:37,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 16:43:37,441 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 217 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:37,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 312 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 16:43:37,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58403 states. [2022-11-25 16:43:38,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58403 to 56563. [2022-11-25 16:43:38,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56563 states, 56562 states have (on average 1.083943283476539) internal successors, (61310), 56562 states have internal predecessors, (61310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:38,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56563 states to 56563 states and 61310 transitions. [2022-11-25 16:43:38,317 INFO L78 Accepts]: Start accepts. Automaton has 56563 states and 61310 transitions. Word has length 309 [2022-11-25 16:43:38,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:38,317 INFO L495 AbstractCegarLoop]: Abstraction has 56563 states and 61310 transitions. [2022-11-25 16:43:38,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:38,318 INFO L276 IsEmpty]: Start isEmpty. Operand 56563 states and 61310 transitions. [2022-11-25 16:43:38,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2022-11-25 16:43:38,341 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:38,341 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:43:38,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-25 16:43:38,341 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:38,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:38,342 INFO L85 PathProgramCache]: Analyzing trace with hash 488183126, now seen corresponding path program 1 times [2022-11-25 16:43:38,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:38,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771424579] [2022-11-25 16:43:38,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:38,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:38,609 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-25 16:43:38,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:38,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771424579] [2022-11-25 16:43:38,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771424579] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:38,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:43:38,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 16:43:38,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788210226] [2022-11-25 16:43:38,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:38,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:43:38,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:38,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:43:38,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:43:38,612 INFO L87 Difference]: Start difference. First operand 56563 states and 61310 transitions. Second operand has 4 states, 4 states have (on average 74.25) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:40,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:40,315 INFO L93 Difference]: Finished difference Result 103381 states and 111844 transitions. [2022-11-25 16:43:40,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:43:40,316 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 74.25) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 315 [2022-11-25 16:43:40,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:40,389 INFO L225 Difference]: With dead ends: 103381 [2022-11-25 16:43:40,389 INFO L226 Difference]: Without dead ends: 58419 [2022-11-25 16:43:40,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:43:40,414 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 348 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:40,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 85 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 16:43:40,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58419 states. [2022-11-25 16:43:41,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58419 to 57581. [2022-11-25 16:43:41,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57581 states, 57580 states have (on average 1.08238971865231) internal successors, (62324), 57580 states have internal predecessors, (62324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:41,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57581 states to 57581 states and 62324 transitions. [2022-11-25 16:43:41,243 INFO L78 Accepts]: Start accepts. Automaton has 57581 states and 62324 transitions. Word has length 315 [2022-11-25 16:43:41,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:41,244 INFO L495 AbstractCegarLoop]: Abstraction has 57581 states and 62324 transitions. [2022-11-25 16:43:41,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.25) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:41,244 INFO L276 IsEmpty]: Start isEmpty. Operand 57581 states and 62324 transitions. [2022-11-25 16:43:41,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2022-11-25 16:43:41,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:41,280 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:43:41,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-25 16:43:41,280 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:41,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:41,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1356426216, now seen corresponding path program 1 times [2022-11-25 16:43:41,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:41,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728406995] [2022-11-25 16:43:41,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:41,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 100 proven. 6 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-11-25 16:43:42,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:42,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728406995] [2022-11-25 16:43:42,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728406995] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:43:42,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412213246] [2022-11-25 16:43:42,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:42,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:42,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:43:42,051 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:43:42,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 16:43:42,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:42,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 16:43:42,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:43:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-25 16:43:42,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:43:42,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412213246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:42,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:43:42,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-25 16:43:42,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130158206] [2022-11-25 16:43:42,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:42,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:42,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:42,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:42,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:43:42,678 INFO L87 Difference]: Start difference. First operand 57581 states and 62324 transitions. Second operand has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:43,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:43,629 INFO L93 Difference]: Finished difference Result 113332 states and 122754 transitions. [2022-11-25 16:43:43,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:43,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 328 [2022-11-25 16:43:43,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:43,693 INFO L225 Difference]: With dead ends: 113332 [2022-11-25 16:43:43,693 INFO L226 Difference]: Without dead ends: 57174 [2022-11-25 16:43:43,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:43:43,719 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 69 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:43,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 274 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 16:43:43,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57174 states. [2022-11-25 16:43:44,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57174 to 57169. [2022-11-25 16:43:44,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57169 states, 57168 states have (on average 1.0792226420375035) internal successors, (61697), 57168 states have internal predecessors, (61697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:44,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57169 states to 57169 states and 61697 transitions. [2022-11-25 16:43:44,576 INFO L78 Accepts]: Start accepts. Automaton has 57169 states and 61697 transitions. Word has length 328 [2022-11-25 16:43:44,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:43:44,577 INFO L495 AbstractCegarLoop]: Abstraction has 57169 states and 61697 transitions. [2022-11-25 16:43:44,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:44,577 INFO L276 IsEmpty]: Start isEmpty. Operand 57169 states and 61697 transitions. [2022-11-25 16:43:44,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2022-11-25 16:43:44,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:43:44,603 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:43:44,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 16:43:44,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:44,803 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:43:44,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:43:44,804 INFO L85 PathProgramCache]: Analyzing trace with hash -287112087, now seen corresponding path program 1 times [2022-11-25 16:43:44,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:43:44,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488314467] [2022-11-25 16:43:44,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:44,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:43:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:45,108 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 152 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-25 16:43:45,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:43:45,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488314467] [2022-11-25 16:43:45,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488314467] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:43:45,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529620164] [2022-11-25 16:43:45,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:43:45,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:43:45,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:43:45,111 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:43:45,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2423e2e2-dd9c-4606-b0d5-7ec81924b2b2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 16:43:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:43:45,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 16:43:45,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:43:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-25 16:43:45,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:43:45,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529620164] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:43:45,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:43:45,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-25 16:43:45,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300115511] [2022-11-25 16:43:45,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:43:45,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 16:43:45,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:43:45,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 16:43:45,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:43:45,783 INFO L87 Difference]: Start difference. First operand 57169 states and 61697 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 2 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 16:43:46,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:43:46,457 INFO L93 Difference]: Finished difference Result 145870 states and 156967 transitions. [2022-11-25 16:43:46,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 16:43:46,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 2 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 343 [2022-11-25 16:43:46,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:43:46,559 INFO L225 Difference]: With dead ends: 145870 [2022-11-25 16:43:46,559 INFO L226 Difference]: Without dead ends: 90124 [2022-11-25 16:43:46,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:43:46,591 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 178 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:43:46,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 474 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 16:43:46,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90124 states.