./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.unsafe_analog_estimation_convergence.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.unsafe_analog_estimation_convergence.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 0af4734225f8d624097b2f71d989da577cf3312ce2c1d0203423496ca1c15566 --- 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-5e519f3 [2022-11-03 03:30:50,384 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:30:50,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:30:50,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:30:50,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:30:50,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:30:50,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:30:50,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:30:50,421 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:30:50,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:30:50,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:30:50,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:30:50,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:30:50,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:30:50,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:30:50,428 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:30:50,429 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:30:50,430 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:30:50,432 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:30:50,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:30:50,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:30:50,440 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:30:50,441 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:30:50,446 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:30:50,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:30:50,460 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:30:50,460 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:30:50,462 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:30:50,462 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:30:50,463 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:30:50,464 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:30:50,464 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:30:50,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:30:50,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:30:50,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:30:50,467 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:30:50,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:30:50,471 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:30:50,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:30:50,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:30:50,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:30:50,475 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:30:50,516 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:30:50,516 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:30:50,517 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:30:50,517 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:30:50,518 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:30:50,518 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:30:50,518 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:30:50,519 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:30:50,519 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:30:50,519 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:30:50,520 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:30:50,521 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:30:50,521 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:30:50,521 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:30:50,521 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:30:50,522 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:30:50,522 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:30:50,522 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:30:50,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:30:50,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:30:50,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:30:50,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:30:50,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:30:50,524 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:30:50,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:30:50,524 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:30:50,525 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:30:50,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:30:50,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:30:50,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:30:50,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:30:50,526 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:30:50,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:30:50,527 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:30:50,527 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:30:50,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:30:50,527 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:30:50,528 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:30:50,528 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0af4734225f8d624097b2f71d989da577cf3312ce2c1d0203423496ca1c15566 [2022-11-03 03:30:50,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:30:50,908 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:30:50,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:30:50,912 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:30:50,913 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:30:50,914 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.unsafe_analog_estimation_convergence.c [2022-11-03 03:30:51,004 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/data/ce1bcb7da/a22612b522eb4034a187b09e23e0f940/FLAG18d8e14b0 [2022-11-03 03:30:51,625 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:30:51,626 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.unsafe_analog_estimation_convergence.c [2022-11-03 03:30:51,636 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/data/ce1bcb7da/a22612b522eb4034a187b09e23e0f940/FLAG18d8e14b0 [2022-11-03 03:30:51,942 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/data/ce1bcb7da/a22612b522eb4034a187b09e23e0f940 [2022-11-03 03:30:51,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:30:51,948 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:30:51,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:30:51,953 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:30:51,957 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:30:51,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:30:51" (1/1) ... [2022-11-03 03:30:51,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dcb104b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:30:51, skipping insertion in model container [2022-11-03 03:30:51,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:30:51" (1/1) ... [2022-11-03 03:30:51,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:30:52,020 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:30:52,222 WARN L230 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_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.unsafe_analog_estimation_convergence.c[1120,1133] [2022-11-03 03:30:52,374 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:30:52,378 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:30:52,390 WARN L230 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_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.unsafe_analog_estimation_convergence.c[1120,1133] [2022-11-03 03:30:52,471 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:30:52,485 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:30:52,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:30:52 WrapperNode [2022-11-03 03:30:52,485 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:30:52,487 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:30:52,487 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:30:52,487 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:30:52,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:30:52" (1/1) ... [2022-11-03 03:30:52,511 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:30:52" (1/1) ... [2022-11-03 03:30:52,576 INFO L138 Inliner]: procedures = 11, calls = 5, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 405 [2022-11-03 03:30:52,576 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:30:52,577 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:30:52,577 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:30:52,577 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:30:52,587 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:30:52" (1/1) ... [2022-11-03 03:30:52,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:30:52" (1/1) ... [2022-11-03 03:30:52,594 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:30:52" (1/1) ... [2022-11-03 03:30:52,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:30:52" (1/1) ... [2022-11-03 03:30:52,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:30:52" (1/1) ... [2022-11-03 03:30:52,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:30:52" (1/1) ... [2022-11-03 03:30:52,646 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:30:52" (1/1) ... [2022-11-03 03:30:52,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:30:52" (1/1) ... [2022-11-03 03:30:52,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:30:52,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:30:52,663 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:30:52,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:30:52,665 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:30:52" (1/1) ... [2022-11-03 03:30:52,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:30:52,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:30:52,701 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:30:52,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:30:52,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:30:52,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:30:52,775 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 03:30:52,776 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 03:30:53,004 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:30:53,007 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:30:55,101 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:30:55,615 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:30:55,615 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:30:55,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:30:55 BoogieIcfgContainer [2022-11-03 03:30:55,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:30:55,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:30:55,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:30:55,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:30:55,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:30:51" (1/3) ... [2022-11-03 03:30:55,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34d95af0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:30:55, skipping insertion in model container [2022-11-03 03:30:55,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:30:52" (2/3) ... [2022-11-03 03:30:55,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34d95af0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:30:55, skipping insertion in model container [2022-11-03 03:30:55,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:30:55" (3/3) ... [2022-11-03 03:30:55,627 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.unsafe_analog_estimation_convergence.c [2022-11-03 03:30:55,648 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:30:55,648 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:30:55,699 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:30:55,706 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2039bd45, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:30:55,707 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:30:55,711 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:30:55,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 03:30:55,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:55,720 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:55,721 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:55,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:55,726 INFO L85 PathProgramCache]: Analyzing trace with hash 64366208, now seen corresponding path program 1 times [2022-11-03 03:30:55,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:55,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838192568] [2022-11-03 03:30:55,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:55,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:58,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:30:58,245 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 03:31:00,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:31:00,460 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 03:31:00,462 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 03:31:00,464 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 03:31:00,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:31:00,470 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 03:31:00,476 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 03:31:00,544 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 03:31:00,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 03:31:00 BoogieIcfgContainer [2022-11-03 03:31:00,571 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 03:31:00,574 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 03:31:00,575 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 03:31:00,575 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 03:31:00,576 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:30:55" (3/4) ... [2022-11-03 03:31:00,580 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 03:31:00,580 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 03:31:00,583 INFO L158 Benchmark]: Toolchain (without parser) took 8633.02ms. Allocated memory was 153.1MB in the beginning and 274.7MB in the end (delta: 121.6MB). Free memory was 116.8MB in the beginning and 174.4MB in the end (delta: -57.5MB). Peak memory consumption was 65.8MB. Max. memory is 16.1GB. [2022-11-03 03:31:00,583 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 88.1MB. Free memory was 58.9MB in the beginning and 58.8MB in the end (delta: 30.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:31:00,585 INFO L158 Benchmark]: CACSL2BoogieTranslator took 532.89ms. Allocated memory is still 153.1MB. Free memory was 116.6MB in the beginning and 118.3MB in the end (delta: -1.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 03:31:00,586 INFO L158 Benchmark]: Boogie Procedure Inliner took 89.83ms. Allocated memory is still 153.1MB. Free memory was 118.3MB in the beginning and 111.3MB in the end (delta: 7.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 03:31:00,592 INFO L158 Benchmark]: Boogie Preprocessor took 84.72ms. Allocated memory is still 153.1MB. Free memory was 111.3MB in the beginning and 107.1MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 03:31:00,592 INFO L158 Benchmark]: RCFGBuilder took 2955.40ms. Allocated memory was 153.1MB in the beginning and 207.6MB in the end (delta: 54.5MB). Free memory was 107.1MB in the beginning and 127.3MB in the end (delta: -20.2MB). Peak memory consumption was 114.1MB. Max. memory is 16.1GB. [2022-11-03 03:31:00,598 INFO L158 Benchmark]: TraceAbstraction took 4951.39ms. Allocated memory was 207.6MB in the beginning and 274.7MB in the end (delta: 67.1MB). Free memory was 126.2MB in the beginning and 174.4MB in the end (delta: -48.1MB). Peak memory consumption was 108.5MB. Max. memory is 16.1GB. [2022-11-03 03:31:00,599 INFO L158 Benchmark]: Witness Printer took 6.52ms. Allocated memory is still 274.7MB. Free memory was 174.4MB in the beginning and 174.4MB in the end (delta: 2.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 03:31:00,602 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 88.1MB. Free memory was 58.9MB in the beginning and 58.8MB in the end (delta: 30.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 532.89ms. Allocated memory is still 153.1MB. Free memory was 116.6MB in the beginning and 118.3MB in the end (delta: -1.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 89.83ms. Allocated memory is still 153.1MB. Free memory was 118.3MB in the beginning and 111.3MB in the end (delta: 7.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 84.72ms. Allocated memory is still 153.1MB. Free memory was 111.3MB in the beginning and 107.1MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 2955.40ms. Allocated memory was 153.1MB in the beginning and 207.6MB in the end (delta: 54.5MB). Free memory was 107.1MB in the beginning and 127.3MB in the end (delta: -20.2MB). Peak memory consumption was 114.1MB. Max. memory is 16.1GB. * TraceAbstraction took 4951.39ms. Allocated memory was 207.6MB in the beginning and 274.7MB in the end (delta: 67.1MB). Free memory was 126.2MB in the beginning and 174.4MB in the end (delta: -48.1MB). Peak memory consumption was 108.5MB. Max. memory is 16.1GB. * Witness Printer took 6.52ms. Allocated memory is still 274.7MB. Free memory was 174.4MB in the beginning and 174.4MB in the end (delta: 2.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 168, overapproximation of bitwiseAnd at line 156, overapproximation of bitwiseComplement at line 283, overapproximation of bitwiseXOr at line 281. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_9 mask_SORT_9 = (SORT_9)-1 >> (sizeof(SORT_9) * 8 - 31); [L29] const SORT_9 msb_SORT_9 = (SORT_9)1 << (31 - 1); [L31] const SORT_11 mask_SORT_11 = (SORT_11)-1 >> (sizeof(SORT_11) * 8 - 16); [L32] const SORT_11 msb_SORT_11 = (SORT_11)1 << (16 - 1); [L34] const SORT_12 mask_SORT_12 = (SORT_12)-1 >> (sizeof(SORT_12) * 8 - 8); [L35] const SORT_12 msb_SORT_12 = (SORT_12)1 << (8 - 1); [L37] const SORT_20 mask_SORT_20 = (SORT_20)-1 >> (sizeof(SORT_20) * 8 - 32); [L38] const SORT_20 msb_SORT_20 = (SORT_20)1 << (32 - 1); [L40] const SORT_23 mask_SORT_23 = (SORT_23)-1 >> (sizeof(SORT_23) * 8 - 17); [L41] const SORT_23 msb_SORT_23 = (SORT_23)1 << (17 - 1); [L43] const SORT_26 mask_SORT_26 = (SORT_26)-1 >> (sizeof(SORT_26) * 8 - 18); [L44] const SORT_26 msb_SORT_26 = (SORT_26)1 << (18 - 1); [L46] const SORT_29 mask_SORT_29 = (SORT_29)-1 >> (sizeof(SORT_29) * 8 - 19); [L47] const SORT_29 msb_SORT_29 = (SORT_29)1 << (19 - 1); [L49] const SORT_32 mask_SORT_32 = (SORT_32)-1 >> (sizeof(SORT_32) * 8 - 20); [L50] const SORT_32 msb_SORT_32 = (SORT_32)1 << (20 - 1); [L52] const SORT_35 mask_SORT_35 = (SORT_35)-1 >> (sizeof(SORT_35) * 8 - 21); [L53] const SORT_35 msb_SORT_35 = (SORT_35)1 << (21 - 1); [L55] const SORT_38 mask_SORT_38 = (SORT_38)-1 >> (sizeof(SORT_38) * 8 - 22); [L56] const SORT_38 msb_SORT_38 = (SORT_38)1 << (22 - 1); [L58] const SORT_41 mask_SORT_41 = (SORT_41)-1 >> (sizeof(SORT_41) * 8 - 23); [L59] const SORT_41 msb_SORT_41 = (SORT_41)1 << (23 - 1); [L61] const SORT_44 mask_SORT_44 = (SORT_44)-1 >> (sizeof(SORT_44) * 8 - 24); [L62] const SORT_44 msb_SORT_44 = (SORT_44)1 << (24 - 1); [L64] const SORT_47 mask_SORT_47 = (SORT_47)-1 >> (sizeof(SORT_47) * 8 - 25); [L65] const SORT_47 msb_SORT_47 = (SORT_47)1 << (25 - 1); [L67] const SORT_50 mask_SORT_50 = (SORT_50)-1 >> (sizeof(SORT_50) * 8 - 26); [L68] const SORT_50 msb_SORT_50 = (SORT_50)1 << (26 - 1); [L70] const SORT_53 mask_SORT_53 = (SORT_53)-1 >> (sizeof(SORT_53) * 8 - 27); [L71] const SORT_53 msb_SORT_53 = (SORT_53)1 << (27 - 1); [L73] const SORT_56 mask_SORT_56 = (SORT_56)-1 >> (sizeof(SORT_56) * 8 - 28); [L74] const SORT_56 msb_SORT_56 = (SORT_56)1 << (28 - 1); [L76] const SORT_59 mask_SORT_59 = (SORT_59)-1 >> (sizeof(SORT_59) * 8 - 29); [L77] const SORT_59 msb_SORT_59 = (SORT_59)1 << (29 - 1); [L79] const SORT_62 mask_SORT_62 = (SORT_62)-1 >> (sizeof(SORT_62) * 8 - 30); [L80] const SORT_62 msb_SORT_62 = (SORT_62)1 << (30 - 1); [L82] const SORT_72 mask_SORT_72 = (SORT_72)-1 >> (sizeof(SORT_72) * 8 - 3); [L83] const SORT_72 msb_SORT_72 = (SORT_72)1 << (3 - 1); [L85] const SORT_96 mask_SORT_96 = (SORT_96)-1 >> (sizeof(SORT_96) * 8 - 4); [L86] const SORT_96 msb_SORT_96 = (SORT_96)1 << (4 - 1); [L88] const SORT_101 mask_SORT_101 = (SORT_101)-1 >> (sizeof(SORT_101) * 8 - 6); [L89] const SORT_101 msb_SORT_101 = (SORT_101)1 << (6 - 1); [L91] const SORT_1 var_7 = 0; [L92] const SORT_1 var_8 = 1; [L93] const SORT_9 var_10 = 0; [L94] const SORT_12 var_13 = 0; [L95] const SORT_12 var_14 = 200; [L96] const SORT_72 var_73 = 5; [L97] const SORT_11 var_75 = 0; [L98] const SORT_11 var_108 = 200; [L99] const SORT_72 var_113 = 4; [L100] const SORT_72 var_116 = 6; [L101] const SORT_96 var_120 = 9; [L102] const SORT_72 var_137 = 0; [L103] const SORT_96 var_140 = 0; [L105] SORT_1 input_2; [L106] SORT_1 input_3; [L107] SORT_1 input_4; [L109] SORT_1 state_5 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L110] SORT_11 state_17 = __VERIFIER_nondet_ushort() & mask_SORT_11; [L111] SORT_11 state_76 = __VERIFIER_nondet_ushort() & mask_SORT_11; [L112] SORT_96 state_97 = __VERIFIER_nondet_uchar() & mask_SORT_96; [L113] SORT_96 state_100 = __VERIFIER_nondet_uchar() & mask_SORT_96; [L115] SORT_11 init_77_arg_1 = var_75; [L116] state_76 = init_77_arg_1 VAL [init_77_arg_1=0, mask_SORT_1=1, mask_SORT_101=63, mask_SORT_11=65535, mask_SORT_12=255, mask_SORT_20=4294967295, mask_SORT_23=4294967295, mask_SORT_26=4294967295, mask_SORT_29=4294967295, mask_SORT_32=4294967295, mask_SORT_35=4294967295, mask_SORT_38=4294967295, mask_SORT_41=4294967295, mask_SORT_44=4294967295, mask_SORT_47=4294967295, mask_SORT_50=4294967295, mask_SORT_53=4294967295, mask_SORT_56=4294967295, mask_SORT_59=4294967295, mask_SORT_62=4294967295, mask_SORT_72=7, mask_SORT_9=4294967295, mask_SORT_96=15, msb_SORT_1=1, msb_SORT_101=32, msb_SORT_11=32768, msb_SORT_12=128, msb_SORT_20=2147483648, msb_SORT_23=65536, msb_SORT_26=131072, msb_SORT_29=262144, msb_SORT_32=524288, msb_SORT_35=1048576, msb_SORT_38=2097152, msb_SORT_41=4194304, msb_SORT_44=8388608, msb_SORT_47=16777216, msb_SORT_50=33554432, msb_SORT_53=67108864, msb_SORT_56=134217728, msb_SORT_59=268435456, msb_SORT_62=536870912, msb_SORT_72=4, msb_SORT_9=1073741824, msb_SORT_96=8, state_100=0, state_17=4, state_5=0, state_76=0, state_97=5, var_10=0, var_108=200, var_113=4, var_116=6, var_120=9, var_13=0, var_137=0, var_14=200, var_140=0, var_7=0, var_73=5, var_75=0, var_8=1] [L119] input_2 = __VERIFIER_nondet_uchar() [L120] input_3 = __VERIFIER_nondet_uchar() [L121] input_3 = input_3 & mask_SORT_1 [L122] input_4 = __VERIFIER_nondet_uchar() [L123] input_4 = input_4 & mask_SORT_1 [L125] SORT_1 var_84_arg_0 = state_5; [L126] SORT_1 var_84 = ~var_84_arg_0; [L127] SORT_1 var_85_arg_0 = var_84; [L128] SORT_1 var_85 = ~var_85_arg_0; [L129] SORT_1 var_86_arg_0 = state_5; [L130] SORT_1 var_86_arg_1 = var_85; [L131] SORT_1 var_86 = var_86_arg_0 | var_86_arg_1; [L132] var_86 = var_86 & mask_SORT_1 [L133] SORT_1 constr_87_arg_0 = var_86; VAL [constr_87_arg_0=1, init_77_arg_1=0, input_2=1, input_3=1, input_4=1, mask_SORT_1=1, mask_SORT_101=63, mask_SORT_11=65535, mask_SORT_12=255, mask_SORT_20=4294967295, mask_SORT_23=4294967295, mask_SORT_26=4294967295, mask_SORT_29=4294967295, mask_SORT_32=4294967295, mask_SORT_35=4294967295, mask_SORT_38=4294967295, mask_SORT_41=4294967295, mask_SORT_44=4294967295, mask_SORT_47=4294967295, mask_SORT_50=4294967295, mask_SORT_53=4294967295, mask_SORT_56=4294967295, mask_SORT_59=4294967295, mask_SORT_62=4294967295, mask_SORT_72=7, mask_SORT_9=4294967295, mask_SORT_96=15, msb_SORT_1=1, msb_SORT_101=32, msb_SORT_11=32768, msb_SORT_12=128, msb_SORT_20=2147483648, msb_SORT_23=65536, msb_SORT_26=131072, msb_SORT_29=262144, msb_SORT_32=524288, msb_SORT_35=1048576, msb_SORT_38=2097152, msb_SORT_41=4194304, msb_SORT_44=8388608, msb_SORT_47=16777216, msb_SORT_50=33554432, msb_SORT_53=67108864, msb_SORT_56=134217728, msb_SORT_59=268435456, msb_SORT_62=536870912, msb_SORT_72=4, msb_SORT_9=1073741824, msb_SORT_96=8, state_100=0, state_17=4, state_5=0, state_76=0, state_97=5, var_10=0, var_108=200, var_113=4, var_116=6, var_120=9, var_13=0, var_137=0, var_14=200, var_140=0, var_7=0, var_73=5, var_75=0, var_8=1, var_84=2, var_84_arg_0=0, var_85=1, var_85_arg_0=2, var_86=1, var_86_arg_0=0, var_86_arg_1=1] [L134] CALL assume_abort_if_not(constr_87_arg_0) VAL [\old(cond)=1] [L21] COND FALSE !(!cond) [L134] RET assume_abort_if_not(constr_87_arg_0) VAL [constr_87_arg_0=1, init_77_arg_1=0, input_2=1, input_3=1, input_4=1, mask_SORT_1=1, mask_SORT_101=63, mask_SORT_11=65535, mask_SORT_12=255, mask_SORT_20=4294967295, mask_SORT_23=4294967295, mask_SORT_26=4294967295, mask_SORT_29=4294967295, mask_SORT_32=4294967295, mask_SORT_35=4294967295, mask_SORT_38=4294967295, mask_SORT_41=4294967295, mask_SORT_44=4294967295, mask_SORT_47=4294967295, mask_SORT_50=4294967295, mask_SORT_53=4294967295, mask_SORT_56=4294967295, mask_SORT_59=4294967295, mask_SORT_62=4294967295, mask_SORT_72=7, mask_SORT_9=4294967295, mask_SORT_96=15, msb_SORT_1=1, msb_SORT_101=32, msb_SORT_11=32768, msb_SORT_12=128, msb_SORT_20=2147483648, msb_SORT_23=65536, msb_SORT_26=131072, msb_SORT_29=262144, msb_SORT_32=524288, msb_SORT_35=1048576, msb_SORT_38=2097152, msb_SORT_41=4194304, msb_SORT_44=8388608, msb_SORT_47=16777216, msb_SORT_50=33554432, msb_SORT_53=67108864, msb_SORT_56=134217728, msb_SORT_59=268435456, msb_SORT_62=536870912, msb_SORT_72=4, msb_SORT_9=1073741824, msb_SORT_96=8, state_100=0, state_17=4, state_5=0, state_76=0, state_97=5, var_10=0, var_108=200, var_113=4, var_116=6, var_120=9, var_13=0, var_137=0, var_14=200, var_140=0, var_7=0, var_73=5, var_75=0, var_8=1, var_84=2, var_84_arg_0=0, var_85=1, var_85_arg_0=2, var_86=1, var_86_arg_0=0, var_86_arg_1=1] [L135] SORT_1 var_88_arg_0 = var_8; [L136] var_88_arg_0 = var_88_arg_0 & mask_SORT_1 [L137] SORT_11 var_88 = var_88_arg_0; [L138] SORT_11 var_89_arg_0 = state_76; [L139] SORT_11 var_89_arg_1 = var_88; [L140] SORT_1 var_89 = var_89_arg_0 <= var_89_arg_1; [L141] SORT_1 var_90_arg_0 = input_4; [L142] SORT_1 var_90_arg_1 = var_89; [L143] SORT_1 var_90 = var_90_arg_0 ^ var_90_arg_1; [L144] SORT_1 var_91_arg_0 = var_90; [L145] SORT_1 var_91 = ~var_91_arg_0; [L146] SORT_1 var_92_arg_0 = var_90; [L147] SORT_1 var_92 = ~var_92_arg_0; [L148] SORT_1 var_93_arg_0 = var_91; [L149] SORT_1 var_93_arg_1 = var_92; [L150] SORT_1 var_93 = var_93_arg_0 | var_93_arg_1; [L151] var_93 = var_93 & mask_SORT_1 [L152] SORT_1 constr_94_arg_0 = var_93; VAL [constr_87_arg_0=1, constr_94_arg_0=1, init_77_arg_1=0, input_2=1, input_3=1, input_4=1, mask_SORT_1=1, mask_SORT_101=63, mask_SORT_11=65535, mask_SORT_12=255, mask_SORT_20=4294967295, mask_SORT_23=4294967295, mask_SORT_26=4294967295, mask_SORT_29=4294967295, mask_SORT_32=4294967295, mask_SORT_35=4294967295, mask_SORT_38=4294967295, mask_SORT_41=4294967295, mask_SORT_44=4294967295, mask_SORT_47=4294967295, mask_SORT_50=4294967295, mask_SORT_53=4294967295, mask_SORT_56=4294967295, mask_SORT_59=4294967295, mask_SORT_62=4294967295, mask_SORT_72=7, mask_SORT_9=4294967295, mask_SORT_96=15, msb_SORT_1=1, msb_SORT_101=32, msb_SORT_11=32768, msb_SORT_12=128, msb_SORT_20=2147483648, msb_SORT_23=65536, msb_SORT_26=131072, msb_SORT_29=262144, msb_SORT_32=524288, msb_SORT_35=1048576, msb_SORT_38=2097152, msb_SORT_41=4194304, msb_SORT_44=8388608, msb_SORT_47=16777216, msb_SORT_50=33554432, msb_SORT_53=67108864, msb_SORT_56=134217728, msb_SORT_59=268435456, msb_SORT_62=536870912, msb_SORT_72=4, msb_SORT_9=1073741824, msb_SORT_96=8, state_100=0, state_17=4, state_5=0, state_76=0, state_97=5, var_10=0, var_108=200, var_113=4, var_116=6, var_120=9, var_13=0, var_137=0, var_14=200, var_140=0, var_7=0, var_73=5, var_75=0, var_8=1, var_84=2, var_84_arg_0=0, var_85=1, var_85_arg_0=2, var_86=1, var_86_arg_0=0, var_86_arg_1=1, var_88=1, var_88_arg_0=1, var_89=1, var_89_arg_0=0, var_89_arg_1=1, var_90=0, var_90_arg_0=1, var_90_arg_1=1, var_91=255, var_91_arg_0=0, var_92=1, var_92_arg_0=0, var_93=1, var_93_arg_0=255, var_93_arg_1=1] [L153] CALL assume_abort_if_not(constr_94_arg_0) VAL [\old(cond)=1] [L21] COND FALSE !(!cond) [L153] RET assume_abort_if_not(constr_94_arg_0) VAL [constr_87_arg_0=1, constr_94_arg_0=1, init_77_arg_1=0, input_2=1, input_3=1, input_4=1, mask_SORT_1=1, mask_SORT_101=63, mask_SORT_11=65535, mask_SORT_12=255, mask_SORT_20=4294967295, mask_SORT_23=4294967295, mask_SORT_26=4294967295, mask_SORT_29=4294967295, mask_SORT_32=4294967295, mask_SORT_35=4294967295, mask_SORT_38=4294967295, mask_SORT_41=4294967295, mask_SORT_44=4294967295, mask_SORT_47=4294967295, mask_SORT_50=4294967295, mask_SORT_53=4294967295, mask_SORT_56=4294967295, mask_SORT_59=4294967295, mask_SORT_62=4294967295, mask_SORT_72=7, mask_SORT_9=4294967295, mask_SORT_96=15, msb_SORT_1=1, msb_SORT_101=32, msb_SORT_11=32768, msb_SORT_12=128, msb_SORT_20=2147483648, msb_SORT_23=65536, msb_SORT_26=131072, msb_SORT_29=262144, msb_SORT_32=524288, msb_SORT_35=1048576, msb_SORT_38=2097152, msb_SORT_41=4194304, msb_SORT_44=8388608, msb_SORT_47=16777216, msb_SORT_50=33554432, msb_SORT_53=67108864, msb_SORT_56=134217728, msb_SORT_59=268435456, msb_SORT_62=536870912, msb_SORT_72=4, msb_SORT_9=1073741824, msb_SORT_96=8, state_100=0, state_17=4, state_5=0, state_76=0, state_97=5, var_10=0, var_108=200, var_113=4, var_116=6, var_120=9, var_13=0, var_137=0, var_14=200, var_140=0, var_7=0, var_73=5, var_75=0, var_8=1, var_84=2, var_84_arg_0=0, var_85=1, var_85_arg_0=2, var_86=1, var_86_arg_0=0, var_86_arg_1=1, var_88=1, var_88_arg_0=1, var_89=1, var_89_arg_0=0, var_89_arg_1=1, var_90=0, var_90_arg_0=1, var_90_arg_1=1, var_91=255, var_91_arg_0=0, var_92=1, var_92_arg_0=0, var_93=1, var_93_arg_0=255, var_93_arg_1=1] [L155] SORT_72 var_74_arg_0 = var_73; [L156] var_74_arg_0 = var_74_arg_0 & mask_SORT_72 [L157] SORT_11 var_74 = var_74_arg_0; [L158] SORT_11 var_78_arg_0 = var_74; [L159] SORT_11 var_78_arg_1 = state_76; [L160] SORT_1 var_78 = var_78_arg_0 < var_78_arg_1; [L161] SORT_1 var_15_arg_0 = input_3; [L162] SORT_12 var_15_arg_1 = var_14; [L163] SORT_12 var_15_arg_2 = var_13; [L164] EXPR var_15_arg_0 ? var_15_arg_1 : var_15_arg_2 [L164] SORT_12 var_15 = var_15_arg_0 ? var_15_arg_1 : var_15_arg_2; [L165] var_15 = var_15 & mask_SORT_12 [L166] SORT_12 var_16_arg_0 = var_13; [L167] SORT_12 var_16_arg_1 = var_15; [L168] SORT_11 var_16 = ((SORT_11)var_16_arg_0 << 8) | var_16_arg_1; [L169] SORT_11 var_18_arg_0 = var_16; [L170] SORT_11 var_18_arg_1 = state_17; [L171] SORT_11 var_18 = var_18_arg_0 - var_18_arg_1; [L172] var_18 = var_18 & mask_SORT_11 [L173] SORT_11 var_19_arg_0 = var_18; [L174] SORT_1 var_19 = var_19_arg_0 >> 15; [L175] SORT_1 var_21_arg_0 = var_19; [L176] SORT_9 var_21_arg_1 = var_10; [L177] SORT_20 var_21 = ((SORT_20)var_21_arg_0 << 31) | var_21_arg_1; [L178] var_21 = var_21 & mask_SORT_20 [L179] SORT_11 var_64_arg_0 = var_18; [L180] SORT_1 var_64 = var_64_arg_0 >> 15; [L181] SORT_11 var_61_arg_0 = var_18; [L182] SORT_1 var_61 = var_61_arg_0 >> 15; [L183] SORT_11 var_58_arg_0 = var_18; [L184] SORT_1 var_58 = var_58_arg_0 >> 15; [L185] SORT_11 var_55_arg_0 = var_18; [L186] SORT_1 var_55 = var_55_arg_0 >> 15; [L187] SORT_11 var_52_arg_0 = var_18; [L188] SORT_1 var_52 = var_52_arg_0 >> 15; [L189] SORT_11 var_49_arg_0 = var_18; [L190] SORT_1 var_49 = var_49_arg_0 >> 15; [L191] SORT_11 var_46_arg_0 = var_18; [L192] SORT_1 var_46 = var_46_arg_0 >> 15; [L193] SORT_11 var_43_arg_0 = var_18; [L194] SORT_1 var_43 = var_43_arg_0 >> 15; [L195] SORT_11 var_40_arg_0 = var_18; [L196] SORT_1 var_40 = var_40_arg_0 >> 15; [L197] SORT_11 var_37_arg_0 = var_18; [L198] SORT_1 var_37 = var_37_arg_0 >> 15; [L199] SORT_11 var_34_arg_0 = var_18; [L200] SORT_1 var_34 = var_34_arg_0 >> 15; [L201] SORT_11 var_31_arg_0 = var_18; [L202] SORT_1 var_31 = var_31_arg_0 >> 15; [L203] SORT_11 var_28_arg_0 = var_18; [L204] SORT_1 var_28 = var_28_arg_0 >> 15; [L205] SORT_11 var_25_arg_0 = var_18; [L206] SORT_1 var_25 = var_25_arg_0 >> 15; [L207] SORT_11 var_22_arg_0 = var_18; [L208] SORT_1 var_22 = var_22_arg_0 >> 15; [L209] SORT_1 var_24_arg_0 = var_22; [L210] SORT_11 var_24_arg_1 = var_18; [L211] SORT_23 var_24 = ((SORT_23)var_24_arg_0 << 16) | var_24_arg_1; [L212] var_24 = var_24 & mask_SORT_23 [L213] SORT_1 var_27_arg_0 = var_25; [L214] SORT_23 var_27_arg_1 = var_24; [L215] SORT_26 var_27 = ((SORT_26)var_27_arg_0 << 17) | var_27_arg_1; [L216] var_27 = var_27 & mask_SORT_26 [L217] SORT_1 var_30_arg_0 = var_28; [L218] SORT_26 var_30_arg_1 = var_27; [L219] SORT_29 var_30 = ((SORT_29)var_30_arg_0 << 18) | var_30_arg_1; [L220] var_30 = var_30 & mask_SORT_29 [L221] SORT_1 var_33_arg_0 = var_31; [L222] SORT_29 var_33_arg_1 = var_30; [L223] SORT_32 var_33 = ((SORT_32)var_33_arg_0 << 19) | var_33_arg_1; [L224] var_33 = var_33 & mask_SORT_32 [L225] SORT_1 var_36_arg_0 = var_34; [L226] SORT_32 var_36_arg_1 = var_33; [L227] SORT_35 var_36 = ((SORT_35)var_36_arg_0 << 20) | var_36_arg_1; [L228] var_36 = var_36 & mask_SORT_35 [L229] SORT_1 var_39_arg_0 = var_37; [L230] SORT_35 var_39_arg_1 = var_36; [L231] SORT_38 var_39 = ((SORT_38)var_39_arg_0 << 21) | var_39_arg_1; [L232] var_39 = var_39 & mask_SORT_38 [L233] SORT_1 var_42_arg_0 = var_40; [L234] SORT_38 var_42_arg_1 = var_39; [L235] SORT_41 var_42 = ((SORT_41)var_42_arg_0 << 22) | var_42_arg_1; [L236] var_42 = var_42 & mask_SORT_41 [L237] SORT_1 var_45_arg_0 = var_43; [L238] SORT_41 var_45_arg_1 = var_42; [L239] SORT_44 var_45 = ((SORT_44)var_45_arg_0 << 23) | var_45_arg_1; [L240] var_45 = var_45 & mask_SORT_44 [L241] SORT_1 var_48_arg_0 = var_46; [L242] SORT_44 var_48_arg_1 = var_45; [L243] SORT_47 var_48 = ((SORT_47)var_48_arg_0 << 24) | var_48_arg_1; [L244] var_48 = var_48 & mask_SORT_47 [L245] SORT_1 var_51_arg_0 = var_49; [L246] SORT_47 var_51_arg_1 = var_48; [L247] SORT_50 var_51 = ((SORT_50)var_51_arg_0 << 25) | var_51_arg_1; [L248] var_51 = var_51 & mask_SORT_50 [L249] SORT_1 var_54_arg_0 = var_52; [L250] SORT_50 var_54_arg_1 = var_51; [L251] SORT_53 var_54 = ((SORT_53)var_54_arg_0 << 26) | var_54_arg_1; [L252] var_54 = var_54 & mask_SORT_53 [L253] SORT_1 var_57_arg_0 = var_55; [L254] SORT_53 var_57_arg_1 = var_54; [L255] SORT_56 var_57 = ((SORT_56)var_57_arg_0 << 27) | var_57_arg_1; [L256] var_57 = var_57 & mask_SORT_56 [L257] SORT_1 var_60_arg_0 = var_58; [L258] SORT_56 var_60_arg_1 = var_57; [L259] SORT_59 var_60 = ((SORT_59)var_60_arg_0 << 28) | var_60_arg_1; [L260] var_60 = var_60 & mask_SORT_59 [L261] SORT_1 var_63_arg_0 = var_61; [L262] SORT_59 var_63_arg_1 = var_60; [L263] SORT_62 var_63 = ((SORT_62)var_63_arg_0 << 29) | var_63_arg_1; [L264] var_63 = var_63 & mask_SORT_62 [L265] SORT_1 var_65_arg_0 = var_64; [L266] SORT_62 var_65_arg_1 = var_63; [L267] SORT_9 var_65 = ((SORT_9)var_65_arg_0 << 30) | var_65_arg_1; [L268] SORT_9 var_66_arg_0 = var_65; [L269] var_66_arg_0 = var_66_arg_0 & mask_SORT_9 [L270] SORT_20 var_66 = var_66_arg_0; [L271] SORT_20 var_67_arg_0 = var_21; [L272] SORT_20 var_67_arg_1 = var_66; [L273] SORT_1 var_67 = var_67_arg_0 <= var_67_arg_1; [L274] SORT_1 var_68_arg_0 = var_67; [L275] SORT_1 var_68_arg_1 = var_8; [L276] SORT_1 var_68_arg_2 = var_7; [L277] EXPR var_68_arg_0 ? var_68_arg_1 : var_68_arg_2 [L277] SORT_1 var_68 = var_68_arg_0 ? var_68_arg_1 : var_68_arg_2; [L278] var_68 = var_68 & mask_SORT_1 [L279] SORT_1 var_69_arg_0 = input_3; [L280] SORT_1 var_69_arg_1 = var_68; [L281] SORT_1 var_69 = var_69_arg_0 ^ var_69_arg_1; [L282] SORT_1 var_70_arg_0 = var_69; [L283] SORT_1 var_70 = ~var_70_arg_0; [L284] SORT_1 var_79_arg_0 = var_78; [L285] SORT_1 var_79_arg_1 = var_70; [L286] SORT_1 var_79_arg_2 = var_8; [L287] EXPR var_79_arg_0 ? var_79_arg_1 : var_79_arg_2 [L287] SORT_1 var_79 = var_79_arg_0 ? var_79_arg_1 : var_79_arg_2; [L288] SORT_1 var_80_arg_0 = var_79; [L289] SORT_1 var_80 = ~var_80_arg_0; [L290] SORT_1 var_81_arg_0 = var_79; [L291] SORT_1 var_81 = ~var_81_arg_0; [L292] SORT_1 var_82_arg_0 = var_80; [L293] SORT_1 var_82_arg_1 = var_81; [L294] SORT_1 var_82 = var_82_arg_0 & var_82_arg_1; [L295] var_82 = var_82 & mask_SORT_1 [L296] SORT_1 bad_83_arg_0 = var_82; [L297] CALL __VERIFIER_assert(!(bad_83_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.8s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 03:31:00,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.unsafe_analog_estimation_convergence.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 0af4734225f8d624097b2f71d989da577cf3312ce2c1d0203423496ca1c15566 --- 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-5e519f3 [2022-11-03 03:31:03,097 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:31:03,099 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:31:03,130 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:31:03,131 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:31:03,132 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:31:03,134 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:31:03,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:31:03,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:31:03,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:31:03,140 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:31:03,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:31:03,142 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:31:03,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:31:03,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:31:03,146 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:31:03,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:31:03,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:31:03,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:31:03,152 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:31:03,153 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:31:03,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:31:03,156 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:31:03,157 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:31:03,161 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:31:03,162 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:31:03,162 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:31:03,163 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:31:03,164 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:31:03,165 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:31:03,165 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:31:03,166 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:31:03,167 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:31:03,168 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:31:03,169 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:31:03,169 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:31:03,170 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:31:03,171 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:31:03,171 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:31:03,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:31:03,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:31:03,174 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 03:31:03,223 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:31:03,226 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:31:03,227 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:31:03,227 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:31:03,229 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:31:03,229 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:31:03,229 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:31:03,229 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:31:03,230 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:31:03,230 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:31:03,231 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:31:03,231 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:31:03,233 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:31:03,233 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:31:03,233 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:31:03,233 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:31:03,233 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:31:03,234 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:31:03,234 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 03:31:03,234 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 03:31:03,234 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:31:03,234 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:31:03,235 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:31:03,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:31:03,235 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 03:31:03,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:31:03,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:31:03,236 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:31:03,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:31:03,236 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:31:03,236 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 03:31:03,236 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 03:31:03,237 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:31:03,237 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:31:03,237 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 03:31:03,237 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0af4734225f8d624097b2f71d989da577cf3312ce2c1d0203423496ca1c15566 [2022-11-03 03:31:03,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:31:03,726 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:31:03,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:31:03,731 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:31:03,732 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:31:03,734 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.unsafe_analog_estimation_convergence.c [2022-11-03 03:31:03,804 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/data/b8b05044e/649eae557e774306a68fe357d57322c0/FLAG27facd8ca [2022-11-03 03:31:04,463 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:31:04,471 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.unsafe_analog_estimation_convergence.c [2022-11-03 03:31:04,487 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/data/b8b05044e/649eae557e774306a68fe357d57322c0/FLAG27facd8ca [2022-11-03 03:31:04,730 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/data/b8b05044e/649eae557e774306a68fe357d57322c0 [2022-11-03 03:31:04,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:31:04,735 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:31:04,736 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:31:04,737 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:31:04,744 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:31:04,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:31:04" (1/1) ... [2022-11-03 03:31:04,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@404b8c06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:04, skipping insertion in model container [2022-11-03 03:31:04,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:31:04" (1/1) ... [2022-11-03 03:31:04,755 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:31:04,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:31:04,955 WARN L230 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_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.unsafe_analog_estimation_convergence.c[1120,1133] [2022-11-03 03:31:05,133 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:31:05,137 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:31:05,149 WARN L230 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_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.unsafe_analog_estimation_convergence.c[1120,1133] [2022-11-03 03:31:05,221 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:31:05,234 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:31:05,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:05 WrapperNode [2022-11-03 03:31:05,235 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:31:05,236 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:31:05,237 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:31:05,237 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:31:05,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:05" (1/1) ... [2022-11-03 03:31:05,259 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:05" (1/1) ... [2022-11-03 03:31:05,324 INFO L138 Inliner]: procedures = 11, calls = 5, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 405 [2022-11-03 03:31:05,331 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:31:05,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:31:05,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:31:05,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:31:05,343 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:05" (1/1) ... [2022-11-03 03:31:05,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:05" (1/1) ... [2022-11-03 03:31:05,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:05" (1/1) ... [2022-11-03 03:31:05,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:05" (1/1) ... [2022-11-03 03:31:05,385 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:05" (1/1) ... [2022-11-03 03:31:05,403 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:05" (1/1) ... [2022-11-03 03:31:05,405 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:05" (1/1) ... [2022-11-03 03:31:05,408 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:05" (1/1) ... [2022-11-03 03:31:05,422 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:31:05,423 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:31:05,423 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:31:05,424 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:31:05,424 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:05" (1/1) ... [2022-11-03 03:31:05,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:31:05,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:05,459 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:31:05,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:31:05,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:31:05,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:31:05,520 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 03:31:05,520 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 03:31:05,749 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:31:05,751 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:31:06,405 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:31:06,413 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:31:06,414 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:31:06,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:31:06 BoogieIcfgContainer [2022-11-03 03:31:06,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:31:06,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:31:06,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:31:06,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:31:06,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:31:04" (1/3) ... [2022-11-03 03:31:06,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75fc63e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:31:06, skipping insertion in model container [2022-11-03 03:31:06,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:31:05" (2/3) ... [2022-11-03 03:31:06,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75fc63e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:31:06, skipping insertion in model container [2022-11-03 03:31:06,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:31:06" (3/3) ... [2022-11-03 03:31:06,438 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.unsafe_analog_estimation_convergence.c [2022-11-03 03:31:06,465 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:31:06,466 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:31:06,563 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:31:06,575 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@13b14e6f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:31:06,575 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:31:06,583 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 37 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:31:06,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 03:31:06,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:06,594 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:06,595 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:06,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:06,603 INFO L85 PathProgramCache]: Analyzing trace with hash 637573395, now seen corresponding path program 1 times [2022-11-03 03:31:06,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:31:06,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212252103] [2022-11-03 03:31:06,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:06,623 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:31:06,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:31:06,630 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:31:06,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 03:31:06,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:06,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 03:31:06,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:07,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:31:07,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:31:07,018 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:31:07,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212252103] [2022-11-03 03:31:07,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212252103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:07,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:31:07,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:31:07,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464036073] [2022-11-03 03:31:07,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:07,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 03:31:07,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:31:07,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 03:31:07,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:31:07,077 INFO L87 Difference]: Start difference. First operand has 41 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 37 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:31:07,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:07,101 INFO L93 Difference]: Finished difference Result 76 states and 109 transitions. [2022-11-03 03:31:07,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 03:31:07,103 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-11-03 03:31:07,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:07,111 INFO L225 Difference]: With dead ends: 76 [2022-11-03 03:31:07,111 INFO L226 Difference]: Without dead ends: 37 [2022-11-03 03:31:07,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:31:07,121 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:07,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:31:07,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-03 03:31:07,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-03 03:31:07,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:31:07,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2022-11-03 03:31:07,178 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 23 [2022-11-03 03:31:07,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:07,179 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2022-11-03 03:31:07,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:31:07,179 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2022-11-03 03:31:07,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 03:31:07,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:07,181 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:07,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:07,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:31:07,402 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:07,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:07,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1098405873, now seen corresponding path program 1 times [2022-11-03 03:31:07,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:31:07,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018620158] [2022-11-03 03:31:07,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:07,404 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:31:07,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:31:07,406 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:31:07,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 03:31:07,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:07,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 03:31:07,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:07,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:31:07,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:31:07,904 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:31:07,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018620158] [2022-11-03 03:31:07,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018620158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:07,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:31:07,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:31:07,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238949551] [2022-11-03 03:31:07,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:07,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:31:07,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:31:07,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:31:07,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:31:07,908 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 03:31:08,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:08,194 INFO L93 Difference]: Finished difference Result 79 states and 108 transitions. [2022-11-03 03:31:08,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:31:08,195 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-11-03 03:31:08,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:08,197 INFO L225 Difference]: With dead ends: 79 [2022-11-03 03:31:08,197 INFO L226 Difference]: Without dead ends: 77 [2022-11-03 03:31:08,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:31:08,199 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 168 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:08,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 160 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:31:08,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-03 03:31:08,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 39. [2022-11-03 03:31:08,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:31:08,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2022-11-03 03:31:08,211 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 23 [2022-11-03 03:31:08,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:08,211 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2022-11-03 03:31:08,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 03:31:08,212 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2022-11-03 03:31:08,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 03:31:08,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:08,213 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:08,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:08,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:31:08,427 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:08,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:08,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1098465455, now seen corresponding path program 1 times [2022-11-03 03:31:08,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:31:08,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586573785] [2022-11-03 03:31:08,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:08,430 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:31:08,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:31:08,435 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:31:08,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 03:31:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:08,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:31:08,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:08,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:31:08,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:31:08,710 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:31:08,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586573785] [2022-11-03 03:31:08,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586573785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:08,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:31:08,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:31:08,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836149415] [2022-11-03 03:31:08,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:08,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:31:08,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:31:08,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:31:08,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:31:08,713 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 03:31:08,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:08,820 INFO L93 Difference]: Finished difference Result 136 states and 187 transitions. [2022-11-03 03:31:08,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:31:08,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-11-03 03:31:08,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:08,832 INFO L225 Difference]: With dead ends: 136 [2022-11-03 03:31:08,832 INFO L226 Difference]: Without dead ends: 99 [2022-11-03 03:31:08,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:31:08,834 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 133 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:08,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 211 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:31:08,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-03 03:31:08,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 49. [2022-11-03 03:31:08,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 03:31:08,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2022-11-03 03:31:08,858 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 23 [2022-11-03 03:31:08,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:08,858 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2022-11-03 03:31:08,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 03:31:08,859 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2022-11-03 03:31:08,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 03:31:08,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:08,864 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:08,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:09,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:31:09,078 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:09,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:09,078 INFO L85 PathProgramCache]: Analyzing trace with hash -613805241, now seen corresponding path program 1 times [2022-11-03 03:31:09,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:31:09,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [292573266] [2022-11-03 03:31:09,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:09,080 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:31:09,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:31:09,083 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:31:09,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 03:31:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:09,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:31:09,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:09,565 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:31:09,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:31:09,565 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:31:09,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [292573266] [2022-11-03 03:31:09,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [292573266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:09,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:31:09,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:31:09,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785059866] [2022-11-03 03:31:09,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:09,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:31:09,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:31:09,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:31:09,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:31:09,573 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 03:31:09,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:09,996 INFO L93 Difference]: Finished difference Result 147 states and 194 transitions. [2022-11-03 03:31:09,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:31:09,997 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2022-11-03 03:31:09,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:09,998 INFO L225 Difference]: With dead ends: 147 [2022-11-03 03:31:09,999 INFO L226 Difference]: Without dead ends: 110 [2022-11-03 03:31:09,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:31:10,000 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 214 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:10,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 229 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:31:10,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-03 03:31:10,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 63. [2022-11-03 03:31:10,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 57 states have internal predecessors, (75), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 03:31:10,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 83 transitions. [2022-11-03 03:31:10,030 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 83 transitions. Word has length 60 [2022-11-03 03:31:10,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:10,030 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 83 transitions. [2022-11-03 03:31:10,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 03:31:10,031 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 83 transitions. [2022-11-03 03:31:10,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 03:31:10,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:10,032 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:10,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:10,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:31:10,242 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:10,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:10,243 INFO L85 PathProgramCache]: Analyzing trace with hash -541418683, now seen corresponding path program 1 times [2022-11-03 03:31:10,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:31:10,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1997569167] [2022-11-03 03:31:10,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:10,245 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:31:10,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:31:10,247 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:31:10,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 03:31:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:10,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:31:10,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:11,170 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 03:31:11,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:11,467 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:31:11,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1997569167] [2022-11-03 03:31:11,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1997569167] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:31:11,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1317074458] [2022-11-03 03:31:11,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:11,468 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:31:11,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:31:11,471 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:31:11,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-03 03:31:11,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:11,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 03:31:11,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:12,655 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 03:31:12,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:13,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1317074458] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:31:13,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099556545] [2022-11-03 03:31:13,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:13,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:13,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:13,221 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:31:13,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 03:31:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:13,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:31:13,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:13,838 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 03:31:13,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:14,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099556545] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:31:14,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:31:14,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 7] total 16 [2022-11-03 03:31:14,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962659185] [2022-11-03 03:31:14,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:31:14,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 03:31:14,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:31:14,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 03:31:14,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-11-03 03:31:14,024 INFO L87 Difference]: Start difference. First operand 63 states and 83 transitions. Second operand has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 03:31:15,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:15,120 INFO L93 Difference]: Finished difference Result 211 states and 286 transitions. [2022-11-03 03:31:15,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 03:31:15,121 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 60 [2022-11-03 03:31:15,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:15,123 INFO L225 Difference]: With dead ends: 211 [2022-11-03 03:31:15,123 INFO L226 Difference]: Without dead ends: 162 [2022-11-03 03:31:15,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=315, Invalid=1941, Unknown=0, NotChecked=0, Total=2256 [2022-11-03 03:31:15,125 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 70 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:15,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 670 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 181 Unchecked, 0.1s Time] [2022-11-03 03:31:15,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-03 03:31:15,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 147. [2022-11-03 03:31:15,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 137 states have (on average 1.3284671532846715) internal successors, (182), 137 states have internal predecessors, (182), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 03:31:15,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 198 transitions. [2022-11-03 03:31:15,147 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 198 transitions. Word has length 60 [2022-11-03 03:31:15,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:15,148 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 198 transitions. [2022-11-03 03:31:15,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 03:31:15,149 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 198 transitions. [2022-11-03 03:31:15,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 03:31:15,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:15,151 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:15,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:15,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:15,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-03 03:31:15,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:15,775 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:15,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:15,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1350765309, now seen corresponding path program 1 times [2022-11-03 03:31:15,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:31:15,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448920565] [2022-11-03 03:31:15,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:15,778 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:31:15,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:31:15,782 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:31:15,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 03:31:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:16,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:31:16,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:16,510 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 03:31:16,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:16,759 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:31:16,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448920565] [2022-11-03 03:31:16,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448920565] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:31:16,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2096619101] [2022-11-03 03:31:16,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:16,760 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:31:16,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:31:16,762 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:31:16,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-03 03:31:17,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:17,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 03:31:17,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 03:31:17,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:17,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2096619101] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:31:17,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247153173] [2022-11-03 03:31:17,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:17,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:17,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:17,977 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:31:17,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 03:31:18,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:18,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:31:18,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 03:31:18,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:18,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247153173] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:31:18,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:31:18,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 10 [2022-11-03 03:31:18,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101827517] [2022-11-03 03:31:18,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:31:18,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 03:31:18,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:31:18,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 03:31:18,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:31:18,769 INFO L87 Difference]: Start difference. First operand 147 states and 198 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-03 03:31:18,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:18,982 INFO L93 Difference]: Finished difference Result 306 states and 414 transitions. [2022-11-03 03:31:18,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:31:18,985 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 60 [2022-11-03 03:31:18,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:18,987 INFO L225 Difference]: With dead ends: 306 [2022-11-03 03:31:18,987 INFO L226 Difference]: Without dead ends: 257 [2022-11-03 03:31:18,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:31:18,988 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 157 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:18,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 305 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 62 Unchecked, 0.1s Time] [2022-11-03 03:31:18,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-11-03 03:31:19,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 186. [2022-11-03 03:31:19,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 174 states have (on average 1.3275862068965518) internal successors, (231), 174 states have internal predecessors, (231), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-03 03:31:19,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 251 transitions. [2022-11-03 03:31:19,045 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 251 transitions. Word has length 60 [2022-11-03 03:31:19,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:19,050 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 251 transitions. [2022-11-03 03:31:19,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-03 03:31:19,051 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 251 transitions. [2022-11-03 03:31:19,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-03 03:31:19,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:19,053 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:19,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:19,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:19,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:19,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:31:19,675 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:19,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:19,676 INFO L85 PathProgramCache]: Analyzing trace with hash 76192015, now seen corresponding path program 1 times [2022-11-03 03:31:19,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:31:19,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1719223970] [2022-11-03 03:31:19,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:19,677 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:31:19,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:31:19,679 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:31:19,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 03:31:20,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:20,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:31:20,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 71 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 03:31:20,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:20,458 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:31:20,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1719223970] [2022-11-03 03:31:20,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1719223970] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:31:20,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1158464411] [2022-11-03 03:31:20,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:20,460 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:31:20,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:31:20,461 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:31:20,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-03 03:31:21,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:21,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 03:31:21,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:21,812 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-03 03:31:21,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:21,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1158464411] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:31:21,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066126162] [2022-11-03 03:31:21,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:21,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:21,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:21,966 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:31:21,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 03:31:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:22,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 03:31:22,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:22,635 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 71 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 03:31:22,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:22,878 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 39 proven. 14 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 03:31:22,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066126162] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:22,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-03 03:31:22,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7, 7] total 20 [2022-11-03 03:31:22,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107844656] [2022-11-03 03:31:22,879 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-03 03:31:22,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 03:31:22,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:31:22,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 03:31:22,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-11-03 03:31:22,882 INFO L87 Difference]: Start difference. First operand 186 states and 251 transitions. Second operand has 20 states, 20 states have (on average 9.25) internal successors, (185), 20 states have internal predecessors, (185), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-11-03 03:31:26,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:26,081 INFO L93 Difference]: Finished difference Result 1176 states and 1612 transitions. [2022-11-03 03:31:26,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-03 03:31:26,085 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 9.25) internal successors, (185), 20 states have internal predecessors, (185), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 97 [2022-11-03 03:31:26,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:26,090 INFO L225 Difference]: With dead ends: 1176 [2022-11-03 03:31:26,090 INFO L226 Difference]: Without dead ends: 1084 [2022-11-03 03:31:26,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1311, Invalid=3945, Unknown=0, NotChecked=0, Total=5256 [2022-11-03 03:31:26,095 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 727 mSDsluCounter, 1344 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 1521 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:26,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [727 Valid, 1521 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 03:31:26,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2022-11-03 03:31:26,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 362. [2022-11-03 03:31:26,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 326 states have (on average 1.2914110429447854) internal successors, (421), 326 states have internal predecessors, (421), 34 states have call successors, (34), 1 states have call predecessors, (34), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-03 03:31:26,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 489 transitions. [2022-11-03 03:31:26,187 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 489 transitions. Word has length 97 [2022-11-03 03:31:26,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:26,187 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 489 transitions. [2022-11-03 03:31:26,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.25) internal successors, (185), 20 states have internal predecessors, (185), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-11-03 03:31:26,188 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 489 transitions. [2022-11-03 03:31:26,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-03 03:31:26,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:26,192 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:26,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:26,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:26,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:26,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:31:26,815 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:26,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:26,815 INFO L85 PathProgramCache]: Analyzing trace with hash -130881391, now seen corresponding path program 1 times [2022-11-03 03:31:26,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:31:26,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2012562400] [2022-11-03 03:31:26,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:26,817 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:31:26,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:31:26,819 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:31:26,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 03:31:27,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:27,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:31:27,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 63 proven. 22 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 03:31:27,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:27,597 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:31:27,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2012562400] [2022-11-03 03:31:27,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2012562400] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:31:27,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [316042143] [2022-11-03 03:31:27,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:27,598 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:31:27,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:31:27,599 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:31:27,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-03 03:31:28,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:28,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:31:28,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:28,101 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-03 03:31:28,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:31:28,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [316042143] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:28,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:31:28,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-11-03 03:31:28,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146514567] [2022-11-03 03:31:28,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:28,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:31:28,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:31:28,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:31:28,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:31:28,107 INFO L87 Difference]: Start difference. First operand 362 states and 489 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 03:31:28,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:28,351 INFO L93 Difference]: Finished difference Result 1288 states and 1747 transitions. [2022-11-03 03:31:28,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:31:28,353 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 97 [2022-11-03 03:31:28,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:28,358 INFO L225 Difference]: With dead ends: 1288 [2022-11-03 03:31:28,358 INFO L226 Difference]: Without dead ends: 990 [2022-11-03 03:31:28,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:31:28,361 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 129 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:28,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 297 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:31:28,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-11-03 03:31:28,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 418. [2022-11-03 03:31:28,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 382 states have (on average 1.2905759162303665) internal successors, (493), 382 states have internal predecessors, (493), 34 states have call successors, (34), 1 states have call predecessors, (34), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-03 03:31:28,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 561 transitions. [2022-11-03 03:31:28,464 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 561 transitions. Word has length 97 [2022-11-03 03:31:28,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:28,465 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 561 transitions. [2022-11-03 03:31:28,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 03:31:28,465 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 561 transitions. [2022-11-03 03:31:28,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-03 03:31:28,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:28,468 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:28,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:28,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:28,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:31:28,886 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:28,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:28,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1255322003, now seen corresponding path program 1 times [2022-11-03 03:31:28,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:31:28,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478881359] [2022-11-03 03:31:28,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:28,888 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:31:28,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:31:28,889 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:31:28,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 03:31:29,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:29,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:31:29,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:29,481 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 59 proven. 26 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 03:31:29,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:29,708 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:31:29,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478881359] [2022-11-03 03:31:29,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478881359] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:31:29,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [815162277] [2022-11-03 03:31:29,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:29,708 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:31:29,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:31:29,709 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:31:29,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-03 03:31:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:30,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:31:30,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:30,160 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-03 03:31:30,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:31:30,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [815162277] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:31:30,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:31:30,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-11-03 03:31:30,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618169356] [2022-11-03 03:31:30,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:30,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:31:30,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:31:30,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:31:30,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:31:30,163 INFO L87 Difference]: Start difference. First operand 418 states and 561 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 03:31:30,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:30,435 INFO L93 Difference]: Finished difference Result 1300 states and 1747 transitions. [2022-11-03 03:31:30,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:31:30,436 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 97 [2022-11-03 03:31:30,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:30,441 INFO L225 Difference]: With dead ends: 1300 [2022-11-03 03:31:30,441 INFO L226 Difference]: Without dead ends: 990 [2022-11-03 03:31:30,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:31:30,443 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 129 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:30,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 314 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:31:30,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-11-03 03:31:30,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 450. [2022-11-03 03:31:30,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 414 states have (on average 1.28743961352657) internal successors, (533), 414 states have internal predecessors, (533), 34 states have call successors, (34), 1 states have call predecessors, (34), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-03 03:31:30,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 601 transitions. [2022-11-03 03:31:30,516 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 601 transitions. Word has length 97 [2022-11-03 03:31:30,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:30,517 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 601 transitions. [2022-11-03 03:31:30,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 03:31:30,517 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 601 transitions. [2022-11-03 03:31:30,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-03 03:31:30,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:30,520 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:30,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:30,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-11-03 03:31:30,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:31:30,924 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:30,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:30,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1395870613, now seen corresponding path program 1 times [2022-11-03 03:31:30,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:31:30,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681761198] [2022-11-03 03:31:30,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:30,926 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:31:30,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:31:30,927 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:31:30,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 03:31:31,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:31,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 03:31:31,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:32,034 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 03:31:32,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:32,667 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:31:32,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681761198] [2022-11-03 03:31:32,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681761198] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:31:32,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1010283575] [2022-11-03 03:31:32,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:32,668 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:31:32,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:31:32,671 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:31:32,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-03 03:31:33,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:33,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 03:31:33,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 03:31:34,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:34,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1010283575] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:31:34,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753824016] [2022-11-03 03:31:34,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:34,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:34,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:34,603 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:31:34,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-03 03:31:34,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:34,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 03:31:34,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 03:31:35,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:35,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753824016] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:31:35,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:31:35,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 12 [2022-11-03 03:31:35,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863206608] [2022-11-03 03:31:35,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:31:35,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 03:31:35,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:31:35,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 03:31:35,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:31:35,889 INFO L87 Difference]: Start difference. First operand 450 states and 601 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 12 states have internal predecessors, (93), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 03:31:36,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:36,630 INFO L93 Difference]: Finished difference Result 1064 states and 1421 transitions. [2022-11-03 03:31:36,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 03:31:36,631 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 12 states have internal predecessors, (93), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 97 [2022-11-03 03:31:36,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:36,634 INFO L225 Difference]: With dead ends: 1064 [2022-11-03 03:31:36,635 INFO L226 Difference]: Without dead ends: 942 [2022-11-03 03:31:36,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 525 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2022-11-03 03:31:36,636 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 388 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:36,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 526 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 125 Invalid, 0 Unknown, 107 Unchecked, 0.3s Time] [2022-11-03 03:31:36,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2022-11-03 03:31:36,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 666. [2022-11-03 03:31:36,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 614 states have (on average 1.278501628664495) internal successors, (785), 614 states have internal predecessors, (785), 50 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2022-11-03 03:31:36,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 885 transitions. [2022-11-03 03:31:36,747 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 885 transitions. Word has length 97 [2022-11-03 03:31:36,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:36,748 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 885 transitions. [2022-11-03 03:31:36,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 12 states have internal predecessors, (93), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 03:31:36,749 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 885 transitions. [2022-11-03 03:31:36,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 03:31:36,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:36,755 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:36,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:36,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:37,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:37,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:31:37,372 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:37,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:37,373 INFO L85 PathProgramCache]: Analyzing trace with hash 720898115, now seen corresponding path program 2 times [2022-11-03 03:31:37,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:31:37,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [472027307] [2022-11-03 03:31:37,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:31:37,374 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:31:37,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:31:37,375 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:31:37,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 03:31:37,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:31:37,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:31:37,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 03:31:37,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:38,778 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 125 proven. 61 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 03:31:38,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:40,410 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:31:40,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [472027307] [2022-11-03 03:31:40,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [472027307] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:31:40,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [687797473] [2022-11-03 03:31:40,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:31:40,411 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:31:40,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:31:40,412 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:31:40,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-03 03:31:41,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:31:41,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:31:41,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-03 03:31:41,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:43,705 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 6 proven. 117 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-03 03:31:43,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:44,902 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 6 proven. 117 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-03 03:31:44,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [687797473] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:44,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610511419] [2022-11-03 03:31:44,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:31:44,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:44,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:44,903 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:31:44,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-03 03:31:45,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:31:45,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:31:45,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-03 03:31:45,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:47,853 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 6 proven. 117 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-03 03:31:47,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:50,123 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 6 proven. 117 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-03 03:31:50,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610511419] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:50,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 5 imperfect interpolant sequences. [2022-11-03 03:31:50,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11, 15, 16] total 50 [2022-11-03 03:31:50,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109437989] [2022-11-03 03:31:50,125 INFO L85 oduleStraightlineAll]: Using 5 imperfect interpolants to construct interpolant automaton [2022-11-03 03:31:50,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-03 03:31:50,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:31:50,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-03 03:31:50,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=2990, Unknown=0, NotChecked=0, Total=3306 [2022-11-03 03:31:50,128 INFO L87 Difference]: Start difference. First operand 666 states and 885 transitions. Second operand has 50 states, 49 states have (on average 8.714285714285714) internal successors, (427), 50 states have internal predecessors, (427), 20 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2022-11-03 03:31:53,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:53,418 INFO L93 Difference]: Finished difference Result 1168 states and 1553 transitions. [2022-11-03 03:31:53,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 03:31:53,420 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 8.714285714285714) internal successors, (427), 50 states have internal predecessors, (427), 20 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) Word has length 134 [2022-11-03 03:31:53,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:53,423 INFO L225 Difference]: With dead ends: 1168 [2022-11-03 03:31:53,423 INFO L226 Difference]: Without dead ends: 938 [2022-11-03 03:31:53,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 767 GetRequests, 693 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=686, Invalid=4570, Unknown=0, NotChecked=0, Total=5256 [2022-11-03 03:31:53,425 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 580 mSDsluCounter, 2050 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 2116 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:53,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [582 Valid, 2116 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 942 Invalid, 0 Unknown, 202 Unchecked, 1.7s Time] [2022-11-03 03:31:53,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-11-03 03:31:53,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 714. [2022-11-03 03:31:53,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 662 states have (on average 1.2643504531722054) internal successors, (837), 662 states have internal predecessors, (837), 50 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2022-11-03 03:31:53,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 937 transitions. [2022-11-03 03:31:53,562 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 937 transitions. Word has length 134 [2022-11-03 03:31:53,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:53,564 INFO L495 AbstractCegarLoop]: Abstraction has 714 states and 937 transitions. [2022-11-03 03:31:53,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 8.714285714285714) internal successors, (427), 50 states have internal predecessors, (427), 20 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2022-11-03 03:31:53,565 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 937 transitions. [2022-11-03 03:31:53,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 03:31:53,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:53,569 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:53,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:53,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:54,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:54,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:54,188 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:54,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:54,188 INFO L85 PathProgramCache]: Analyzing trace with hash -123107387, now seen corresponding path program 1 times [2022-11-03 03:31:54,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:31:54,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [900464313] [2022-11-03 03:31:54,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:54,189 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:31:54,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:31:54,190 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:31:54,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 03:31:54,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:54,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:31:54,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:54,730 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 102 proven. 38 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-03 03:31:54,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-11-03 03:31:54,783 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:31:54,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [900464313] [2022-11-03 03:31:54,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [900464313] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:31:54,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:31:54,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-11-03 03:31:54,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884967523] [2022-11-03 03:31:54,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:54,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:31:54,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:31:54,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:31:54,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:31:54,785 INFO L87 Difference]: Start difference. First operand 714 states and 937 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 03:31:54,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:54,960 INFO L93 Difference]: Finished difference Result 1578 states and 2036 transitions. [2022-11-03 03:31:54,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:31:54,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 134 [2022-11-03 03:31:54,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:54,964 INFO L225 Difference]: With dead ends: 1578 [2022-11-03 03:31:54,964 INFO L226 Difference]: Without dead ends: 1044 [2022-11-03 03:31:54,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:31:54,966 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 74 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:54,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 215 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:31:54,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2022-11-03 03:31:55,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 786. [2022-11-03 03:31:55,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 734 states have (on average 1.2547683923705721) internal successors, (921), 734 states have internal predecessors, (921), 50 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2022-11-03 03:31:55,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1021 transitions. [2022-11-03 03:31:55,090 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1021 transitions. Word has length 134 [2022-11-03 03:31:55,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:55,091 INFO L495 AbstractCegarLoop]: Abstraction has 786 states and 1021 transitions. [2022-11-03 03:31:55,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 03:31:55,091 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1021 transitions. [2022-11-03 03:31:55,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 03:31:55,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:55,094 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:55,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-11-03 03:31:55,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:31:55,311 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:55,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:55,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1445097415, now seen corresponding path program 1 times [2022-11-03 03:31:55,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:31:55,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237660827] [2022-11-03 03:31:55,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:55,313 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:31:55,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:31:55,315 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:31:55,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 03:31:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:55,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:31:55,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:55,880 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 94 proven. 46 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-03 03:31:55,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-11-03 03:31:55,927 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:31:55,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237660827] [2022-11-03 03:31:55,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237660827] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:31:55,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:31:55,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-11-03 03:31:55,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748912938] [2022-11-03 03:31:55,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:55,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:31:55,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:31:55,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:31:55,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:31:55,929 INFO L87 Difference]: Start difference. First operand 786 states and 1021 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 03:31:56,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:56,189 INFO L93 Difference]: Finished difference Result 2158 states and 2784 transitions. [2022-11-03 03:31:56,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:31:56,190 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 134 [2022-11-03 03:31:56,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:56,195 INFO L225 Difference]: With dead ends: 2158 [2022-11-03 03:31:56,195 INFO L226 Difference]: Without dead ends: 1552 [2022-11-03 03:31:56,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:31:56,198 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 69 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:56,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 222 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:31:56,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2022-11-03 03:31:56,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 834. [2022-11-03 03:31:56,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 782 states have (on average 1.2468030690537084) internal successors, (975), 782 states have internal predecessors, (975), 50 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2022-11-03 03:31:56,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1075 transitions. [2022-11-03 03:31:56,315 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1075 transitions. Word has length 134 [2022-11-03 03:31:56,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:56,315 INFO L495 AbstractCegarLoop]: Abstraction has 834 states and 1075 transitions. [2022-11-03 03:31:56,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 03:31:56,316 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1075 transitions. [2022-11-03 03:31:56,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 03:31:56,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:56,319 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:56,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:56,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:31:56,535 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:56,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:56,535 INFO L85 PathProgramCache]: Analyzing trace with hash -926641847, now seen corresponding path program 1 times [2022-11-03 03:31:56,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:31:56,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801649203] [2022-11-03 03:31:56,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:56,537 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:31:56,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:31:56,539 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:31:56,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 03:31:56,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:56,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:31:56,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:57,096 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 86 proven. 54 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-03 03:31:57,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:57,154 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-11-03 03:31:57,154 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:31:57,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [801649203] [2022-11-03 03:31:57,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [801649203] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:31:57,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:31:57,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-11-03 03:31:57,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187119849] [2022-11-03 03:31:57,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:31:57,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:31:57,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:31:57,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:31:57,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:31:57,156 INFO L87 Difference]: Start difference. First operand 834 states and 1075 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 03:31:57,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:57,332 INFO L93 Difference]: Finished difference Result 1560 states and 1982 transitions. [2022-11-03 03:31:57,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:31:57,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 134 [2022-11-03 03:31:57,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:57,336 INFO L225 Difference]: With dead ends: 1560 [2022-11-03 03:31:57,337 INFO L226 Difference]: Without dead ends: 1040 [2022-11-03 03:31:57,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:31:57,339 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 64 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:57,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 270 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:31:57,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2022-11-03 03:31:57,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 870. [2022-11-03 03:31:57,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 818 states have (on average 1.243276283618582) internal successors, (1017), 818 states have internal predecessors, (1017), 50 states have call successors, (50), 1 states have call predecessors, (50), 1 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2022-11-03 03:31:57,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1117 transitions. [2022-11-03 03:31:57,457 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1117 transitions. Word has length 134 [2022-11-03 03:31:57,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:57,458 INFO L495 AbstractCegarLoop]: Abstraction has 870 states and 1117 transitions. [2022-11-03 03:31:57,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 03:31:57,458 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1117 transitions. [2022-11-03 03:31:57,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 03:31:57,462 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:57,462 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:57,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:57,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:31:57,682 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:57,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:57,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1562887115, now seen corresponding path program 1 times [2022-11-03 03:31:57,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:31:57,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [586004513] [2022-11-03 03:31:57,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:57,684 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:31:57,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:31:57,686 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:31:57,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 03:31:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:58,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-03 03:31:58,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:00,091 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 12 proven. 92 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-11-03 03:32:00,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:00,513 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:00,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [586004513] [2022-11-03 03:32:00,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [586004513] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:32:00,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1190695994] [2022-11-03 03:32:00,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:00,514 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:00,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:32:00,515 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:32:00,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-03 03:32:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:01,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-03 03:32:01,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 12 proven. 92 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-11-03 03:32:02,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:02,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1190695994] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:32:02,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77320606] [2022-11-03 03:32:02,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:02,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:02,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:02,999 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:32:03,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-03 03:32:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:03,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 03:32:03,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:05,262 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 12 proven. 97 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-03 03:32:05,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:05,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77320606] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:32:05,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:32:05,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 19] total 19 [2022-11-03 03:32:05,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757031370] [2022-11-03 03:32:05,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:32:05,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 03:32:05,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:05,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 03:32:05,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2022-11-03 03:32:05,308 INFO L87 Difference]: Start difference. First operand 870 states and 1117 transitions. Second operand has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 19 states have internal predecessors, (88), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-03 03:32:09,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:09,416 INFO L93 Difference]: Finished difference Result 2552 states and 3256 transitions. [2022-11-03 03:32:09,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-03 03:32:09,418 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 19 states have internal predecessors, (88), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 134 [2022-11-03 03:32:09,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:09,424 INFO L225 Difference]: With dead ends: 2552 [2022-11-03 03:32:09,425 INFO L226 Difference]: Without dead ends: 2238 [2022-11-03 03:32:09,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=666, Invalid=2304, Unknown=0, NotChecked=0, Total=2970 [2022-11-03 03:32:09,428 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 830 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:09,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [830 Valid, 1175 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1010 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 03:32:09,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2022-11-03 03:32:09,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 1218. [2022-11-03 03:32:09,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1150 states have (on average 1.228695652173913) internal successors, (1413), 1150 states have internal predecessors, (1413), 66 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2022-11-03 03:32:09,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 1545 transitions. [2022-11-03 03:32:09,626 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 1545 transitions. Word has length 134 [2022-11-03 03:32:09,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:09,627 INFO L495 AbstractCegarLoop]: Abstraction has 1218 states and 1545 transitions. [2022-11-03 03:32:09,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 19 states have internal predecessors, (88), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-03 03:32:09,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 1545 transitions. [2022-11-03 03:32:09,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 03:32:09,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:09,630 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:09,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-11-03 03:32:09,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:10,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2022-11-03 03:32:10,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:10,246 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:10,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:10,247 INFO L85 PathProgramCache]: Analyzing trace with hash 696282187, now seen corresponding path program 1 times [2022-11-03 03:32:10,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:10,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [597252657] [2022-11-03 03:32:10,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:10,248 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:10,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:10,248 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:10,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 03:32:10,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:10,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 03:32:10,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:12,615 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 12 proven. 92 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-11-03 03:32:12,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:13,288 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:13,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [597252657] [2022-11-03 03:32:13,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [597252657] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:32:13,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [355582216] [2022-11-03 03:32:13,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:13,289 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:13,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:32:13,290 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:32:13,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-03 03:32:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:14,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 03:32:14,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:16,355 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 6 proven. 117 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-03 03:32:16,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 6 proven. 117 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-03 03:32:17,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [355582216] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:17,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765913154] [2022-11-03 03:32:17,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:17,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:17,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:17,646 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:32:17,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-03 03:32:17,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:17,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 03:32:17,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:19,662 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 12 proven. 92 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-11-03 03:32:19,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:20,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765913154] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:32:20,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-03 03:32:20,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 11, 16] total 34 [2022-11-03 03:32:20,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478458141] [2022-11-03 03:32:20,041 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-03 03:32:20,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 03:32:20,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:20,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 03:32:20,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 03:32:20,043 INFO L87 Difference]: Start difference. First operand 1218 states and 1545 transitions. Second operand has 34 states, 34 states have (on average 7.5588235294117645) internal successors, (257), 34 states have internal predecessors, (257), 11 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 11 states have call predecessors, (22), 11 states have call successors, (22) [2022-11-03 03:32:51,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:51,924 INFO L93 Difference]: Finished difference Result 5403 states and 6890 transitions. [2022-11-03 03:32:51,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-11-03 03:32:51,925 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 7.5588235294117645) internal successors, (257), 34 states have internal predecessors, (257), 11 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 11 states have call predecessors, (22), 11 states have call successors, (22) Word has length 134 [2022-11-03 03:32:51,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:51,942 INFO L225 Difference]: With dead ends: 5403 [2022-11-03 03:32:51,942 INFO L226 Difference]: Without dead ends: 5157 [2022-11-03 03:32:51,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 743 GetRequests, 516 SyntacticMatches, 1 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19575 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=5483, Invalid=46273, Unknown=0, NotChecked=0, Total=51756 [2022-11-03 03:32:51,957 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 5006 mSDsluCounter, 4829 mSDsCounter, 0 mSdLazyCounter, 4919 mSolverCounterSat, 1158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5006 SdHoareTripleChecker+Valid, 5147 SdHoareTripleChecker+Invalid, 6077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1158 IncrementalHoareTripleChecker+Valid, 4919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:51,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5006 Valid, 5147 Invalid, 6077 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1158 Valid, 4919 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-11-03 03:32:51,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5157 states. [2022-11-03 03:32:52,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5157 to 2056. [2022-11-03 03:32:52,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2056 states, 1940 states have (on average 1.2211340206185568) internal successors, (2369), 1940 states have internal predecessors, (2369), 114 states have call successors, (114), 1 states have call predecessors, (114), 1 states have return successors, (114), 114 states have call predecessors, (114), 114 states have call successors, (114) [2022-11-03 03:32:52,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 2597 transitions. [2022-11-03 03:32:52,387 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 2597 transitions. Word has length 134 [2022-11-03 03:32:52,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:52,387 INFO L495 AbstractCegarLoop]: Abstraction has 2056 states and 2597 transitions. [2022-11-03 03:32:52,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 7.5588235294117645) internal successors, (257), 34 states have internal predecessors, (257), 11 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 11 states have call predecessors, (22), 11 states have call successors, (22) [2022-11-03 03:32:52,388 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 2597 transitions. [2022-11-03 03:32:52,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-11-03 03:32:52,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:52,397 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:52,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:52,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:52,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:53,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:53,011 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:53,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:53,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1800283527, now seen corresponding path program 2 times [2022-11-03 03:32:53,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:53,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [154389547] [2022-11-03 03:32:53,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:32:53,013 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:53,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:53,014 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:53,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 03:32:53,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:32:53,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:32:53,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 1876 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 03:32:53,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 487 proven. 102 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-11-03 03:32:54,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:54,972 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:54,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [154389547] [2022-11-03 03:32:54,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [154389547] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:32:54,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [270727767] [2022-11-03 03:32:54,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:32:54,973 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:54,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:32:54,974 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:32:54,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-03 03:32:56,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:32:56,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:32:56,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 1876 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 03:32:56,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:57,728 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 487 proven. 102 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-11-03 03:32:57,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:57,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [270727767] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:32:57,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565745142] [2022-11-03 03:32:57,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:32:57,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:57,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:57,911 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:32:57,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-03 03:32:58,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:32:58,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:32:58,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 1876 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 03:32:58,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 487 proven. 102 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-11-03 03:32:59,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:59,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565745142] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:32:59,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:32:59,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2022-11-03 03:32:59,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798621532] [2022-11-03 03:32:59,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:32:59,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 03:32:59,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:59,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 03:32:59,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2022-11-03 03:32:59,372 INFO L87 Difference]: Start difference. First operand 2056 states and 2597 transitions. Second operand has 22 states, 22 states have (on average 8.454545454545455) internal successors, (186), 22 states have internal predecessors, (186), 7 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-03 03:33:01,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:01,010 INFO L93 Difference]: Finished difference Result 5294 states and 6630 transitions. [2022-11-03 03:33:01,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 03:33:01,011 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 8.454545454545455) internal successors, (186), 22 states have internal predecessors, (186), 7 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 245 [2022-11-03 03:33:01,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:01,023 INFO L225 Difference]: With dead ends: 5294 [2022-11-03 03:33:01,023 INFO L226 Difference]: Without dead ends: 4050 [2022-11-03 03:33:01,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1222 GetRequests, 1181 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=313, Invalid=1493, Unknown=0, NotChecked=0, Total=1806 [2022-11-03 03:33:01,027 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 432 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 396 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:01,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 1020 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 176 Invalid, 0 Unknown, 396 Unchecked, 0.4s Time] [2022-11-03 03:33:01,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4050 states. [2022-11-03 03:33:01,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4050 to 2836. [2022-11-03 03:33:01,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2836 states, 2676 states have (on average 1.2047832585949179) internal successors, (3224), 2676 states have internal predecessors, (3224), 158 states have call successors, (158), 1 states have call predecessors, (158), 1 states have return successors, (158), 158 states have call predecessors, (158), 158 states have call successors, (158) [2022-11-03 03:33:01,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2836 states to 2836 states and 3540 transitions. [2022-11-03 03:33:01,552 INFO L78 Accepts]: Start accepts. Automaton has 2836 states and 3540 transitions. Word has length 245 [2022-11-03 03:33:01,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:01,552 INFO L495 AbstractCegarLoop]: Abstraction has 2836 states and 3540 transitions. [2022-11-03 03:33:01,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.454545454545455) internal successors, (186), 22 states have internal predecessors, (186), 7 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-03 03:33:01,553 INFO L276 IsEmpty]: Start isEmpty. Operand 2836 states and 3540 transitions. [2022-11-03 03:33:01,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-11-03 03:33:01,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:01,565 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:01,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:01,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:02,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:02,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:33:02,191 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:02,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:02,192 INFO L85 PathProgramCache]: Analyzing trace with hash -849432563, now seen corresponding path program 3 times [2022-11-03 03:33:02,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:02,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857513375] [2022-11-03 03:33:02,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:33:02,194 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:02,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:02,195 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:02,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 03:33:02,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:33:02,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:33:02,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-03 03:33:02,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:05,618 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 145 proven. 106 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2022-11-03 03:33:05,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:06,585 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:06,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857513375] [2022-11-03 03:33:06,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857513375] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:06,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [573129230] [2022-11-03 03:33:06,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:33:06,586 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:33:06,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:33:06,587 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:33:06,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-03 03:33:07,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:33:07,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:33:07,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 03:33:07,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:11,933 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 145 proven. 106 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2022-11-03 03:33:11,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:12,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [573129230] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:12,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203314606] [2022-11-03 03:33:12,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:33:12,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:12,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:12,207 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:33:12,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-03 03:33:12,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:33:12,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:33:12,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 03:33:12,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 145 proven. 106 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2022-11-03 03:33:15,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:15,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203314606] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:15,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:33:15,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 19] total 33 [2022-11-03 03:33:15,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64796411] [2022-11-03 03:33:15,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:33:15,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-03 03:33:15,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:15,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-03 03:33:15,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1549, Unknown=0, NotChecked=0, Total=1806 [2022-11-03 03:33:15,838 INFO L87 Difference]: Start difference. First operand 2836 states and 3540 transitions. Second operand has 33 states, 31 states have (on average 5.193548387096774) internal successors, (161), 31 states have internal predecessors, (161), 8 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-03 03:33:18,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:18,085 INFO L93 Difference]: Finished difference Result 3846 states and 4841 transitions. [2022-11-03 03:33:18,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 03:33:18,086 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 5.193548387096774) internal successors, (161), 31 states have internal predecessors, (161), 8 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 245 [2022-11-03 03:33:18,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:18,096 INFO L225 Difference]: With dead ends: 3846 [2022-11-03 03:33:18,096 INFO L226 Difference]: Without dead ends: 3493 [2022-11-03 03:33:18,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 889 GetRequests, 830 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=460, Invalid=2510, Unknown=0, NotChecked=0, Total=2970 [2022-11-03 03:33:18,098 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 74 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:18,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 425 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 125 Unchecked, 0.0s Time] [2022-11-03 03:33:18,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3493 states. [2022-11-03 03:33:18,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3493 to 2861. [2022-11-03 03:33:18,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2861 states, 2703 states have (on average 1.198298187199408) internal successors, (3239), 2703 states have internal predecessors, (3239), 156 states have call successors, (156), 1 states have call predecessors, (156), 1 states have return successors, (156), 156 states have call predecessors, (156), 156 states have call successors, (156) [2022-11-03 03:33:18,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2861 states to 2861 states and 3551 transitions. [2022-11-03 03:33:18,811 INFO L78 Accepts]: Start accepts. Automaton has 2861 states and 3551 transitions. Word has length 245 [2022-11-03 03:33:18,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:18,812 INFO L495 AbstractCegarLoop]: Abstraction has 2861 states and 3551 transitions. [2022-11-03 03:33:18,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 5.193548387096774) internal successors, (161), 31 states have internal predecessors, (161), 8 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-03 03:33:18,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2861 states and 3551 transitions. [2022-11-03 03:33:18,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-11-03 03:33:18,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:18,823 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:18,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:19,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-11-03 03:33:19,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-11-03 03:33:19,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:33:19,438 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:19,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:19,439 INFO L85 PathProgramCache]: Analyzing trace with hash -816790189, now seen corresponding path program 1 times [2022-11-03 03:33:19,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:19,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1504904794] [2022-11-03 03:33:19,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:19,440 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:19,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:19,441 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:19,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 03:33:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:20,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 1876 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 03:33:20,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:21,601 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 506 proven. 135 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-11-03 03:33:21,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:23,272 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:23,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1504904794] [2022-11-03 03:33:23,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1504904794] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:23,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1918552169] [2022-11-03 03:33:23,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:23,273 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:33:23,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:33:23,275 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:33:23,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-03 03:33:24,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:24,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 1876 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 03:33:24,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:26,158 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 829 trivial. 0 not checked. [2022-11-03 03:33:26,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:27,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1918552169] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:27,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006423930] [2022-11-03 03:33:27,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:27,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:27,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:27,075 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:33:27,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-03 03:33:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:27,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 1876 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 03:33:27,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:28,643 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 12 proven. 35 refuted. 0 times theorem prover too weak. 824 trivial. 0 not checked. [2022-11-03 03:33:28,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:28,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006423930] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:28,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:33:28,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 11] total 24 [2022-11-03 03:33:28,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67050979] [2022-11-03 03:33:28,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:33:28,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 03:33:28,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:28,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 03:33:28,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 03:33:28,794 INFO L87 Difference]: Start difference. First operand 2861 states and 3551 transitions. Second operand has 24 states, 23 states have (on average 8.130434782608695) internal successors, (187), 24 states have internal predecessors, (187), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-03 03:33:39,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:39,461 INFO L93 Difference]: Finished difference Result 6228 states and 7702 transitions. [2022-11-03 03:33:39,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-11-03 03:33:39,462 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 8.130434782608695) internal successors, (187), 24 states have internal predecessors, (187), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 245 [2022-11-03 03:33:39,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:39,479 INFO L225 Difference]: With dead ends: 6228 [2022-11-03 03:33:39,480 INFO L226 Difference]: Without dead ends: 4723 [2022-11-03 03:33:39,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 994 GetRequests, 870 SyntacticMatches, 2 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4133 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=1972, Invalid=13280, Unknown=0, NotChecked=0, Total=15252 [2022-11-03 03:33:39,485 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 1034 mSDsluCounter, 2839 mSDsCounter, 0 mSdLazyCounter, 1897 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 3044 SdHoareTripleChecker+Invalid, 2506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 492 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:39,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1034 Valid, 3044 Invalid, 2506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1897 Invalid, 0 Unknown, 492 Unchecked, 2.6s Time] [2022-11-03 03:33:39,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4723 states. [2022-11-03 03:33:39,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4723 to 2768. [2022-11-03 03:33:39,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2768 states, 2616 states have (on average 1.198394495412844) internal successors, (3135), 2616 states have internal predecessors, (3135), 150 states have call successors, (150), 1 states have call predecessors, (150), 1 states have return successors, (150), 150 states have call predecessors, (150), 150 states have call successors, (150) [2022-11-03 03:33:40,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2768 states to 2768 states and 3435 transitions. [2022-11-03 03:33:40,003 INFO L78 Accepts]: Start accepts. Automaton has 2768 states and 3435 transitions. Word has length 245 [2022-11-03 03:33:40,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:40,004 INFO L495 AbstractCegarLoop]: Abstraction has 2768 states and 3435 transitions. [2022-11-03 03:33:40,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 8.130434782608695) internal successors, (187), 24 states have internal predecessors, (187), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-03 03:33:40,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2768 states and 3435 transitions. [2022-11-03 03:33:40,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-11-03 03:33:40,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:40,012 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:40,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:40,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-11-03 03:33:40,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:40,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:40,623 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:40,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:40,623 INFO L85 PathProgramCache]: Analyzing trace with hash -631957593, now seen corresponding path program 4 times [2022-11-03 03:33:40,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:33:40,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160882798] [2022-11-03 03:33:40,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:33:40,625 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:33:40,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:33:40,626 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:33:40,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 03:33:41,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:33:41,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:33:41,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 1876 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-03 03:33:41,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:42,582 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 410 proven. 203 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2022-11-03 03:33:42,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:43,519 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:33:43,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160882798] [2022-11-03 03:33:43,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1160882798] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:43,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1666490150] [2022-11-03 03:33:43,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:33:43,520 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:33:43,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:33:43,521 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:33:43,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-03 03:33:44,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:33:44,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:33:44,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 1876 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 03:33:44,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:46,299 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 36 proven. 30 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2022-11-03 03:33:46,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:47,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1666490150] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:47,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412739952] [2022-11-03 03:33:47,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:33:47,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:47,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:47,310 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:33:47,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-03 03:33:47,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:33:47,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:33:47,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 1876 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-03 03:33:47,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 410 proven. 203 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2022-11-03 03:33:50,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:52,131 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 250 proven. 203 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2022-11-03 03:33:52,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412739952] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:33:52,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-03 03:33:52,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 17, 17] total 54 [2022-11-03 03:33:52,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913638191] [2022-11-03 03:33:52,131 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-03 03:33:52,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-03 03:33:52,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:33:52,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-03 03:33:52,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=3677, Unknown=0, NotChecked=0, Total=3906 [2022-11-03 03:33:52,134 INFO L87 Difference]: Start difference. First operand 2768 states and 3435 transitions. Second operand has 54 states, 54 states have (on average 7.185185185185185) internal successors, (388), 54 states have internal predecessors, (388), 15 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (32), 15 states have call predecessors, (32), 15 states have call successors, (32) [2022-11-03 03:34:04,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:04,341 INFO L93 Difference]: Finished difference Result 5342 states and 6676 transitions. [2022-11-03 03:34:04,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-11-03 03:34:04,342 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 7.185185185185185) internal successors, (388), 54 states have internal predecessors, (388), 15 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (32), 15 states have call predecessors, (32), 15 states have call successors, (32) Word has length 245 [2022-11-03 03:34:04,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:04,352 INFO L225 Difference]: With dead ends: 5342 [2022-11-03 03:34:04,353 INFO L226 Difference]: Without dead ends: 4104 [2022-11-03 03:34:04,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1251 GetRequests, 1090 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7115 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=2741, Invalid=23665, Unknown=0, NotChecked=0, Total=26406 [2022-11-03 03:34:04,358 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 376 mSDsluCounter, 4280 mSDsCounter, 0 mSdLazyCounter, 1428 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 4476 SdHoareTripleChecker+Invalid, 2476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 996 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:04,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 4476 Invalid, 2476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1428 Invalid, 0 Unknown, 996 Unchecked, 1.9s Time] [2022-11-03 03:34:04,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4104 states. [2022-11-03 03:34:04,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4104 to 3347. [2022-11-03 03:34:04,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3347 states, 3157 states have (on average 1.1910041178333861) internal successors, (3760), 3157 states have internal predecessors, (3760), 188 states have call successors, (188), 1 states have call predecessors, (188), 1 states have return successors, (188), 188 states have call predecessors, (188), 188 states have call successors, (188) [2022-11-03 03:34:04,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3347 states to 3347 states and 4136 transitions. [2022-11-03 03:34:04,946 INFO L78 Accepts]: Start accepts. Automaton has 3347 states and 4136 transitions. Word has length 245 [2022-11-03 03:34:04,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:04,946 INFO L495 AbstractCegarLoop]: Abstraction has 3347 states and 4136 transitions. [2022-11-03 03:34:04,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 7.185185185185185) internal successors, (388), 54 states have internal predecessors, (388), 15 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (32), 15 states have call predecessors, (32), 15 states have call successors, (32) [2022-11-03 03:34:04,947 INFO L276 IsEmpty]: Start isEmpty. Operand 3347 states and 4136 transitions. [2022-11-03 03:34:04,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-11-03 03:34:04,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:04,955 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:04,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:05,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2022-11-03 03:34:05,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:05,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:05,576 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:05,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:05,577 INFO L85 PathProgramCache]: Analyzing trace with hash 320282203, now seen corresponding path program 2 times [2022-11-03 03:34:05,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:34:05,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1907104437] [2022-11-03 03:34:05,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:34:05,579 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:34:05,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:34:05,580 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:34:05,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-03 03:34:06,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:34:06,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:34:06,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 1876 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-03 03:34:06,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:08,335 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 431 proven. 238 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2022-11-03 03:34:08,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:10,000 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:34:10,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1907104437] [2022-11-03 03:34:10,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1907104437] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:34:10,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [452856771] [2022-11-03 03:34:10,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:34:10,001 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:34:10,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:34:10,003 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:34:10,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-03 03:34:10,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:34:10,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:34:10,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 1876 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:34:10,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:11,137 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 412 proven. 0 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2022-11-03 03:34:11,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:34:11,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [452856771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:11,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:34:11,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [17] total 20 [2022-11-03 03:34:11,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602968787] [2022-11-03 03:34:11,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:11,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:34:11,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:34:11,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:34:11,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2022-11-03 03:34:11,140 INFO L87 Difference]: Start difference. First operand 3347 states and 4136 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 03:34:11,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:11,633 INFO L93 Difference]: Finished difference Result 5464 states and 6720 transitions. [2022-11-03 03:34:11,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:34:11,634 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 245 [2022-11-03 03:34:11,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:11,639 INFO L225 Difference]: With dead ends: 5464 [2022-11-03 03:34:11,639 INFO L226 Difference]: Without dead ends: 2437 [2022-11-03 03:34:11,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 583 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2022-11-03 03:34:11,643 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 90 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:11,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 210 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:34:11,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2022-11-03 03:34:11,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 2383. [2022-11-03 03:34:11,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2383 states, 2249 states have (on average 1.1662961316140508) internal successors, (2623), 2249 states have internal predecessors, (2623), 132 states have call successors, (132), 1 states have call predecessors, (132), 1 states have return successors, (132), 132 states have call predecessors, (132), 132 states have call successors, (132) [2022-11-03 03:34:11,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2383 states to 2383 states and 2887 transitions. [2022-11-03 03:34:11,990 INFO L78 Accepts]: Start accepts. Automaton has 2383 states and 2887 transitions. Word has length 245 [2022-11-03 03:34:11,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:11,991 INFO L495 AbstractCegarLoop]: Abstraction has 2383 states and 2887 transitions. [2022-11-03 03:34:11,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 03:34:11,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2383 states and 2887 transitions. [2022-11-03 03:34:11,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-11-03 03:34:11,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:11,996 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:12,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2022-11-03 03:34:12,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:12,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:34:12,398 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:12,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:12,398 INFO L85 PathProgramCache]: Analyzing trace with hash 544614037, now seen corresponding path program 3 times [2022-11-03 03:34:12,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:34:12,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1415422580] [2022-11-03 03:34:12,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:34:12,400 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:34:12,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:34:12,401 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:34:12,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-03 03:34:13,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-03 03:34:13,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:34:13,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 1626 conjuncts, 105 conjunts are in the unsatisfiable core [2022-11-03 03:34:13,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 24 proven. 464 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2022-11-03 03:34:24,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:28,609 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:34:28,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1415422580] [2022-11-03 03:34:28,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1415422580] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:34:28,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2098656136] [2022-11-03 03:34:28,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:34:28,610 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:34:28,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:34:28,612 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:34:28,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-03 03:34:29,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-03 03:34:29,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:34:29,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 1626 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-03 03:34:29,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:39,400 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 24 proven. 464 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2022-11-03 03:34:39,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:40,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2098656136] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:34:40,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510895530] [2022-11-03 03:34:40,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:34:40,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:40,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:34:40,527 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:34:40,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-03 03:34:41,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-03 03:34:41,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:34:41,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 1626 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-03 03:34:41,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:51,228 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 24 proven. 464 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2022-11-03 03:34:51,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:52,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510895530] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:34:52,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:34:52,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 34, 34] total 101 [2022-11-03 03:34:52,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367861732] [2022-11-03 03:34:52,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:34:52,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-03 03:34:52,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:34:52,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-03 03:34:52,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=14407, Unknown=0, NotChecked=0, Total=15006 [2022-11-03 03:34:52,315 INFO L87 Difference]: Start difference. First operand 2383 states and 2887 transitions. Second operand has 101 states, 101 states have (on average 4.653465346534653) internal successors, (470), 101 states have internal predecessors, (470), 18 states have call successors, (36), 1 states have call predecessors, (36), 1 states have return successors, (36), 18 states have call predecessors, (36), 18 states have call successors, (36) [2022-11-03 03:35:26,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:26,904 INFO L93 Difference]: Finished difference Result 7878 states and 9626 transitions. [2022-11-03 03:35:26,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-11-03 03:35:26,906 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 4.653465346534653) internal successors, (470), 101 states have internal predecessors, (470), 18 states have call successors, (36), 1 states have call predecessors, (36), 1 states have return successors, (36), 18 states have call predecessors, (36), 18 states have call successors, (36) Word has length 245 [2022-11-03 03:35:26,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:26,916 INFO L225 Difference]: With dead ends: 7878 [2022-11-03 03:35:26,916 INFO L226 Difference]: Without dead ends: 6832 [2022-11-03 03:35:26,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 908 GetRequests, 685 SyntacticMatches, 2 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13995 ImplicationChecksByTransitivity, 42.6s TimeCoverageRelationStatistics Valid=4365, Invalid=45141, Unknown=0, NotChecked=0, Total=49506 [2022-11-03 03:35:26,921 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 2092 mSDsluCounter, 14796 mSDsCounter, 0 mSdLazyCounter, 10439 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2092 SdHoareTripleChecker+Valid, 15096 SdHoareTripleChecker+Invalid, 12084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 10439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1162 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:26,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2092 Valid, 15096 Invalid, 12084 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [483 Valid, 10439 Invalid, 0 Unknown, 1162 Unchecked, 12.4s Time] [2022-11-03 03:35:26,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6832 states. [2022-11-03 03:35:27,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6832 to 3726. [2022-11-03 03:35:27,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3726 states, 3534 states have (on average 1.1743067345783815) internal successors, (4150), 3534 states have internal predecessors, (4150), 190 states have call successors, (190), 1 states have call predecessors, (190), 1 states have return successors, (190), 190 states have call predecessors, (190), 190 states have call successors, (190) [2022-11-03 03:35:27,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3726 states to 3726 states and 4530 transitions. [2022-11-03 03:35:27,641 INFO L78 Accepts]: Start accepts. Automaton has 3726 states and 4530 transitions. Word has length 245 [2022-11-03 03:35:27,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:27,641 INFO L495 AbstractCegarLoop]: Abstraction has 3726 states and 4530 transitions. [2022-11-03 03:35:27,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 4.653465346534653) internal successors, (470), 101 states have internal predecessors, (470), 18 states have call successors, (36), 1 states have call predecessors, (36), 1 states have return successors, (36), 18 states have call predecessors, (36), 18 states have call successors, (36) [2022-11-03 03:35:27,643 INFO L276 IsEmpty]: Start isEmpty. Operand 3726 states and 4530 transitions. [2022-11-03 03:35:27,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-11-03 03:35:27,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:27,648 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:27,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:27,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2022-11-03 03:35:28,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-11-03 03:35:28,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:28,249 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:35:28,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:28,249 INFO L85 PathProgramCache]: Analyzing trace with hash -321990891, now seen corresponding path program 5 times [2022-11-03 03:35:28,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:35:28,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1665493508] [2022-11-03 03:35:28,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 03:35:28,251 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:35:28,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:35:28,252 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:35:28,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-03 03:35:29,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-03 03:35:29,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:35:29,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 1876 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-03 03:35:29,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:36,173 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 24 proven. 464 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2022-11-03 03:35:36,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:37,304 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:35:37,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1665493508] [2022-11-03 03:35:37,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1665493508] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:35:37,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [448715958] [2022-11-03 03:35:37,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 03:35:37,305 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:35:37,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:35:37,307 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:35:37,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-03 03:35:38,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-03 03:35:38,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:35:38,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 1876 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-03 03:35:38,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:43,582 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 24 proven. 474 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2022-11-03 03:35:43,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:44,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [448715958] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:35:44,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265159627] [2022-11-03 03:35:44,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 03:35:44,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:44,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:35:44,220 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:35:44,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-03 03:35:44,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-03 03:35:44,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:35:45,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 1876 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-03 03:35:45,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:54,886 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 24 proven. 464 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2022-11-03 03:35:54,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:55,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265159627] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:35:55,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:35:55,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 40, 34] total 71 [2022-11-03 03:35:55,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872908005] [2022-11-03 03:35:55,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:35:55,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-03 03:35:55,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:35:55,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-03 03:35:55,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=5190, Unknown=0, NotChecked=0, Total=5402 [2022-11-03 03:35:55,592 INFO L87 Difference]: Start difference. First operand 3726 states and 4530 transitions. Second operand has 71 states, 71 states have (on average 4.577464788732394) internal successors, (325), 71 states have internal predecessors, (325), 13 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 13 states have call predecessors, (26), 13 states have call successors, (26) [2022-11-03 03:36:43,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:36:43,091 INFO L93 Difference]: Finished difference Result 10147 states and 12461 transitions. [2022-11-03 03:36:43,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2022-11-03 03:36:43,092 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 4.577464788732394) internal successors, (325), 71 states have internal predecessors, (325), 13 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 13 states have call predecessors, (26), 13 states have call successors, (26) Word has length 245 [2022-11-03 03:36:43,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:36:43,108 INFO L225 Difference]: With dead ends: 10147 [2022-11-03 03:36:43,108 INFO L226 Difference]: Without dead ends: 9339 [2022-11-03 03:36:43,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 983 GetRequests, 688 SyntacticMatches, 2 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 8 DeprecatedPredicates, 31348 ImplicationChecksByTransitivity, 39.6s TimeCoverageRelationStatistics Valid=4962, Invalid=81768, Unknown=0, NotChecked=0, Total=86730 [2022-11-03 03:36:43,117 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 3238 mSDsluCounter, 17566 mSDsCounter, 0 mSdLazyCounter, 12916 mSolverCounterSat, 851 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3238 SdHoareTripleChecker+Valid, 18099 SdHoareTripleChecker+Invalid, 16423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 851 IncrementalHoareTripleChecker+Valid, 12916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2656 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:36:43,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3238 Valid, 18099 Invalid, 16423 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [851 Valid, 12916 Invalid, 0 Unknown, 2656 Unchecked, 17.1s Time] [2022-11-03 03:36:43,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9339 states. [2022-11-03 03:36:43,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9339 to 3732. [2022-11-03 03:36:43,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3732 states, 3540 states have (on average 1.1740112994350282) internal successors, (4156), 3540 states have internal predecessors, (4156), 190 states have call successors, (190), 1 states have call predecessors, (190), 1 states have return successors, (190), 190 states have call predecessors, (190), 190 states have call successors, (190) [2022-11-03 03:36:43,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3732 states to 3732 states and 4536 transitions. [2022-11-03 03:36:43,853 INFO L78 Accepts]: Start accepts. Automaton has 3732 states and 4536 transitions. Word has length 245 [2022-11-03 03:36:43,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:36:43,854 INFO L495 AbstractCegarLoop]: Abstraction has 3732 states and 4536 transitions. [2022-11-03 03:36:43,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 4.577464788732394) internal successors, (325), 71 states have internal predecessors, (325), 13 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 13 states have call predecessors, (26), 13 states have call successors, (26) [2022-11-03 03:36:43,854 INFO L276 IsEmpty]: Start isEmpty. Operand 3732 states and 4536 transitions. [2022-11-03 03:36:43,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-11-03 03:36:43,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:36:43,860 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:36:43,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-03 03:36:44,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2022-11-03 03:36:44,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-11-03 03:36:44,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:36:44,461 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:36:44,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:36:44,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1717962987, now seen corresponding path program 1 times [2022-11-03 03:36:44,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:36:44,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [571102303] [2022-11-03 03:36:44,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:36:44,463 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:36:44,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:36:44,464 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:36:44,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-03 03:36:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:36:45,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 1876 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-03 03:36:45,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:36:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 243 proven. 333 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-11-03 03:36:46,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:36:56,066 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:36:56,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [571102303] [2022-11-03 03:36:56,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [571102303] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:36:56,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1634468915] [2022-11-03 03:36:56,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:36:56,067 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:36:56,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:36:56,068 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:36:56,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-11-03 03:36:57,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:36:57,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 1876 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-03 03:36:57,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 24 proven. 464 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2022-11-03 03:38:38,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:38:55,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1634468915] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:38:55,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930747009] [2022-11-03 03:38:55,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:55,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:38:55,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:38:55,978 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:38:55,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8736d7b7-72f2-4c63-99b3-4dfa0eabe291/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-03 03:38:56,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:56,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 1876 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 03:38:56,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:40:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 243 proven. 333 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-11-03 03:40:07,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:40:23,428 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 147 proven. 333 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-11-03 03:40:23,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930747009] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:40:23,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-03 03:40:23,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 34, 22, 22] total 92 [2022-11-03 03:40:23,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146253351] [2022-11-03 03:40:23,430 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-03 03:40:23,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-11-03 03:40:23,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:40:23,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-11-03 03:40:23,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=8975, Unknown=1, NotChecked=0, Total=9312 [2022-11-03 03:40:23,433 INFO L87 Difference]: Start difference. First operand 3732 states and 4536 transitions. Second operand has 92 states, 92 states have (on average 6.1521739130434785) internal successors, (566), 92 states have internal predecessors, (566), 22 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (46), 22 states have call predecessors, (46), 22 states have call successors, (46)