./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sep60-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/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_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sep60-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/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_b51b9021-e84c-4e46-897f-0bd0127e0c2a/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 b065e6ebd473a7ead2bba44643aa633e2e19aa846c3de415abaad6e73d224b64 --- 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 15:43:34,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:43:34,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:43:34,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:43:34,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:43:34,517 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:43:34,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:43:34,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:43:34,527 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:43:34,528 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:43:34,529 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:43:34,530 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:43:34,531 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:43:34,532 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:43:34,533 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:43:34,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:43:34,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:43:34,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:43:34,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:43:34,559 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:43:34,560 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:43:34,564 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:43:34,566 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:43:34,567 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:43:34,571 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:43:34,571 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:43:34,572 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:43:34,573 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:43:34,573 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:43:34,574 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:43:34,578 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:43:34,579 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:43:34,582 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:43:34,583 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:43:34,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:43:34,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:43:34,586 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:43:34,586 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:43:34,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:43:34,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:43:34,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:43:34,590 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 15:43:34,646 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:43:34,646 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:43:34,647 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:43:34,647 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:43:34,649 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:43:34,649 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:43:34,650 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:43:34,650 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:43:34,650 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:43:34,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:43:34,652 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:43:34,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:43:34,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:43:34,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:43:34,653 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 15:43:34,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:43:34,653 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 15:43:34,654 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:43:34,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 15:43:34,654 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:43:34,654 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 15:43:34,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:43:34,655 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:43:34,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:43:34,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:43:34,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:43:34,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:43:34,656 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 15:43:34,656 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:43:34,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:43:34,657 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:43:34,657 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 15:43:34,657 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:43:34,658 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:43:34,658 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_b51b9021-e84c-4e46-897f-0bd0127e0c2a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b065e6ebd473a7ead2bba44643aa633e2e19aa846c3de415abaad6e73d224b64 [2022-11-25 15:43:34,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:43:35,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:43:35,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:43:35,040 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:43:35,041 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:43:35,042 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/reducercommutativity/sep60-2.i [2022-11-25 15:43:38,234 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:43:38,485 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:43:38,486 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/sv-benchmarks/c/reducercommutativity/sep60-2.i [2022-11-25 15:43:38,495 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/data/a925e1b90/fcbadd65b4cb4d37818459b862a8c661/FLAGeea9a0cbd [2022-11-25 15:43:38,520 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/data/a925e1b90/fcbadd65b4cb4d37818459b862a8c661 [2022-11-25 15:43:38,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:43:38,528 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:43:38,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:43:38,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:43:38,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:43:38,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:43:38" (1/1) ... [2022-11-25 15:43:38,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ef3737f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:43:38, skipping insertion in model container [2022-11-25 15:43:38,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:43:38" (1/1) ... [2022-11-25 15:43:38,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:43:38,565 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:43:38,786 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_b51b9021-e84c-4e46-897f-0bd0127e0c2a/sv-benchmarks/c/reducercommutativity/sep60-2.i[1293,1306] [2022-11-25 15:43:38,791 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:43:38,802 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:43:38,837 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_b51b9021-e84c-4e46-897f-0bd0127e0c2a/sv-benchmarks/c/reducercommutativity/sep60-2.i[1293,1306] [2022-11-25 15:43:38,843 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:43:38,860 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:43:38,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:43:38 WrapperNode [2022-11-25 15:43:38,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:43:38,863 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:43:38,863 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:43:38,864 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:43:38,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:43:38" (1/1) ... [2022-11-25 15:43:38,893 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:43:38" (1/1) ... [2022-11-25 15:43:38,923 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-11-25 15:43:38,924 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:43:38,925 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:43:38,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:43:38,925 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:43:38,937 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:43:38" (1/1) ... [2022-11-25 15:43:38,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:43:38" (1/1) ... [2022-11-25 15:43:38,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:43:38" (1/1) ... [2022-11-25 15:43:38,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:43:38" (1/1) ... [2022-11-25 15:43:38,963 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:43:38" (1/1) ... [2022-11-25 15:43:38,970 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:43:38" (1/1) ... [2022-11-25 15:43:38,978 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:43:38" (1/1) ... [2022-11-25 15:43:38,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:43:38" (1/1) ... [2022-11-25 15:43:38,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:43:38,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:43:38,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:43:38,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:43:38,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:43:38" (1/1) ... [2022-11-25 15:43:38,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:43:39,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:43:39,029 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:43:39,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:43:39,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:43:39,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:43:39,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:43:39,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 15:43:39,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:43:39,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:43:39,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 15:43:39,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:43:39,080 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2022-11-25 15:43:39,081 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2022-11-25 15:43:39,162 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:43:39,165 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:43:39,435 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:43:39,442 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:43:39,455 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 15:43:39,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:43:39 BoogieIcfgContainer [2022-11-25 15:43:39,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:43:39,460 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:43:39,461 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:43:39,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:43:39,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:43:38" (1/3) ... [2022-11-25 15:43:39,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@373bb80a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:43:39, skipping insertion in model container [2022-11-25 15:43:39,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:43:38" (2/3) ... [2022-11-25 15:43:39,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@373bb80a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:43:39, skipping insertion in model container [2022-11-25 15:43:39,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:43:39" (3/3) ... [2022-11-25 15:43:39,495 INFO L112 eAbstractionObserver]: Analyzing ICFG sep60-2.i [2022-11-25 15:43:39,518 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:43:39,518 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 15:43:39,594 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:43:39,607 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;@ecd9a3e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:43:39,608 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 15:43:39,612 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:43:39,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-25 15:43:39,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:43:39,624 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:43:39,625 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:43:39,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:43:39,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1312709850, now seen corresponding path program 1 times [2022-11-25 15:43:39,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:43:39,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781657258] [2022-11-25 15:43:39,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:39,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:43:39,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:40,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 15:43:40,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:40,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-25 15:43:40,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:40,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-25 15:43:40,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 15:43:40,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:43:40,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781657258] [2022-11-25 15:43:40,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781657258] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:43:40,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:43:40,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:43:40,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278092807] [2022-11-25 15:43:40,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:43:40,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:43:40,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:43:40,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:43:40,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:43:40,094 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 15:43:40,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:43:40,131 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2022-11-25 15:43:40,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:43:40,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-11-25 15:43:40,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:43:40,150 INFO L225 Difference]: With dead ends: 52 [2022-11-25 15:43:40,150 INFO L226 Difference]: Without dead ends: 25 [2022-11-25 15:43:40,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 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 15:43:40,166 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:43:40,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 15:43:40,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-25 15:43:40,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-11-25 15:43:40,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:43:40,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-11-25 15:43:40,228 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2022-11-25 15:43:40,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:43:40,229 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-11-25 15:43:40,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 15:43:40,231 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-11-25 15:43:40,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 15:43:40,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:43:40,235 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:43:40,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:43:40,236 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:43:40,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:43:40,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1845794557, now seen corresponding path program 1 times [2022-11-25 15:43:40,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:43:40,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86798302] [2022-11-25 15:43:40,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:40,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:43:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:40,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-25 15:43:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:40,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 15:43:40,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:40,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-25 15:43:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:40,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 15:43:40,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:43:40,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86798302] [2022-11-25 15:43:40,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86798302] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:43:40,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714214945] [2022-11-25 15:43:40,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:40,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:43:40,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:43:40,482 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:43:40,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 15:43:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:40,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 15:43:40,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:43:40,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 15:43:40,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:43:40,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714214945] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:43:40,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:43:40,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-25 15:43:40,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707515769] [2022-11-25 15:43:40,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:43:40,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:43:40,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:43:40,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:43:40,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:43:40,680 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 15:43:40,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:43:40,693 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-11-25 15:43:40,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:43:40,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-11-25 15:43:40,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:43:40,695 INFO L225 Difference]: With dead ends: 45 [2022-11-25 15:43:40,695 INFO L226 Difference]: Without dead ends: 27 [2022-11-25 15:43:40,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:43:40,697 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:43:40,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 15:43:40,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-25 15:43:40,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-11-25 15:43:40,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:43:40,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-11-25 15:43:40,704 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2022-11-25 15:43:40,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:43:40,705 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-11-25 15:43:40,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 15:43:40,705 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-11-25 15:43:40,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 15:43:40,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:43:40,708 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:43:40,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 15:43:40,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:43:40,914 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:43:40,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:43:40,914 INFO L85 PathProgramCache]: Analyzing trace with hash -701057785, now seen corresponding path program 1 times [2022-11-25 15:43:40,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:43:40,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545627398] [2022-11-25 15:43:40,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:40,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:43:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:41,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-25 15:43:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:41,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 15:43:41,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:41,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-25 15:43:41,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 15:43:41,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:43:41,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545627398] [2022-11-25 15:43:41,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545627398] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:43:41,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383298070] [2022-11-25 15:43:41,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:41,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:43:41,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:43:41,104 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:43:41,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 15:43:41,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:41,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 15:43:41,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:43:41,276 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 15:43:41,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:43:41,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383298070] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:43:41,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:43:41,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-25 15:43:41,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938262373] [2022-11-25 15:43:41,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:43:41,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:43:41,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:43:41,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:43:41,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:43:41,286 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 15:43:41,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:43:41,316 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-11-25 15:43:41,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:43:41,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-11-25 15:43:41,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:43:41,320 INFO L225 Difference]: With dead ends: 41 [2022-11-25 15:43:41,321 INFO L226 Difference]: Without dead ends: 27 [2022-11-25 15:43:41,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:43:41,325 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:43:41,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 15:43:41,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-25 15:43:41,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-11-25 15:43:41,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:43:41,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-25 15:43:41,343 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 39 [2022-11-25 15:43:41,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:43:41,345 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-25 15:43:41,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 15:43:41,346 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-25 15:43:41,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 15:43:41,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:43:41,350 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:43:41,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 15:43:41,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:43:41,557 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:43:41,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:43:41,557 INFO L85 PathProgramCache]: Analyzing trace with hash -235909079, now seen corresponding path program 1 times [2022-11-25 15:43:41,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:43:41,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16663074] [2022-11-25 15:43:41,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:41,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:43:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:41,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-25 15:43:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:41,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-25 15:43:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:41,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-25 15:43:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:41,824 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 15:43:41,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:43:41,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16663074] [2022-11-25 15:43:41,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16663074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:43:41,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301691199] [2022-11-25 15:43:41,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:41,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:43:41,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:43:41,836 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:43:41,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 15:43:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:41,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 15:43:41,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:43:42,003 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-25 15:43:42,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:43:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-25 15:43:42,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301691199] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:43:42,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:43:42,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-11-25 15:43:42,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259714212] [2022-11-25 15:43:42,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:43:42,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 15:43:42,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:43:42,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 15:43:42,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-25 15:43:42,080 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 15:43:42,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:43:42,152 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-11-25 15:43:42,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 15:43:42,153 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2022-11-25 15:43:42,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:43:42,156 INFO L225 Difference]: With dead ends: 58 [2022-11-25 15:43:42,156 INFO L226 Difference]: Without dead ends: 37 [2022-11-25 15:43:42,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-25 15:43:42,161 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:43:42,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 156 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 15:43:42,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-25 15:43:42,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-11-25 15:43:42,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:43:42,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-11-25 15:43:42,176 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 41 [2022-11-25 15:43:42,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:43:42,177 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-11-25 15:43:42,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 15:43:42,177 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-11-25 15:43:42,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-25 15:43:42,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:43:42,179 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:43:42,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 15:43:42,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:43:42,387 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:43:42,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:43:42,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1946429025, now seen corresponding path program 2 times [2022-11-25 15:43:42,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:43:42,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701774950] [2022-11-25 15:43:42,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:42,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:43:42,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:42,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-25 15:43:42,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:42,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 15:43:42,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:42,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-25 15:43:42,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-25 15:43:42,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:43:42,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701774950] [2022-11-25 15:43:42,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701774950] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:43:42,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280901308] [2022-11-25 15:43:42,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:43:42,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:43:42,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:43:42,639 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:43:42,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 15:43:42,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:43:42,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:43:42,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 15:43:42,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:43:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-25 15:43:42,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:43:42,896 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-25 15:43:42,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280901308] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:43:42,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:43:42,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-11-25 15:43:42,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719241029] [2022-11-25 15:43:42,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:43:42,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 15:43:42,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:43:42,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 15:43:42,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-25 15:43:42,899 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 15:43:42,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:43:42,961 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2022-11-25 15:43:42,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 15:43:42,962 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2022-11-25 15:43:42,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:43:42,963 INFO L225 Difference]: With dead ends: 74 [2022-11-25 15:43:42,963 INFO L226 Difference]: Without dead ends: 50 [2022-11-25 15:43:42,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-25 15:43:42,965 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:43:42,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 111 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 15:43:42,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-25 15:43:42,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-11-25 15:43:42,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:43:42,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-11-25 15:43:42,973 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 56 [2022-11-25 15:43:42,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:43:42,974 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-11-25 15:43:42,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 15:43:42,974 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-11-25 15:43:42,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-25 15:43:42,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:43:42,976 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:43:42,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-25 15:43:43,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:43:43,182 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:43:43,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:43:43,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1341839115, now seen corresponding path program 3 times [2022-11-25 15:43:43,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:43:43,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555050037] [2022-11-25 15:43:43,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:43,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:43:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:43,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-25 15:43:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:43,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-25 15:43:43,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:43,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-25 15:43:43,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:43,553 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-25 15:43:43,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:43:43,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555050037] [2022-11-25 15:43:43,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555050037] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:43:43,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555407446] [2022-11-25 15:43:43,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:43:43,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:43:43,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:43:43,555 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:43:43,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 15:43:43,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 15:43:43,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:43:43,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 15:43:43,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:43:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-25 15:43:43,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:43:43,815 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-25 15:43:43,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555407446] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:43:43,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:43:43,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-11-25 15:43:43,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986519867] [2022-11-25 15:43:43,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:43:43,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 15:43:43,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:43:43,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 15:43:43,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-11-25 15:43:43,825 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 15:43:43,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:43:43,923 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2022-11-25 15:43:43,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 15:43:43,924 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2022-11-25 15:43:43,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:43:43,928 INFO L225 Difference]: With dead ends: 90 [2022-11-25 15:43:43,928 INFO L226 Difference]: Without dead ends: 64 [2022-11-25 15:43:43,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-11-25 15:43:43,933 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 18 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:43:43,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 118 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:43:43,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-25 15:43:43,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-11-25 15:43:43,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:43:43,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2022-11-25 15:43:43,951 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 70 [2022-11-25 15:43:43,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:43:43,952 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2022-11-25 15:43:43,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 15:43:43,956 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2022-11-25 15:43:43,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-25 15:43:43,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:43:43,957 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:43:43,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 15:43:44,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 15:43:44,167 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:43:44,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:43:44,167 INFO L85 PathProgramCache]: Analyzing trace with hash 2138241293, now seen corresponding path program 4 times [2022-11-25 15:43:44,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:43:44,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087648872] [2022-11-25 15:43:44,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:44,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:43:44,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:44,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 15:43:44,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:44,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-25 15:43:44,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:44,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-25 15:43:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:44,785 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-11-25 15:43:44,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:43:44,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087648872] [2022-11-25 15:43:44,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087648872] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:43:44,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677221332] [2022-11-25 15:43:44,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:43:44,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:43:44,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:43:44,788 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:43:44,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 15:43:44,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:43:44,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:43:44,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 15:43:44,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:43:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-11-25 15:43:45,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:43:45,398 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-11-25 15:43:45,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677221332] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:43:45,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:43:45,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-11-25 15:43:45,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027904019] [2022-11-25 15:43:45,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:43:45,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 15:43:45,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:43:45,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 15:43:45,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-11-25 15:43:45,402 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 15:43:45,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:43:45,502 INFO L93 Difference]: Finished difference Result 127 states and 159 transitions. [2022-11-25 15:43:45,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 15:43:45,502 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 108 [2022-11-25 15:43:45,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:43:45,504 INFO L225 Difference]: With dead ends: 127 [2022-11-25 15:43:45,504 INFO L226 Difference]: Without dead ends: 89 [2022-11-25 15:43:45,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-11-25 15:43:45,505 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:43:45,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 74 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:43:45,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-25 15:43:45,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-11-25 15:43:45,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.1071428571428572) internal successors, (93), 84 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:43:45,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2022-11-25 15:43:45,515 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 108 [2022-11-25 15:43:45,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:43:45,516 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2022-11-25 15:43:45,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 15:43:45,516 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2022-11-25 15:43:45,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-25 15:43:45,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:43:45,518 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:43:45,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 15:43:45,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:43:45,724 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:43:45,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:43:45,725 INFO L85 PathProgramCache]: Analyzing trace with hash 819840039, now seen corresponding path program 5 times [2022-11-25 15:43:45,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:43:45,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154996378] [2022-11-25 15:43:45,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:45,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:43:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:46,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-25 15:43:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:46,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-25 15:43:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:46,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-25 15:43:46,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:46,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-11-25 15:43:46,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:43:46,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154996378] [2022-11-25 15:43:46,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154996378] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:43:46,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884023752] [2022-11-25 15:43:46,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:43:46,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:43:46,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:43:46,923 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:43:46,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 15:43:50,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-11-25 15:43:50,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:43:50,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 15:43:50,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:43:50,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2022-11-25 15:43:50,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:43:51,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 809 trivial. 0 not checked. [2022-11-25 15:43:51,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884023752] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:43:51,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:43:51,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 9, 9] total 41 [2022-11-25 15:43:51,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36949481] [2022-11-25 15:43:51,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:43:51,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-25 15:43:51,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:43:51,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-25 15:43:51,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2022-11-25 15:43:51,173 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 15:43:51,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:43:51,365 INFO L93 Difference]: Finished difference Result 154 states and 193 transitions. [2022-11-25 15:43:51,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-25 15:43:51,366 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 134 [2022-11-25 15:43:51,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:43:51,369 INFO L225 Difference]: With dead ends: 154 [2022-11-25 15:43:51,369 INFO L226 Difference]: Without dead ends: 116 [2022-11-25 15:43:51,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2022-11-25 15:43:51,375 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 40 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:43:51,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 194 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 15:43:51,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-25 15:43:51,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-11-25 15:43:51,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 110 states have internal predecessors, (127), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:43:51,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 133 transitions. [2022-11-25 15:43:51,404 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 133 transitions. Word has length 134 [2022-11-25 15:43:51,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:43:51,405 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 133 transitions. [2022-11-25 15:43:51,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 15:43:51,405 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 133 transitions. [2022-11-25 15:43:51,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-25 15:43:51,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:43:51,413 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 25, 25, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:43:51,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-25 15:43:51,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:43:51,623 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:43:51,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:43:51,623 INFO L85 PathProgramCache]: Analyzing trace with hash 412352681, now seen corresponding path program 6 times [2022-11-25 15:43:51,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:43:51,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549384569] [2022-11-25 15:43:51,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:51,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:43:51,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:53,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-25 15:43:53,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:53,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-11-25 15:43:53,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:53,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-11-25 15:43:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:53,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 2728 trivial. 0 not checked. [2022-11-25 15:43:53,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:43:53,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549384569] [2022-11-25 15:43:53,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549384569] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:43:53,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626454949] [2022-11-25 15:43:53,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:43:53,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:43:53,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:43:53,337 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:43:53,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 15:43:53,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-25 15:43:53,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:43:53,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 15:43:53,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:43:53,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 1242 proven. 4 refuted. 0 times theorem prover too weak. 2107 trivial. 0 not checked. [2022-11-25 15:43:53,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:43:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3349 trivial. 0 not checked. [2022-11-25 15:43:53,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626454949] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:43:53,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:43:53,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 5, 5] total 34 [2022-11-25 15:43:53,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764698832] [2022-11-25 15:43:53,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:43:53,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 15:43:53,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:43:53,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 15:43:53,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=717, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 15:43:53,664 INFO L87 Difference]: Start difference. First operand 115 states and 133 transitions. Second operand has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 15:43:53,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:43:53,812 INFO L93 Difference]: Finished difference Result 188 states and 228 transitions. [2022-11-25 15:43:53,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 15:43:53,813 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 208 [2022-11-25 15:43:53,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:43:53,814 INFO L225 Difference]: With dead ends: 188 [2022-11-25 15:43:53,814 INFO L226 Difference]: Without dead ends: 126 [2022-11-25 15:43:53,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=717, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 15:43:53,816 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:43:53,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 199 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:43:53,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-25 15:43:53,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2022-11-25 15:43:53,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.1416666666666666) internal successors, (137), 120 states have internal predecessors, (137), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:43:53,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 143 transitions. [2022-11-25 15:43:53,832 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 143 transitions. Word has length 208 [2022-11-25 15:43:53,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:43:53,833 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 143 transitions. [2022-11-25 15:43:53,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 15:43:53,833 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 143 transitions. [2022-11-25 15:43:53,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-25 15:43:53,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:43:53,836 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 26, 26, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:43:53,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 15:43:54,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 15:43:54,043 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:43:54,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:43:54,044 INFO L85 PathProgramCache]: Analyzing trace with hash 559440675, now seen corresponding path program 7 times [2022-11-25 15:43:54,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:43:54,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277751750] [2022-11-25 15:43:54,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:54,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:43:54,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:55,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-25 15:43:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:55,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-11-25 15:43:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:55,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-11-25 15:43:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:55,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3436 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2022-11-25 15:43:55,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:43:55,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277751750] [2022-11-25 15:43:55,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277751750] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:43:55,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204676600] [2022-11-25 15:43:55,577 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 15:43:55,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:43:55,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:43:55,578 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:43:55,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 15:43:55,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:55,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 15:43:55,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:43:55,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3436 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2022-11-25 15:43:55,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:43:57,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3436 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2022-11-25 15:43:57,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204676600] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:43:57,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:43:57,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2022-11-25 15:43:57,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398879241] [2022-11-25 15:43:57,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:43:57,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-25 15:43:57,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:43:57,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-25 15:43:57,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2022-11-25 15:43:57,228 INFO L87 Difference]: Start difference. First operand 125 states and 143 transitions. Second operand has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 57 states have internal predecessors, (135), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 15:43:57,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:43:57,439 INFO L93 Difference]: Finished difference Result 251 states and 314 transitions. [2022-11-25 15:43:57,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-25 15:43:57,440 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 57 states have internal predecessors, (135), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 218 [2022-11-25 15:43:57,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:43:57,442 INFO L225 Difference]: With dead ends: 251 [2022-11-25 15:43:57,442 INFO L226 Difference]: Without dead ends: 181 [2022-11-25 15:43:57,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2022-11-25 15:43:57,445 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:43:57,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 170 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 15:43:57,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-25 15:43:57,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2022-11-25 15:43:57,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0965909090909092) internal successors, (193), 176 states have internal predecessors, (193), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:43:57,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 199 transitions. [2022-11-25 15:43:57,456 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 199 transitions. Word has length 218 [2022-11-25 15:43:57,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:43:57,456 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 199 transitions. [2022-11-25 15:43:57,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 57 states have internal predecessors, (135), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 15:43:57,457 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 199 transitions. [2022-11-25 15:43:57,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-11-25 15:43:57,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:43:57,460 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:43:57,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-25 15:43:57,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 15:43:57,667 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:43:57,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:43:57,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1032547419, now seen corresponding path program 8 times [2022-11-25 15:43:57,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:43:57,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749998316] [2022-11-25 15:43:57,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:57,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:43:57,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:01,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-11-25 15:44:01,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:01,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-11-25 15:44:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:01,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-11-25 15:44:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:01,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5676 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2022-11-25 15:44:01,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:44:01,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749998316] [2022-11-25 15:44:01,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749998316] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:44:01,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052512784] [2022-11-25 15:44:01,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:44:01,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:01,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:44:01,781 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:44:01,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 15:44:02,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:44:02,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:44:02,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-25 15:44:02,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:44:02,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5676 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2022-11-25 15:44:02,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:44:04,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5676 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2022-11-25 15:44:04,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052512784] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:44:04,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:44:04,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 63 [2022-11-25 15:44:04,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976818229] [2022-11-25 15:44:04,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:44:04,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-25 15:44:04,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:44:04,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-25 15:44:04,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2022-11-25 15:44:04,543 INFO L87 Difference]: Start difference. First operand 181 states and 199 transitions. Second operand has 63 states, 63 states have (on average 2.365079365079365) internal successors, (149), 63 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 15:44:04,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:44:04,814 INFO L93 Difference]: Finished difference Result 263 states and 304 transitions. [2022-11-25 15:44:04,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-25 15:44:04,815 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.365079365079365) internal successors, (149), 63 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 274 [2022-11-25 15:44:04,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:44:04,819 INFO L225 Difference]: With dead ends: 263 [2022-11-25 15:44:04,819 INFO L226 Difference]: Without dead ends: 193 [2022-11-25 15:44:04,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 498 SyntacticMatches, 50 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1691 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2022-11-25 15:44:04,822 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:44:04,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 98 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 15:44:04,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-25 15:44:04,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2022-11-25 15:44:04,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0904255319148937) internal successors, (205), 188 states have internal predecessors, (205), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:44:04,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 211 transitions. [2022-11-25 15:44:04,834 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 211 transitions. Word has length 274 [2022-11-25 15:44:04,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:44:04,836 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 211 transitions. [2022-11-25 15:44:04,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.365079365079365) internal successors, (149), 63 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 15:44:04,836 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 211 transitions. [2022-11-25 15:44:04,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-11-25 15:44:04,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:44:04,842 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:44:04,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 15:44:05,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 15:44:05,049 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:44:05,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:44:05,050 INFO L85 PathProgramCache]: Analyzing trace with hash -33288217, now seen corresponding path program 9 times [2022-11-25 15:44:05,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:44:05,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004030464] [2022-11-25 15:44:05,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:05,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:44:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:05,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-11-25 15:44:05,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:06,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-11-25 15:44:06,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:06,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2022-11-25 15:44:06,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:06,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6360 backedges. 0 proven. 1527 refuted. 0 times theorem prover too weak. 4833 trivial. 0 not checked. [2022-11-25 15:44:06,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:44:06,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004030464] [2022-11-25 15:44:06,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004030464] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:44:06,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2325935] [2022-11-25 15:44:06,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:44:06,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:06,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:44:06,279 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:44:06,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 15:44:06,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-25 15:44:06,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:44:06,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 15:44:06,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:44:06,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6360 backedges. 1242 proven. 36 refuted. 0 times theorem prover too weak. 5082 trivial. 0 not checked. [2022-11-25 15:44:06,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:44:07,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6360 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6324 trivial. 0 not checked. [2022-11-25 15:44:07,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2325935] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:44:07,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:44:07,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 31 [2022-11-25 15:44:07,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995988455] [2022-11-25 15:44:07,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:44:07,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 15:44:07,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:44:07,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 15:44:07,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2022-11-25 15:44:07,154 INFO L87 Difference]: Start difference. First operand 193 states and 211 transitions. Second operand has 31 states, 31 states have (on average 3.2580645161290325) internal successors, (101), 31 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 15:44:07,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:44:07,270 INFO L93 Difference]: Finished difference Result 283 states and 331 transitions. [2022-11-25 15:44:07,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-25 15:44:07,271 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.2580645161290325) internal successors, (101), 31 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 286 [2022-11-25 15:44:07,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:44:07,273 INFO L225 Difference]: With dead ends: 283 [2022-11-25 15:44:07,273 INFO L226 Difference]: Without dead ends: 214 [2022-11-25 15:44:07,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2022-11-25 15:44:07,275 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:44:07,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 137 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:44:07,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-25 15:44:07,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2022-11-25 15:44:07,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.0869565217391304) internal successors, (225), 207 states have internal predecessors, (225), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:44:07,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 231 transitions. [2022-11-25 15:44:07,286 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 231 transitions. Word has length 286 [2022-11-25 15:44:07,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:44:07,286 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 231 transitions. [2022-11-25 15:44:07,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.2580645161290325) internal successors, (101), 31 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 15:44:07,287 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 231 transitions. [2022-11-25 15:44:07,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-11-25 15:44:07,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:44:07,293 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 45, 45, 45, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:44:07,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 15:44:07,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 15:44:07,500 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:44:07,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:44:07,500 INFO L85 PathProgramCache]: Analyzing trace with hash -512401555, now seen corresponding path program 10 times [2022-11-25 15:44:07,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:44:07,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851348487] [2022-11-25 15:44:07,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:07,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:44:07,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:08,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-11-25 15:44:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:08,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-11-25 15:44:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:08,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2022-11-25 15:44:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:08,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6916 backedges. 0 proven. 1748 refuted. 0 times theorem prover too weak. 5168 trivial. 0 not checked. [2022-11-25 15:44:08,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:44:08,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851348487] [2022-11-25 15:44:08,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851348487] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:44:08,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259924947] [2022-11-25 15:44:08,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:44:08,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:08,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:44:08,831 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:44:08,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 15:44:09,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:44:09,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:44:09,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 15:44:09,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:44:09,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6916 backedges. 1418 proven. 330 refuted. 0 times theorem prover too weak. 5168 trivial. 0 not checked. [2022-11-25 15:44:09,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:44:09,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6916 backedges. 1418 proven. 330 refuted. 0 times theorem prover too weak. 5168 trivial. 0 not checked. [2022-11-25 15:44:09,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259924947] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:44:09,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:44:09,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2022-11-25 15:44:09,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638458942] [2022-11-25 15:44:09,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:44:09,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 15:44:09,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:44:09,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 15:44:09,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 15:44:09,918 INFO L87 Difference]: Start difference. First operand 212 states and 231 transitions. Second operand has 34 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 34 states have internal predecessors, (123), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 15:44:10,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:44:10,050 INFO L93 Difference]: Finished difference Result 351 states and 424 transitions. [2022-11-25 15:44:10,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 15:44:10,050 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 34 states have internal predecessors, (123), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 311 [2022-11-25 15:44:10,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:44:10,052 INFO L225 Difference]: With dead ends: 351 [2022-11-25 15:44:10,052 INFO L226 Difference]: Without dead ends: 263 [2022-11-25 15:44:10,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 612 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 15:44:10,055 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 97 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:44:10,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 154 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:44:10,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-11-25 15:44:10,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-11-25 15:44:10,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.1356589147286822) internal successors, (293), 258 states have internal predecessors, (293), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:44:10,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 299 transitions. [2022-11-25 15:44:10,066 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 299 transitions. Word has length 311 [2022-11-25 15:44:10,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:44:10,067 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 299 transitions. [2022-11-25 15:44:10,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 34 states have internal predecessors, (123), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 15:44:10,067 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 299 transitions. [2022-11-25 15:44:10,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2022-11-25 15:44:10,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:44:10,077 INFO L195 NwaCegarLoop]: trace histogram [96, 96, 96, 60, 60, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:44:10,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 15:44:10,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 15:44:10,285 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:44:10,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:44:10,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1295900265, now seen corresponding path program 11 times [2022-11-25 15:44:10,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:44:10,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333331688] [2022-11-25 15:44:10,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:10,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:44:10,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:12,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-11-25 15:44:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:13,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2022-11-25 15:44:13,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:13,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 359 [2022-11-25 15:44:13,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:13,386 INFO L134 CoverageAnalysis]: Checked inductivity of 17779 backedges. 0 proven. 7800 refuted. 0 times theorem prover too weak. 9979 trivial. 0 not checked. [2022-11-25 15:44:13,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:44:13,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333331688] [2022-11-25 15:44:13,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333331688] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:44:13,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149781852] [2022-11-25 15:44:13,387 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:44:13,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:13,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:44:13,389 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:44:13,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b51b9021-e84c-4e46-897f-0bd0127e0c2a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process