./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.fischer.2.prop1-back-serstep.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.fischer.2.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash b1c8e0ca4434a3155268f4fdeec8cb4441ab99f0362813399669fdc1baa79ade --- 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-8393723 [2022-11-18 20:31:56,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:31:56,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:31:56,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:31:56,489 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:31:56,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:31:56,491 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:31:56,493 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:31:56,495 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:31:56,496 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:31:56,497 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:31:56,498 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:31:56,499 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:31:56,500 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:31:56,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:31:56,502 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:31:56,503 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:31:56,504 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:31:56,506 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:31:56,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:31:56,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:31:56,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:31:56,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:31:56,514 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:31:56,519 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:31:56,519 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:31:56,519 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:31:56,520 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:31:56,521 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:31:56,522 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:31:56,522 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:31:56,523 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:31:56,524 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:31:56,525 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:31:56,526 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:31:56,526 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:31:56,527 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:31:56,527 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:31:56,528 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:31:56,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:31:56,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:31:56,530 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-18 20:31:56,562 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:31:56,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:31:56,564 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:31:56,564 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:31:56,565 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:31:56,565 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:31:56,566 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:31:56,566 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:31:56,566 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:31:56,566 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:31:56,567 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:31:56,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:31:56,567 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:31:56,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:31:56,568 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:31:56,568 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:31:56,568 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:31:56,568 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:31:56,568 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:31:56,569 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:31:56,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:31:56,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:31:56,569 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:31:56,570 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:31:56,570 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:31:56,570 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:31:56,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:31:56,570 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:31:56,571 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:31:56,571 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:31:56,571 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_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1c8e0ca4434a3155268f4fdeec8cb4441ab99f0362813399669fdc1baa79ade [2022-11-18 20:31:56,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:31:56,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:31:56,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:31:56,921 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:31:56,922 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:31:56,923 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.fischer.2.prop1-back-serstep.c [2022-11-18 20:31:56,993 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/data/3038a24f5/80d5df0fa6f944b18dc873d7b2eccb8d/FLAGd11a05c7c [2022-11-18 20:31:57,679 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:31:57,680 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.fischer.2.prop1-back-serstep.c [2022-11-18 20:31:57,693 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/data/3038a24f5/80d5df0fa6f944b18dc873d7b2eccb8d/FLAGd11a05c7c [2022-11-18 20:31:58,004 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/data/3038a24f5/80d5df0fa6f944b18dc873d7b2eccb8d [2022-11-18 20:31:58,006 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:31:58,008 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:31:58,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:31:58,010 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:31:58,013 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:31:58,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:31:58" (1/1) ... [2022-11-18 20:31:58,015 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e40b4dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:58, skipping insertion in model container [2022-11-18 20:31:58,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:31:58" (1/1) ... [2022-11-18 20:31:58,023 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:31:58,075 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:31:58,331 WARN L234 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_ef95d031-3975-46c8-919d-ea5a4bc2c204/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.fischer.2.prop1-back-serstep.c[1014,1027] [2022-11-18 20:31:58,756 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:31:58,762 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:31:58,774 WARN L234 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_ef95d031-3975-46c8-919d-ea5a4bc2c204/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.fischer.2.prop1-back-serstep.c[1014,1027] [2022-11-18 20:31:58,919 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:31:58,931 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:31:58,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:58 WrapperNode [2022-11-18 20:31:58,933 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:31:58,935 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:31:58,935 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:31:58,936 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:31:58,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:58" (1/1) ... [2022-11-18 20:31:59,007 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:58" (1/1) ... [2022-11-18 20:31:59,193 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2657 [2022-11-18 20:31:59,193 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:31:59,194 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:31:59,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:31:59,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:31:59,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:58" (1/1) ... [2022-11-18 20:31:59,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:58" (1/1) ... [2022-11-18 20:31:59,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:58" (1/1) ... [2022-11-18 20:31:59,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:58" (1/1) ... [2022-11-18 20:31:59,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:58" (1/1) ... [2022-11-18 20:31:59,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:58" (1/1) ... [2022-11-18 20:31:59,335 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:58" (1/1) ... [2022-11-18 20:31:59,348 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:58" (1/1) ... [2022-11-18 20:31:59,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:31:59,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:31:59,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:31:59,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:31:59,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:58" (1/1) ... [2022-11-18 20:31:59,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:31:59,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:59,416 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:31:59,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:31:59,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:31:59,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:31:59,920 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:31:59,922 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:32:02,724 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:32:02,747 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:32:02,747 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-18 20:32:02,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:32:02 BoogieIcfgContainer [2022-11-18 20:32:02,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:32:02,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:32:02,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:32:02,758 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:32:02,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:31:58" (1/3) ... [2022-11-18 20:32:02,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f7baaca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:32:02, skipping insertion in model container [2022-11-18 20:32:02,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:58" (2/3) ... [2022-11-18 20:32:02,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f7baaca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:32:02, skipping insertion in model container [2022-11-18 20:32:02,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:32:02" (3/3) ... [2022-11-18 20:32:02,760 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.fischer.2.prop1-back-serstep.c [2022-11-18 20:32:02,779 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:32:02,779 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:32:02,880 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:32:02,892 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@74a3a854, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:32:02,892 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 20:32:02,900 INFO L276 IsEmpty]: Start isEmpty. Operand has 452 states, 450 states have (on average 1.6622222222222223) internal successors, (748), 451 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:02,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-18 20:32:02,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:32:02,911 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:32:02,912 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:32:02,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:02,917 INFO L85 PathProgramCache]: Analyzing trace with hash 923771485, now seen corresponding path program 1 times [2022-11-18 20:32:02,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:02,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198772700] [2022-11-18 20:32:02,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:02,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:03,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:03,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:32:03,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:03,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198772700] [2022-11-18 20:32:03,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198772700] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:32:03,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:32:03,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:32:03,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884342246] [2022-11-18 20:32:03,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:03,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:32:03,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:04,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:32:04,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:32:04,019 INFO L87 Difference]: Start difference. First operand has 452 states, 450 states have (on average 1.6622222222222223) internal successors, (748), 451 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:04,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:32:04,304 INFO L93 Difference]: Finished difference Result 1498 states and 2492 transitions. [2022-11-18 20:32:04,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:32:04,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-11-18 20:32:04,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:32:04,329 INFO L225 Difference]: With dead ends: 1498 [2022-11-18 20:32:04,329 INFO L226 Difference]: Without dead ends: 1048 [2022-11-18 20:32:04,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:32:04,357 INFO L413 NwaCegarLoop]: 1000 mSDtfsCounter, 2202 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2202 SdHoareTripleChecker+Valid, 2253 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:32:04,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2202 Valid, 2253 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:32:04,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2022-11-18 20:32:04,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 450. [2022-11-18 20:32:04,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.6570155902004455) internal successors, (744), 449 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:04,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 744 transitions. [2022-11-18 20:32:04,450 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 744 transitions. Word has length 109 [2022-11-18 20:32:04,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:32:04,451 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 744 transitions. [2022-11-18 20:32:04,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:04,452 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 744 transitions. [2022-11-18 20:32:04,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-18 20:32:04,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:32:04,464 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:32:04,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:32:04,465 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:32:04,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:04,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1426129465, now seen corresponding path program 1 times [2022-11-18 20:32:04,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:04,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693831698] [2022-11-18 20:32:04,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:04,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:04,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:05,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:32:05,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:05,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693831698] [2022-11-18 20:32:05,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693831698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:32:05,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:32:05,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:32:05,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313426365] [2022-11-18 20:32:05,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:05,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:32:05,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:05,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:32:05,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:32:05,172 INFO L87 Difference]: Start difference. First operand 450 states and 744 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:05,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:32:05,565 INFO L93 Difference]: Finished difference Result 1781 states and 2954 transitions. [2022-11-18 20:32:05,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:32:05,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2022-11-18 20:32:05,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:32:05,575 INFO L225 Difference]: With dead ends: 1781 [2022-11-18 20:32:05,575 INFO L226 Difference]: Without dead ends: 1333 [2022-11-18 20:32:05,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:32:05,578 INFO L413 NwaCegarLoop]: 994 mSDtfsCounter, 1843 mSDsluCounter, 1472 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1843 SdHoareTripleChecker+Valid, 2466 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:32:05,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1843 Valid, 2466 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:32:05,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-11-18 20:32:05,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 605. [2022-11-18 20:32:05,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 1.6572847682119205) internal successors, (1001), 604 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:05,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1001 transitions. [2022-11-18 20:32:05,605 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1001 transitions. Word has length 110 [2022-11-18 20:32:05,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:32:05,606 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 1001 transitions. [2022-11-18 20:32:05,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:05,607 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1001 transitions. [2022-11-18 20:32:05,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2022-11-18 20:32:05,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:32:05,614 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:32:05,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:32:05,618 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:32:05,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:05,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1754374264, now seen corresponding path program 1 times [2022-11-18 20:32:05,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:05,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942516522] [2022-11-18 20:32:05,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:05,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:05,834 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:32:05,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627122445] [2022-11-18 20:32:05,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:05,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:32:05,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:32:05,840 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:32:05,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:32:07,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:07,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 3352 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-18 20:32:07,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:32:09,543 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:32:09,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:32:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-18 20:32:10,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:10,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942516522] [2022-11-18 20:32:10,976 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:32:10,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627122445] [2022-11-18 20:32:10,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627122445] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:32:10,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:32:10,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-18 20:32:10,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541617024] [2022-11-18 20:32:10,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:10,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:32:10,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:10,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:32:10,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:32:10,979 INFO L87 Difference]: Start difference. First operand 605 states and 1001 transitions. Second operand has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:14,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:32:14,406 INFO L93 Difference]: Finished difference Result 1937 states and 3207 transitions. [2022-11-18 20:32:14,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:32:14,408 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 407 [2022-11-18 20:32:14,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:32:14,416 INFO L225 Difference]: With dead ends: 1937 [2022-11-18 20:32:14,416 INFO L226 Difference]: Without dead ends: 1935 [2022-11-18 20:32:14,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 806 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:32:14,418 INFO L413 NwaCegarLoop]: 498 mSDtfsCounter, 7317 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7317 SdHoareTripleChecker+Valid, 1373 SdHoareTripleChecker+Invalid, 1894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:32:14,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7317 Valid, 1373 Invalid, 1894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1887 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-18 20:32:14,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2022-11-18 20:32:14,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 608. [2022-11-18 20:32:14,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 1.657331136738056) internal successors, (1006), 607 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:14,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1006 transitions. [2022-11-18 20:32:14,452 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1006 transitions. Word has length 407 [2022-11-18 20:32:14,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:32:14,455 INFO L495 AbstractCegarLoop]: Abstraction has 608 states and 1006 transitions. [2022-11-18 20:32:14,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:14,456 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1006 transitions. [2022-11-18 20:32:14,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2022-11-18 20:32:14,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:32:14,467 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:32:14,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:32:14,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:32:14,682 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:32:14,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:14,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1754433846, now seen corresponding path program 1 times [2022-11-18 20:32:14,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:14,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666441342] [2022-11-18 20:32:14,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:14,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:14,877 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:32:14,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [228913685] [2022-11-18 20:32:14,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:14,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:32:14,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:32:14,879 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:32:14,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:32:16,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:16,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 3352 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-18 20:32:16,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:32:18,318 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:32:18,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:32:19,051 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-18 20:32:19,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:19,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666441342] [2022-11-18 20:32:19,052 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:32:19,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228913685] [2022-11-18 20:32:19,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228913685] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:32:19,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:32:19,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 8 [2022-11-18 20:32:19,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824831355] [2022-11-18 20:32:19,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:19,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:32:19,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:19,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:32:19,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:32:19,063 INFO L87 Difference]: Start difference. First operand 608 states and 1006 transitions. Second operand has 4 states, 4 states have (on average 76.5) internal successors, (306), 4 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:19,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:32:19,212 INFO L93 Difference]: Finished difference Result 1940 states and 3215 transitions. [2022-11-18 20:32:19,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:32:19,213 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 76.5) internal successors, (306), 4 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 407 [2022-11-18 20:32:19,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:32:19,219 INFO L225 Difference]: With dead ends: 1940 [2022-11-18 20:32:19,219 INFO L226 Difference]: Without dead ends: 1489 [2022-11-18 20:32:19,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 814 GetRequests, 807 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:32:19,221 INFO L413 NwaCegarLoop]: 994 mSDtfsCounter, 2192 mSDsluCounter, 1719 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2192 SdHoareTripleChecker+Valid, 2713 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:32:19,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2192 Valid, 2713 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:32:19,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2022-11-18 20:32:19,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 605. [2022-11-18 20:32:19,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 1.6572847682119205) internal successors, (1001), 604 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:19,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1001 transitions. [2022-11-18 20:32:19,242 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1001 transitions. Word has length 407 [2022-11-18 20:32:19,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:32:19,242 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 1001 transitions. [2022-11-18 20:32:19,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.5) internal successors, (306), 4 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:19,243 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1001 transitions. [2022-11-18 20:32:19,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2022-11-18 20:32:19,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:32:19,251 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:32:19,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:32:19,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:32:19,471 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:32:19,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:19,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1659404506, now seen corresponding path program 1 times [2022-11-18 20:32:19,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:19,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594459003] [2022-11-18 20:32:19,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:19,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:19,610 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:32:19,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116567390] [2022-11-18 20:32:19,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:19,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:32:19,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:32:19,612 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:32:19,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:32:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:20,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 3355 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-18 20:32:20,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:32:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:32:22,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:32:23,819 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-18 20:32:23,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:23,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594459003] [2022-11-18 20:32:23,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:32:23,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116567390] [2022-11-18 20:32:23,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116567390] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:32:23,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:32:23,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-11-18 20:32:23,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834236222] [2022-11-18 20:32:23,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:23,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:32:23,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:23,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:32:23,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:32:23,823 INFO L87 Difference]: Start difference. First operand 605 states and 1001 transitions. Second operand has 8 states, 8 states have (on average 38.625) internal successors, (309), 8 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:28,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:32:28,885 INFO L93 Difference]: Finished difference Result 2397 states and 3963 transitions. [2022-11-18 20:32:28,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 20:32:28,886 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 38.625) internal successors, (309), 8 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 408 [2022-11-18 20:32:28,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:32:28,894 INFO L225 Difference]: With dead ends: 2397 [2022-11-18 20:32:28,894 INFO L226 Difference]: Without dead ends: 2395 [2022-11-18 20:32:28,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 839 GetRequests, 808 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 20:32:28,896 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 11725 mSDsluCounter, 1480 mSDsCounter, 0 mSdLazyCounter, 3290 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11725 SdHoareTripleChecker+Valid, 1968 SdHoareTripleChecker+Invalid, 3301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:32:28,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11725 Valid, 1968 Invalid, 3301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3290 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-18 20:32:28,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2022-11-18 20:32:28,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 611. [2022-11-18 20:32:28,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 610 states have (on average 1.657377049180328) internal successors, (1011), 610 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:28,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 1011 transitions. [2022-11-18 20:32:28,921 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 1011 transitions. Word has length 408 [2022-11-18 20:32:28,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:32:28,921 INFO L495 AbstractCegarLoop]: Abstraction has 611 states and 1011 transitions. [2022-11-18 20:32:28,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 38.625) internal successors, (309), 8 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:28,922 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1011 transitions. [2022-11-18 20:32:28,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2022-11-18 20:32:28,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:32:28,930 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:32:28,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-18 20:32:29,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:32:29,149 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:32:29,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:29,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1659344924, now seen corresponding path program 1 times [2022-11-18 20:32:29,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:29,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726706061] [2022-11-18 20:32:29,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:29,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:29,288 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:32:29,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653660656] [2022-11-18 20:32:29,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:29,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:32:29,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:32:29,291 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:32:29,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:32:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:30,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 3355 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-18 20:32:30,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:32:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:32:32,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:32:33,317 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-18 20:32:33,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:33,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726706061] [2022-11-18 20:32:33,319 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:32:33,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653660656] [2022-11-18 20:32:33,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653660656] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:32:33,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:32:33,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2022-11-18 20:32:33,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847625194] [2022-11-18 20:32:33,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:33,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:32:33,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:33,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:32:33,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:32:33,323 INFO L87 Difference]: Start difference. First operand 611 states and 1011 transitions. Second operand has 5 states, 5 states have (on average 61.8) internal successors, (309), 5 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:33,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:32:33,577 INFO L93 Difference]: Finished difference Result 1957 states and 3240 transitions. [2022-11-18 20:32:33,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:32:33,578 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 61.8) internal successors, (309), 5 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 408 [2022-11-18 20:32:33,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:32:33,586 INFO L225 Difference]: With dead ends: 1957 [2022-11-18 20:32:33,587 INFO L226 Difference]: Without dead ends: 1501 [2022-11-18 20:32:33,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 809 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:32:33,591 INFO L413 NwaCegarLoop]: 992 mSDtfsCounter, 2930 mSDsluCounter, 2710 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2930 SdHoareTripleChecker+Valid, 3702 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:32:33,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2930 Valid, 3702 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:32:33,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2022-11-18 20:32:33,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 605. [2022-11-18 20:32:33,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 1.6572847682119205) internal successors, (1001), 604 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:33,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1001 transitions. [2022-11-18 20:32:33,615 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1001 transitions. Word has length 408 [2022-11-18 20:32:33,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:32:33,616 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 1001 transitions. [2022-11-18 20:32:33,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 61.8) internal successors, (309), 5 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:33,616 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1001 transitions. [2022-11-18 20:32:33,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2022-11-18 20:32:33,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:32:33,624 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:32:33,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:32:33,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:32:33,844 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:32:33,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:33,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1304948252, now seen corresponding path program 1 times [2022-11-18 20:32:33,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:33,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279404406] [2022-11-18 20:32:33,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:33,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:33,964 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:32:33,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1824401360] [2022-11-18 20:32:33,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:33,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:32:33,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:32:33,966 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:32:33,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:32:35,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:35,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 3358 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-18 20:32:35,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:32:36,995 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:32:36,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:32:37,951 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-18 20:32:37,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:37,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279404406] [2022-11-18 20:32:37,951 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:32:37,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824401360] [2022-11-18 20:32:37,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824401360] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:32:37,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:32:37,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 18 [2022-11-18 20:32:37,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104299679] [2022-11-18 20:32:37,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:37,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:32:37,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:37,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:32:37,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:32:37,955 INFO L87 Difference]: Start difference. First operand 605 states and 1001 transitions. Second operand has 9 states, 9 states have (on average 34.666666666666664) internal successors, (312), 9 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:43,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:32:43,655 INFO L93 Difference]: Finished difference Result 2436 states and 4022 transitions. [2022-11-18 20:32:43,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-18 20:32:43,656 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 34.666666666666664) internal successors, (312), 9 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 409 [2022-11-18 20:32:43,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:32:43,665 INFO L225 Difference]: With dead ends: 2436 [2022-11-18 20:32:43,665 INFO L226 Difference]: Without dead ends: 2434 [2022-11-18 20:32:43,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 853 GetRequests, 814 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=299, Invalid=1341, Unknown=0, NotChecked=0, Total=1640 [2022-11-18 20:32:43,668 INFO L413 NwaCegarLoop]: 482 mSDtfsCounter, 12512 mSDsluCounter, 2184 mSDsCounter, 0 mSdLazyCounter, 4321 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12512 SdHoareTripleChecker+Valid, 2666 SdHoareTripleChecker+Invalid, 4329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 4321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:32:43,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12512 Valid, 2666 Invalid, 4329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 4321 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-18 20:32:43,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2022-11-18 20:32:43,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 614. [2022-11-18 20:32:43,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 1.6574225122349102) internal successors, (1016), 613 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:43,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1016 transitions. [2022-11-18 20:32:43,693 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1016 transitions. Word has length 409 [2022-11-18 20:32:43,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:32:43,694 INFO L495 AbstractCegarLoop]: Abstraction has 614 states and 1016 transitions. [2022-11-18 20:32:43,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.666666666666664) internal successors, (312), 9 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:43,695 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1016 transitions. [2022-11-18 20:32:43,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2022-11-18 20:32:43,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:32:43,698 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:32:43,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:32:43,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:32:43,923 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:32:43,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:43,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1305007834, now seen corresponding path program 1 times [2022-11-18 20:32:43,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:43,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582625916] [2022-11-18 20:32:43,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:43,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:44,068 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:32:44,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1686520098] [2022-11-18 20:32:44,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:44,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:32:44,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:32:44,087 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:32:44,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:32:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:45,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 3358 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-18 20:32:45,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:32:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:32:47,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:32:48,539 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-18 20:32:48,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:48,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582625916] [2022-11-18 20:32:48,540 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:32:48,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686520098] [2022-11-18 20:32:48,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686520098] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:32:48,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:32:48,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 14 [2022-11-18 20:32:48,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628258453] [2022-11-18 20:32:48,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:48,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:32:48,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:48,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:32:48,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:32:48,543 INFO L87 Difference]: Start difference. First operand 614 states and 1016 transitions. Second operand has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:48,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:32:48,828 INFO L93 Difference]: Finished difference Result 1983 states and 3282 transitions. [2022-11-18 20:32:48,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:32:48,829 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 409 [2022-11-18 20:32:48,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:32:48,834 INFO L225 Difference]: With dead ends: 1983 [2022-11-18 20:32:48,834 INFO L226 Difference]: Without dead ends: 1521 [2022-11-18 20:32:48,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 829 GetRequests, 810 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:32:48,836 INFO L413 NwaCegarLoop]: 990 mSDtfsCounter, 3677 mSDsluCounter, 3699 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3677 SdHoareTripleChecker+Valid, 4689 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:32:48,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3677 Valid, 4689 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:32:48,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2022-11-18 20:32:48,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 605. [2022-11-18 20:32:48,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 1.6572847682119205) internal successors, (1001), 604 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:48,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1001 transitions. [2022-11-18 20:32:48,855 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1001 transitions. Word has length 409 [2022-11-18 20:32:48,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:32:48,856 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 1001 transitions. [2022-11-18 20:32:48,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:32:48,856 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1001 transitions. [2022-11-18 20:32:48,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2022-11-18 20:32:48,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:32:48,859 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:32:48,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:32:49,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:32:49,078 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:32:49,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:32:49,078 INFO L85 PathProgramCache]: Analyzing trace with hash -2078557954, now seen corresponding path program 1 times [2022-11-18 20:32:49,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:32:49,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044199052] [2022-11-18 20:32:49,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:49,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:32:49,179 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:32:49,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317095079] [2022-11-18 20:32:49,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:32:49,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:32:49,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:32:49,181 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:32:49,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:32:50,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:32:50,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 3361 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-18 20:32:50,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:32:52,319 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:32:52,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:32:53,399 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-18 20:32:53,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:32:53,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044199052] [2022-11-18 20:32:53,400 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:32:53,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317095079] [2022-11-18 20:32:53,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317095079] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:32:53,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:32:53,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 20 [2022-11-18 20:32:53,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017459465] [2022-11-18 20:32:53,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:32:53,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:32:53,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:32:53,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:32:53,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:32:53,402 INFO L87 Difference]: Start difference. First operand 605 states and 1001 transitions. Second operand has 10 states, 10 states have (on average 31.5) internal successors, (315), 10 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:33:00,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:33:00,161 INFO L93 Difference]: Finished difference Result 2478 states and 4092 transitions. [2022-11-18 20:33:00,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-18 20:33:00,162 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 31.5) internal successors, (315), 10 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 410 [2022-11-18 20:33:00,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:33:00,170 INFO L225 Difference]: With dead ends: 2478 [2022-11-18 20:33:00,170 INFO L226 Difference]: Without dead ends: 2476 [2022-11-18 20:33:00,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 874 GetRequests, 823 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=487, Invalid=2269, Unknown=0, NotChecked=0, Total=2756 [2022-11-18 20:33:00,173 INFO L413 NwaCegarLoop]: 476 mSDtfsCounter, 15468 mSDsluCounter, 2471 mSDsCounter, 0 mSdLazyCounter, 5050 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15468 SdHoareTripleChecker+Valid, 2947 SdHoareTripleChecker+Invalid, 5058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 5050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:33:00,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15468 Valid, 2947 Invalid, 5058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 5050 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-18 20:33:00,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2022-11-18 20:33:00,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 617. [2022-11-18 20:33:00,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 1.6574675324675325) internal successors, (1021), 616 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:33:00,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1021 transitions. [2022-11-18 20:33:00,196 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1021 transitions. Word has length 410 [2022-11-18 20:33:00,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:33:00,197 INFO L495 AbstractCegarLoop]: Abstraction has 617 states and 1021 transitions. [2022-11-18 20:33:00,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 31.5) internal successors, (315), 10 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:33:00,197 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1021 transitions. [2022-11-18 20:33:00,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2022-11-18 20:33:00,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:33:00,200 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:33:00,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:33:00,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:33:00,418 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:33:00,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:33:00,419 INFO L85 PathProgramCache]: Analyzing trace with hash -2078498372, now seen corresponding path program 1 times [2022-11-18 20:33:00,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:33:00,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165322806] [2022-11-18 20:33:00,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:00,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:33:00,524 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:33:00,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1842428190] [2022-11-18 20:33:00,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:00,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:33:00,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:33:00,526 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:33:00,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:33:01,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:01,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 3361 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-18 20:33:01,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:33:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:33:03,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:33:04,269 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-18 20:33:04,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:33:04,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165322806] [2022-11-18 20:33:04,270 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:33:04,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842428190] [2022-11-18 20:33:04,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842428190] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:33:04,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:33:04,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 14 [2022-11-18 20:33:04,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018075537] [2022-11-18 20:33:04,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:33:04,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:33:04,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:33:04,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:33:04,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:33:04,280 INFO L87 Difference]: Start difference. First operand 617 states and 1021 transitions. Second operand has 7 states, 7 states have (on average 45.0) internal successors, (315), 7 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:33:04,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:33:04,723 INFO L93 Difference]: Finished difference Result 2013 states and 3332 transitions. [2022-11-18 20:33:04,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:33:04,724 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 45.0) internal successors, (315), 7 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 410 [2022-11-18 20:33:04,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:33:04,728 INFO L225 Difference]: With dead ends: 2013 [2022-11-18 20:33:04,728 INFO L226 Difference]: Without dead ends: 1545 [2022-11-18 20:33:04,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 837 GetRequests, 815 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:33:04,730 INFO L413 NwaCegarLoop]: 988 mSDtfsCounter, 4429 mSDsluCounter, 4686 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4429 SdHoareTripleChecker+Valid, 5674 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:33:04,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4429 Valid, 5674 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:33:04,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2022-11-18 20:33:04,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 605. [2022-11-18 20:33:04,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 1.6572847682119205) internal successors, (1001), 604 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:33:04,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1001 transitions. [2022-11-18 20:33:04,751 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1001 transitions. Word has length 410 [2022-11-18 20:33:04,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:33:04,752 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 1001 transitions. [2022-11-18 20:33:04,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 45.0) internal successors, (315), 7 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:33:04,752 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1001 transitions. [2022-11-18 20:33:04,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-11-18 20:33:04,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:33:04,755 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:33:04,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:33:04,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:33:04,973 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:33:04,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:33:04,973 INFO L85 PathProgramCache]: Analyzing trace with hash 145722242, now seen corresponding path program 1 times [2022-11-18 20:33:04,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:33:04,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683558351] [2022-11-18 20:33:04,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:04,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:33:05,072 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:33:05,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [440298619] [2022-11-18 20:33:05,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:05,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:33:05,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:33:05,074 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:33:05,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:33:06,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:06,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 3364 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-18 20:33:06,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:33:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:33:08,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:33:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-18 20:33:09,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:33:09,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683558351] [2022-11-18 20:33:09,637 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:33:09,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440298619] [2022-11-18 20:33:09,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440298619] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:33:09,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:33:09,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 22 [2022-11-18 20:33:09,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729062042] [2022-11-18 20:33:09,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:33:09,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:33:09,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:33:09,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:33:09,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:33:09,640 INFO L87 Difference]: Start difference. First operand 605 states and 1001 transitions. Second operand has 11 states, 11 states have (on average 28.90909090909091) internal successors, (318), 11 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:33:17,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:33:17,198 INFO L93 Difference]: Finished difference Result 2529 states and 4177 transitions. [2022-11-18 20:33:17,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-18 20:33:17,199 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 28.90909090909091) internal successors, (318), 11 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 411 [2022-11-18 20:33:17,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:33:17,206 INFO L225 Difference]: With dead ends: 2529 [2022-11-18 20:33:17,206 INFO L226 Difference]: Without dead ends: 2527 [2022-11-18 20:33:17,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 892 GetRequests, 831 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=672, Invalid=3234, Unknown=0, NotChecked=0, Total=3906 [2022-11-18 20:33:17,208 INFO L413 NwaCegarLoop]: 470 mSDtfsCounter, 17727 mSDsluCounter, 2756 mSDsCounter, 0 mSdLazyCounter, 5776 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17727 SdHoareTripleChecker+Valid, 3226 SdHoareTripleChecker+Invalid, 5784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 5776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:33:17,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17727 Valid, 3226 Invalid, 5784 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [8 Valid, 5776 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-18 20:33:17,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2527 states. [2022-11-18 20:33:17,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2527 to 620. [2022-11-18 20:33:17,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 1.6575121163166397) internal successors, (1026), 619 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:33:17,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1026 transitions. [2022-11-18 20:33:17,229 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1026 transitions. Word has length 411 [2022-11-18 20:33:17,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:33:17,230 INFO L495 AbstractCegarLoop]: Abstraction has 620 states and 1026 transitions. [2022-11-18 20:33:17,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 28.90909090909091) internal successors, (318), 11 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:33:17,230 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1026 transitions. [2022-11-18 20:33:17,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-11-18 20:33:17,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:33:17,233 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:33:17,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-18 20:33:17,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 20:33:17,456 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:33:17,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:33:17,457 INFO L85 PathProgramCache]: Analyzing trace with hash 145781824, now seen corresponding path program 1 times [2022-11-18 20:33:17,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:33:17,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530643087] [2022-11-18 20:33:17,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:17,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:33:17,569 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:33:17,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [890108415] [2022-11-18 20:33:17,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:17,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:33:17,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:33:17,571 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:33:17,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:33:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:18,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 3364 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-18 20:33:18,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:33:20,647 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:33:20,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:33:21,698 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-18 20:33:21,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:33:21,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530643087] [2022-11-18 20:33:21,698 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:33:21,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890108415] [2022-11-18 20:33:21,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890108415] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:33:21,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:33:21,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 16 [2022-11-18 20:33:21,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662410332] [2022-11-18 20:33:21,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:33:21,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:33:21,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:33:21,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:33:21,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:33:21,701 INFO L87 Difference]: Start difference. First operand 620 states and 1026 transitions. Second operand has 8 states, 8 states have (on average 39.75) internal successors, (318), 8 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:33:22,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:33:22,152 INFO L93 Difference]: Finished difference Result 2043 states and 3382 transitions. [2022-11-18 20:33:22,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:33:22,153 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 39.75) internal successors, (318), 8 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 411 [2022-11-18 20:33:22,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:33:22,156 INFO L225 Difference]: With dead ends: 2043 [2022-11-18 20:33:22,156 INFO L226 Difference]: Without dead ends: 1569 [2022-11-18 20:33:22,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 818 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2022-11-18 20:33:22,158 INFO L413 NwaCegarLoop]: 986 mSDtfsCounter, 5186 mSDsluCounter, 5671 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5186 SdHoareTripleChecker+Valid, 6657 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:33:22,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5186 Valid, 6657 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:33:22,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2022-11-18 20:33:22,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 605. [2022-11-18 20:33:22,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 1.6572847682119205) internal successors, (1001), 604 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:33:22,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1001 transitions. [2022-11-18 20:33:22,175 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1001 transitions. Word has length 411 [2022-11-18 20:33:22,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:33:22,176 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 1001 transitions. [2022-11-18 20:33:22,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 39.75) internal successors, (318), 8 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:33:22,176 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1001 transitions. [2022-11-18 20:33:22,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2022-11-18 20:33:22,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:33:22,179 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:33:22,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-18 20:33:22,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 20:33:22,403 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:33:22,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:33:22,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1157983896, now seen corresponding path program 1 times [2022-11-18 20:33:22,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:33:22,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999895990] [2022-11-18 20:33:22,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:22,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:33:22,510 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:33:22,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645632272] [2022-11-18 20:33:22,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:22,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:33:22,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:33:22,512 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:33:22,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:33:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:23,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 3367 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-18 20:33:23,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:33:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:33:25,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:33:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-18 20:33:27,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:33:27,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999895990] [2022-11-18 20:33:27,048 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:33:27,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645632272] [2022-11-18 20:33:27,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645632272] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:33:27,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:33:27,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [14] total 24 [2022-11-18 20:33:27,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282716481] [2022-11-18 20:33:27,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:33:27,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:33:27,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:33:27,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:33:27,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:33:27,050 INFO L87 Difference]: Start difference. First operand 605 states and 1001 transitions. Second operand has 12 states, 12 states have (on average 26.75) internal successors, (321), 12 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:33:35,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:33:35,930 INFO L93 Difference]: Finished difference Result 2580 states and 4262 transitions. [2022-11-18 20:33:35,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-18 20:33:35,931 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 26.75) internal successors, (321), 12 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 412 [2022-11-18 20:33:35,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:33:35,940 INFO L225 Difference]: With dead ends: 2580 [2022-11-18 20:33:35,940 INFO L226 Difference]: Without dead ends: 2578 [2022-11-18 20:33:35,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 910 GetRequests, 839 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=886, Invalid=4370, Unknown=0, NotChecked=0, Total=5256 [2022-11-18 20:33:35,942 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 18551 mSDsluCounter, 3108 mSDsCounter, 0 mSdLazyCounter, 6680 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18551 SdHoareTripleChecker+Valid, 3572 SdHoareTripleChecker+Invalid, 6688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 6680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:33:35,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18551 Valid, 3572 Invalid, 6688 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [8 Valid, 6680 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-11-18 20:33:35,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2022-11-18 20:33:35,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 623. [2022-11-18 20:33:35,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 622 states have (on average 1.657556270096463) internal successors, (1031), 622 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:33:35,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 1031 transitions. [2022-11-18 20:33:35,961 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 1031 transitions. Word has length 412 [2022-11-18 20:33:35,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:33:35,962 INFO L495 AbstractCegarLoop]: Abstraction has 623 states and 1031 transitions. [2022-11-18 20:33:35,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 26.75) internal successors, (321), 12 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:33:35,963 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 1031 transitions. [2022-11-18 20:33:35,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2022-11-18 20:33:35,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:33:35,966 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:33:35,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:33:36,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 20:33:36,183 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:33:36,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:33:36,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1158043478, now seen corresponding path program 1 times [2022-11-18 20:33:36,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:33:36,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25601178] [2022-11-18 20:33:36,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:36,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:33:36,290 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:33:36,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1679916405] [2022-11-18 20:33:36,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:36,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:33:36,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:33:36,292 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:33:36,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:33:37,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:37,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 3367 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-18 20:33:37,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:33:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:33:39,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:33:40,811 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-18 20:33:40,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:33:40,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25601178] [2022-11-18 20:33:40,811 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:33:40,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679916405] [2022-11-18 20:33:40,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679916405] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:33:40,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:33:40,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 18 [2022-11-18 20:33:40,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913457188] [2022-11-18 20:33:40,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:33:40,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:33:40,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:33:40,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:33:40,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:33:40,814 INFO L87 Difference]: Start difference. First operand 623 states and 1031 transitions. Second operand has 9 states, 9 states have (on average 35.666666666666664) internal successors, (321), 9 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:33:41,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:33:41,403 INFO L93 Difference]: Finished difference Result 2073 states and 3432 transitions. [2022-11-18 20:33:41,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 20:33:41,403 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 35.666666666666664) internal successors, (321), 9 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 412 [2022-11-18 20:33:41,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:33:41,407 INFO L225 Difference]: With dead ends: 2073 [2022-11-18 20:33:41,407 INFO L226 Difference]: Without dead ends: 1593 [2022-11-18 20:33:41,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 853 GetRequests, 821 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 20:33:41,410 INFO L413 NwaCegarLoop]: 984 mSDtfsCounter, 5948 mSDsluCounter, 6654 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5948 SdHoareTripleChecker+Valid, 7638 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:33:41,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5948 Valid, 7638 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:33:41,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2022-11-18 20:33:41,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 605. [2022-11-18 20:33:41,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 1.6572847682119205) internal successors, (1001), 604 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:33:41,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1001 transitions. [2022-11-18 20:33:41,428 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1001 transitions. Word has length 412 [2022-11-18 20:33:41,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:33:41,429 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 1001 transitions. [2022-11-18 20:33:41,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 35.666666666666664) internal successors, (321), 9 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:33:41,429 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1001 transitions. [2022-11-18 20:33:41,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2022-11-18 20:33:41,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:33:41,432 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:33:41,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:33:41,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 20:33:41,654 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:33:41,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:33:41,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1436397606, now seen corresponding path program 1 times [2022-11-18 20:33:41,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:33:41,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404243217] [2022-11-18 20:33:41,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:41,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:33:41,792 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:33:41,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [710277144] [2022-11-18 20:33:41,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:41,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:33:41,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:33:41,795 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:33:41,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:33:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:43,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 3370 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-18 20:33:43,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:33:45,086 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:33:45,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:33:46,487 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-18 20:33:46,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:33:46,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404243217] [2022-11-18 20:33:46,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:33:46,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710277144] [2022-11-18 20:33:46,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710277144] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:33:46,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:33:46,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [15] total 26 [2022-11-18 20:33:46,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750399732] [2022-11-18 20:33:46,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:33:46,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:33:46,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:33:46,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:33:46,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:33:46,491 INFO L87 Difference]: Start difference. First operand 605 states and 1001 transitions. Second operand has 13 states, 13 states have (on average 24.923076923076923) internal successors, (324), 13 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:33:56,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:33:56,459 INFO L93 Difference]: Finished difference Result 2636 states and 4354 transitions. [2022-11-18 20:33:56,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-18 20:33:56,459 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 24.923076923076923) internal successors, (324), 13 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 413 [2022-11-18 20:33:56,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:33:56,464 INFO L225 Difference]: With dead ends: 2636 [2022-11-18 20:33:56,464 INFO L226 Difference]: Without dead ends: 2634 [2022-11-18 20:33:56,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 924 GetRequests, 845 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2135 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1081, Invalid=5399, Unknown=0, NotChecked=0, Total=6480 [2022-11-18 20:33:56,467 INFO L413 NwaCegarLoop]: 458 mSDtfsCounter, 21556 mSDsluCounter, 3312 mSDsCounter, 0 mSdLazyCounter, 7237 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21556 SdHoareTripleChecker+Valid, 3770 SdHoareTripleChecker+Invalid, 7245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 7237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:33:56,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21556 Valid, 3770 Invalid, 7245 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [8 Valid, 7237 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-11-18 20:33:56,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2022-11-18 20:33:56,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 626. [2022-11-18 20:33:56,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 1.6576) internal successors, (1036), 625 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:33:56,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1036 transitions. [2022-11-18 20:33:56,491 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1036 transitions. Word has length 413 [2022-11-18 20:33:56,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:33:56,492 INFO L495 AbstractCegarLoop]: Abstraction has 626 states and 1036 transitions. [2022-11-18 20:33:56,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 24.923076923076923) internal successors, (324), 13 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:33:56,492 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1036 transitions. [2022-11-18 20:33:56,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2022-11-18 20:33:56,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:33:56,495 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:33:56,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:33:56,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 20:33:56,714 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:33:56,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:33:56,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1436457188, now seen corresponding path program 1 times [2022-11-18 20:33:56,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:33:56,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524536448] [2022-11-18 20:33:56,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:56,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:33:56,812 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:33:56,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [643351961] [2022-11-18 20:33:56,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:33:56,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:33:56,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:33:56,813 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:33:56,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:33:58,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:33:58,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 3370 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-18 20:33:58,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:00,006 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:00,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:01,142 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-18 20:34:01,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:01,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524536448] [2022-11-18 20:34:01,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:34:01,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643351961] [2022-11-18 20:34:01,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643351961] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:01,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:34:01,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 20 [2022-11-18 20:34:01,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20646426] [2022-11-18 20:34:01,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:34:01,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:34:01,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:01,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:34:01,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:34:01,145 INFO L87 Difference]: Start difference. First operand 626 states and 1036 transitions. Second operand has 10 states, 10 states have (on average 32.4) internal successors, (324), 10 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:01,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:01,865 INFO L93 Difference]: Finished difference Result 2103 states and 3482 transitions. [2022-11-18 20:34:01,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 20:34:01,866 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 32.4) internal successors, (324), 10 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 413 [2022-11-18 20:34:01,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:01,869 INFO L225 Difference]: With dead ends: 2103 [2022-11-18 20:34:01,869 INFO L226 Difference]: Without dead ends: 1617 [2022-11-18 20:34:01,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 861 GetRequests, 824 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=1232, Unknown=0, NotChecked=0, Total=1482 [2022-11-18 20:34:01,871 INFO L413 NwaCegarLoop]: 982 mSDtfsCounter, 6715 mSDsluCounter, 7635 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6715 SdHoareTripleChecker+Valid, 8617 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:01,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6715 Valid, 8617 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:34:01,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2022-11-18 20:34:01,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 605. [2022-11-18 20:34:01,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 1.6572847682119205) internal successors, (1001), 604 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:01,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1001 transitions. [2022-11-18 20:34:01,887 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1001 transitions. Word has length 413 [2022-11-18 20:34:01,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:01,888 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 1001 transitions. [2022-11-18 20:34:01,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 32.4) internal successors, (324), 10 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:01,888 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1001 transitions. [2022-11-18 20:34:01,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2022-11-18 20:34:01,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:01,891 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:01,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:02,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:02,107 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:34:02,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:02,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1469847408, now seen corresponding path program 1 times [2022-11-18 20:34:02,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:02,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295094079] [2022-11-18 20:34:02,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:02,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:02,205 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:34:02,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [613584787] [2022-11-18 20:34:02,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:02,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:02,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:02,207 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:02,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:34:03,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:03,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 3373 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-18 20:34:03,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:05,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-18 20:34:07,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:07,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295094079] [2022-11-18 20:34:07,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:34:07,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613584787] [2022-11-18 20:34:07,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613584787] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:07,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:34:07,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [16] total 28 [2022-11-18 20:34:07,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285652891] [2022-11-18 20:34:07,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:34:07,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:34:07,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:07,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:34:07,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-11-18 20:34:07,145 INFO L87 Difference]: Start difference. First operand 605 states and 1001 transitions. Second operand has 14 states, 14 states have (on average 23.357142857142858) internal successors, (327), 14 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:18,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:18,991 INFO L93 Difference]: Finished difference Result 2682 states and 4432 transitions. [2022-11-18 20:34:18,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-18 20:34:18,992 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 23.357142857142858) internal successors, (327), 14 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 414 [2022-11-18 20:34:18,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:18,996 INFO L225 Difference]: With dead ends: 2682 [2022-11-18 20:34:18,996 INFO L226 Difference]: Without dead ends: 2680 [2022-11-18 20:34:18,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 946 GetRequests, 855 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2855 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1401, Invalid=7155, Unknown=0, NotChecked=0, Total=8556 [2022-11-18 20:34:18,999 INFO L413 NwaCegarLoop]: 452 mSDtfsCounter, 24564 mSDsluCounter, 3599 mSDsCounter, 0 mSdLazyCounter, 7966 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24564 SdHoareTripleChecker+Valid, 4051 SdHoareTripleChecker+Invalid, 7974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 7966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:18,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24564 Valid, 4051 Invalid, 7974 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [8 Valid, 7966 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2022-11-18 20:34:19,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2022-11-18 20:34:19,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 629. [2022-11-18 20:34:19,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 1.6576433121019107) internal successors, (1041), 628 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:19,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1041 transitions. [2022-11-18 20:34:19,014 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1041 transitions. Word has length 414 [2022-11-18 20:34:19,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:19,015 INFO L495 AbstractCegarLoop]: Abstraction has 629 states and 1041 transitions. [2022-11-18 20:34:19,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.357142857142858) internal successors, (327), 14 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:19,015 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1041 transitions. [2022-11-18 20:34:19,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2022-11-18 20:34:19,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:19,018 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:19,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:19,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 20:34:19,219 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:34:19,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:19,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1469906990, now seen corresponding path program 1 times [2022-11-18 20:34:19,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:19,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808598154] [2022-11-18 20:34:19,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:19,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:19,324 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:34:19,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1719361339] [2022-11-18 20:34:19,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:19,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:19,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:19,326 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:19,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 20:34:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:20,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 3373 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-18 20:34:20,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:22,657 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:22,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:23,831 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-18 20:34:23,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:23,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808598154] [2022-11-18 20:34:23,832 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:34:23,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719361339] [2022-11-18 20:34:23,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719361339] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:23,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:34:23,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 22 [2022-11-18 20:34:23,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090181552] [2022-11-18 20:34:23,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:34:23,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:34:23,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:23,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:34:23,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:34:23,834 INFO L87 Difference]: Start difference. First operand 629 states and 1041 transitions. Second operand has 11 states, 11 states have (on average 29.727272727272727) internal successors, (327), 11 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:24,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:24,717 INFO L93 Difference]: Finished difference Result 2133 states and 3532 transitions. [2022-11-18 20:34:24,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 20:34:24,718 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 29.727272727272727) internal successors, (327), 11 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 414 [2022-11-18 20:34:24,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:24,722 INFO L225 Difference]: With dead ends: 2133 [2022-11-18 20:34:24,722 INFO L226 Difference]: Without dead ends: 1641 [2022-11-18 20:34:24,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 869 GetRequests, 827 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=313, Invalid=1579, Unknown=0, NotChecked=0, Total=1892 [2022-11-18 20:34:24,724 INFO L413 NwaCegarLoop]: 980 mSDtfsCounter, 7487 mSDsluCounter, 8614 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7487 SdHoareTripleChecker+Valid, 9594 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:24,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7487 Valid, 9594 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:34:24,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2022-11-18 20:34:24,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 605. [2022-11-18 20:34:24,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 1.6572847682119205) internal successors, (1001), 604 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:24,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1001 transitions. [2022-11-18 20:34:24,742 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1001 transitions. Word has length 414 [2022-11-18 20:34:24,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:24,742 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 1001 transitions. [2022-11-18 20:34:24,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 29.727272727272727) internal successors, (327), 11 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:24,743 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1001 transitions. [2022-11-18 20:34:24,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2022-11-18 20:34:24,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:24,746 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:24,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:24,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 20:34:24,958 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:34:24,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:24,959 INFO L85 PathProgramCache]: Analyzing trace with hash -51228276, now seen corresponding path program 1 times [2022-11-18 20:34:24,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:24,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549758715] [2022-11-18 20:34:24,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:24,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:25,063 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:34:25,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13875768] [2022-11-18 20:34:25,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:25,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:25,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:25,065 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:25,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 20:34:26,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:26,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 3376 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-18 20:34:26,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:28,428 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:28,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:30,092 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-18 20:34:30,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:30,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549758715] [2022-11-18 20:34:30,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:34:30,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13875768] [2022-11-18 20:34:30,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13875768] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:30,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:34:30,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [17] total 30 [2022-11-18 20:34:30,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227243563] [2022-11-18 20:34:30,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:34:30,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 20:34:30,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:30,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 20:34:30,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-11-18 20:34:30,096 INFO L87 Difference]: Start difference. First operand 605 states and 1001 transitions. Second operand has 15 states, 15 states have (on average 22.0) internal successors, (330), 15 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:42,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:42,978 INFO L93 Difference]: Finished difference Result 2733 states and 4517 transitions. [2022-11-18 20:34:42,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-18 20:34:42,979 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 22.0) internal successors, (330), 15 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 415 [2022-11-18 20:34:42,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:42,983 INFO L225 Difference]: With dead ends: 2733 [2022-11-18 20:34:42,983 INFO L226 Difference]: Without dead ends: 2731 [2022-11-18 20:34:42,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 964 GetRequests, 863 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3552 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1702, Invalid=8804, Unknown=0, NotChecked=0, Total=10506 [2022-11-18 20:34:42,987 INFO L413 NwaCegarLoop]: 446 mSDtfsCounter, 27732 mSDsluCounter, 3496 mSDsCounter, 0 mSdLazyCounter, 8316 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27732 SdHoareTripleChecker+Valid, 3942 SdHoareTripleChecker+Invalid, 8327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 8316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:42,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27732 Valid, 3942 Invalid, 8327 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11 Valid, 8316 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2022-11-18 20:34:42,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2731 states. [2022-11-18 20:34:43,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2731 to 632. [2022-11-18 20:34:43,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 1.6576862123613312) internal successors, (1046), 631 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:43,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 1046 transitions. [2022-11-18 20:34:43,008 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 1046 transitions. Word has length 415 [2022-11-18 20:34:43,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:43,009 INFO L495 AbstractCegarLoop]: Abstraction has 632 states and 1046 transitions. [2022-11-18 20:34:43,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 22.0) internal successors, (330), 15 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:43,010 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 1046 transitions. [2022-11-18 20:34:43,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2022-11-18 20:34:43,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:43,013 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:43,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:43,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:43,226 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:34:43,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:43,227 INFO L85 PathProgramCache]: Analyzing trace with hash -51168694, now seen corresponding path program 1 times [2022-11-18 20:34:43,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:43,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291519026] [2022-11-18 20:34:43,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:43,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:43,325 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:34:43,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976915643] [2022-11-18 20:34:43,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:43,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:43,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:43,327 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:43,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 20:34:44,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:44,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 3376 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-18 20:34:44,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:46,916 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:46,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:48,564 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-18 20:34:48,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:48,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291519026] [2022-11-18 20:34:48,565 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:34:48,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976915643] [2022-11-18 20:34:48,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976915643] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:48,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:34:48,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15] total 24 [2022-11-18 20:34:48,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66437115] [2022-11-18 20:34:48,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:34:48,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:34:48,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:48,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:34:48,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:34:48,568 INFO L87 Difference]: Start difference. First operand 632 states and 1046 transitions. Second operand has 12 states, 12 states have (on average 27.5) internal successors, (330), 12 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:49,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:49,646 INFO L93 Difference]: Finished difference Result 2163 states and 3582 transitions. [2022-11-18 20:34:49,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-18 20:34:49,647 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 27.5) internal successors, (330), 12 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 415 [2022-11-18 20:34:49,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:49,650 INFO L225 Difference]: With dead ends: 2163 [2022-11-18 20:34:49,650 INFO L226 Difference]: Without dead ends: 1665 [2022-11-18 20:34:49,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 877 GetRequests, 830 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=383, Invalid=1969, Unknown=0, NotChecked=0, Total=2352 [2022-11-18 20:34:49,652 INFO L413 NwaCegarLoop]: 978 mSDtfsCounter, 8264 mSDsluCounter, 9591 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8264 SdHoareTripleChecker+Valid, 10569 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:49,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8264 Valid, 10569 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:34:49,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2022-11-18 20:34:49,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 605. [2022-11-18 20:34:49,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 1.6572847682119205) internal successors, (1001), 604 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:49,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1001 transitions. [2022-11-18 20:34:49,668 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1001 transitions. Word has length 415 [2022-11-18 20:34:49,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:49,669 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 1001 transitions. [2022-11-18 20:34:49,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 27.5) internal successors, (330), 12 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:49,669 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1001 transitions. [2022-11-18 20:34:49,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2022-11-18 20:34:49,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:49,672 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:49,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:49,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:49,892 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:34:49,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:49,893 INFO L85 PathProgramCache]: Analyzing trace with hash -315496182, now seen corresponding path program 1 times [2022-11-18 20:34:49,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:49,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759347638] [2022-11-18 20:34:49,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:49,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:49,997 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:34:49,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146443420] [2022-11-18 20:34:49,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:49,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:49,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:49,999 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:50,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 20:34:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:51,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 3379 conjuncts, 109 conjunts are in the unsatisfiable core [2022-11-18 20:34:51,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:53,341 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:53,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-18 20:34:55,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:55,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759347638] [2022-11-18 20:34:55,442 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:34:55,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146443420] [2022-11-18 20:34:55,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146443420] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:55,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:34:55,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [18] total 32 [2022-11-18 20:34:55,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078052530] [2022-11-18 20:34:55,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:34:55,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 20:34:55,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:55,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 20:34:55,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2022-11-18 20:34:55,445 INFO L87 Difference]: Start difference. First operand 605 states and 1001 transitions. Second operand has 16 states, 16 states have (on average 20.8125) internal successors, (333), 16 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:10,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:35:10,128 INFO L93 Difference]: Finished difference Result 2784 states and 4602 transitions. [2022-11-18 20:35:10,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-18 20:35:10,129 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 20.8125) internal successors, (333), 16 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 416 [2022-11-18 20:35:10,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:35:10,133 INFO L225 Difference]: With dead ends: 2784 [2022-11-18 20:35:10,133 INFO L226 Difference]: Without dead ends: 2782 [2022-11-18 20:35:10,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 982 GetRequests, 871 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4325 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2032, Invalid=10624, Unknown=0, NotChecked=0, Total=12656 [2022-11-18 20:35:10,138 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 31486 mSDsluCounter, 3711 mSDsCounter, 0 mSdLazyCounter, 8882 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31486 SdHoareTripleChecker+Valid, 4151 SdHoareTripleChecker+Invalid, 8893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 8882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:35:10,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31486 Valid, 4151 Invalid, 8893 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11 Valid, 8882 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2022-11-18 20:35:10,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2782 states. [2022-11-18 20:35:10,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2782 to 635. [2022-11-18 20:35:10,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 1.6577287066246056) internal successors, (1051), 634 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:10,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1051 transitions. [2022-11-18 20:35:10,160 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1051 transitions. Word has length 416 [2022-11-18 20:35:10,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:35:10,161 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 1051 transitions. [2022-11-18 20:35:10,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 20.8125) internal successors, (333), 16 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:10,161 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1051 transitions. [2022-11-18 20:35:10,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2022-11-18 20:35:10,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:35:10,164 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:35:10,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-18 20:35:10,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-18 20:35:10,385 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:35:10,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:35:10,386 INFO L85 PathProgramCache]: Analyzing trace with hash -315436600, now seen corresponding path program 1 times [2022-11-18 20:35:10,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:35:10,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630587062] [2022-11-18 20:35:10,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:10,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:35:10,502 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:35:10,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1708271615] [2022-11-18 20:35:10,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:10,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:35:10,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:35:10,504 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:35:10,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 20:35:12,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:35:12,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 3379 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-18 20:35:12,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:35:14,274 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:35:14,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:35:15,683 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-18 20:35:15,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:35:15,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630587062] [2022-11-18 20:35:15,683 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:35:15,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708271615] [2022-11-18 20:35:15,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708271615] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:35:15,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:35:15,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [16] total 26 [2022-11-18 20:35:15,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732011672] [2022-11-18 20:35:15,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:35:15,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:35:15,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:35:15,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:35:15,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:35:15,686 INFO L87 Difference]: Start difference. First operand 635 states and 1051 transitions. Second operand has 13 states, 13 states have (on average 25.615384615384617) internal successors, (333), 13 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:17,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:35:17,029 INFO L93 Difference]: Finished difference Result 2193 states and 3632 transitions. [2022-11-18 20:35:17,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-18 20:35:17,034 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 25.615384615384617) internal successors, (333), 13 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 416 [2022-11-18 20:35:17,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:35:17,036 INFO L225 Difference]: With dead ends: 2193 [2022-11-18 20:35:17,037 INFO L226 Difference]: Without dead ends: 1689 [2022-11-18 20:35:17,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 885 GetRequests, 833 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=460, Invalid=2402, Unknown=0, NotChecked=0, Total=2862 [2022-11-18 20:35:17,039 INFO L413 NwaCegarLoop]: 976 mSDtfsCounter, 9046 mSDsluCounter, 10566 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9046 SdHoareTripleChecker+Valid, 11542 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:35:17,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9046 Valid, 11542 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:35:17,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2022-11-18 20:35:17,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 605. [2022-11-18 20:35:17,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 1.6572847682119205) internal successors, (1001), 604 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:17,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1001 transitions. [2022-11-18 20:35:17,058 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1001 transitions. Word has length 416 [2022-11-18 20:35:17,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:35:17,058 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 1001 transitions. [2022-11-18 20:35:17,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 25.615384615384617) internal successors, (333), 13 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:17,059 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1001 transitions. [2022-11-18 20:35:17,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2022-11-18 20:35:17,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:35:17,062 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:35:17,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-18 20:35:17,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-18 20:35:17,284 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:35:17,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:35:17,285 INFO L85 PathProgramCache]: Analyzing trace with hash 976178480, now seen corresponding path program 1 times [2022-11-18 20:35:17,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:35:17,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106533323] [2022-11-18 20:35:17,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:17,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:35:17,389 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:35:17,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083473903] [2022-11-18 20:35:17,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:17,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:35:17,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:35:17,392 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:35:17,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 20:35:19,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:35:19,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 3382 conjuncts, 113 conjunts are in the unsatisfiable core [2022-11-18 20:35:19,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:35:20,970 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:35:20,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:35:23,424 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-18 20:35:23,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:35:23,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106533323] [2022-11-18 20:35:23,425 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:35:23,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083473903] [2022-11-18 20:35:23,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083473903] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:35:23,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:35:23,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [19] total 34 [2022-11-18 20:35:23,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039777009] [2022-11-18 20:35:23,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:35:23,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 20:35:23,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:35:23,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 20:35:23,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1021, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 20:35:23,429 INFO L87 Difference]: Start difference. First operand 605 states and 1001 transitions. Second operand has 17 states, 17 states have (on average 19.764705882352942) internal successors, (336), 17 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:39,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:35:39,259 INFO L93 Difference]: Finished difference Result 2840 states and 4694 transitions. [2022-11-18 20:35:39,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-18 20:35:39,259 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 19.764705882352942) internal successors, (336), 17 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 417 [2022-11-18 20:35:39,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:35:39,262 INFO L225 Difference]: With dead ends: 2840 [2022-11-18 20:35:39,263 INFO L226 Difference]: Without dead ends: 2838 [2022-11-18 20:35:39,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 996 GetRequests, 877 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5035 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2327, Invalid=12193, Unknown=0, NotChecked=0, Total=14520 [2022-11-18 20:35:39,265 INFO L413 NwaCegarLoop]: 434 mSDtfsCounter, 29337 mSDsluCounter, 4472 mSDsCounter, 0 mSdLazyCounter, 10346 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29337 SdHoareTripleChecker+Valid, 4906 SdHoareTripleChecker+Invalid, 10354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 10346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:35:39,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29337 Valid, 4906 Invalid, 10354 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [8 Valid, 10346 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2022-11-18 20:35:39,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2838 states. [2022-11-18 20:35:39,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2838 to 638. [2022-11-18 20:35:39,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 1.6577708006279435) internal successors, (1056), 637 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:39,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1056 transitions. [2022-11-18 20:35:39,312 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1056 transitions. Word has length 417 [2022-11-18 20:35:39,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:35:39,312 INFO L495 AbstractCegarLoop]: Abstraction has 638 states and 1056 transitions. [2022-11-18 20:35:39,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 19.764705882352942) internal successors, (336), 17 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:39,328 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1056 transitions. [2022-11-18 20:35:39,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2022-11-18 20:35:39,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:35:39,330 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:35:39,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-18 20:35:39,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:35:39,538 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:35:39,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:35:39,539 INFO L85 PathProgramCache]: Analyzing trace with hash 976238062, now seen corresponding path program 1 times [2022-11-18 20:35:39,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:35:39,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196890791] [2022-11-18 20:35:39,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:39,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:35:39,634 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:35:39,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635691021] [2022-11-18 20:35:39,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:39,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:35:39,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:35:39,636 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:35:39,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 20:35:41,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:35:41,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 3382 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-18 20:35:41,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:35:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:35:43,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:35:45,058 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-18 20:35:45,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:35:45,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196890791] [2022-11-18 20:35:45,059 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:35:45,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635691021] [2022-11-18 20:35:45,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635691021] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:35:45,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:35:45,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [17] total 28 [2022-11-18 20:35:45,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569052968] [2022-11-18 20:35:45,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:35:45,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:35:45,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:35:45,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:35:45,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2022-11-18 20:35:45,062 INFO L87 Difference]: Start difference. First operand 638 states and 1056 transitions. Second operand has 14 states, 14 states have (on average 24.0) internal successors, (336), 14 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:46,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:35:46,631 INFO L93 Difference]: Finished difference Result 2223 states and 3682 transitions. [2022-11-18 20:35:46,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-18 20:35:46,632 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 24.0) internal successors, (336), 14 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 417 [2022-11-18 20:35:46,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:35:46,634 INFO L225 Difference]: With dead ends: 2223 [2022-11-18 20:35:46,634 INFO L226 Difference]: Without dead ends: 1713 [2022-11-18 20:35:46,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 893 GetRequests, 836 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=544, Invalid=2878, Unknown=0, NotChecked=0, Total=3422 [2022-11-18 20:35:46,635 INFO L413 NwaCegarLoop]: 974 mSDtfsCounter, 9833 mSDsluCounter, 11539 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9833 SdHoareTripleChecker+Valid, 12513 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:35:46,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9833 Valid, 12513 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:35:46,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2022-11-18 20:35:46,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 605. [2022-11-18 20:35:46,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 1.6572847682119205) internal successors, (1001), 604 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:46,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1001 transitions. [2022-11-18 20:35:46,652 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1001 transitions. Word has length 417 [2022-11-18 20:35:46,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:35:46,653 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 1001 transitions. [2022-11-18 20:35:46,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 24.0) internal successors, (336), 14 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:46,653 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1001 transitions. [2022-11-18 20:35:46,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2022-11-18 20:35:46,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:35:46,656 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:35:46,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-18 20:35:46,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-18 20:35:46,862 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:35:46,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:35:46,863 INFO L85 PathProgramCache]: Analyzing trace with hash -340066078, now seen corresponding path program 1 times [2022-11-18 20:35:46,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:35:46,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170728897] [2022-11-18 20:35:46,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:46,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:35:46,959 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:35:46,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1538765798] [2022-11-18 20:35:46,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:46,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:35:46,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:35:46,961 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:35:46,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-18 20:35:48,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:35:48,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 3385 conjuncts, 117 conjunts are in the unsatisfiable core [2022-11-18 20:35:48,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:35:50,550 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:35:50,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:35:52,578 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-18 20:35:52,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:35:52,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170728897] [2022-11-18 20:35:52,578 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:35:52,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538765798] [2022-11-18 20:35:52,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538765798] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:35:52,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:35:52,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [20] total 36 [2022-11-18 20:35:52,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323740465] [2022-11-18 20:35:52,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:35:52,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:35:52,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:35:52,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:35:52,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1153, Unknown=0, NotChecked=0, Total=1260 [2022-11-18 20:35:52,581 INFO L87 Difference]: Start difference. First operand 605 states and 1001 transitions. Second operand has 18 states, 18 states have (on average 18.833333333333332) internal successors, (339), 18 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:10,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:36:10,481 INFO L93 Difference]: Finished difference Result 2886 states and 4772 transitions. [2022-11-18 20:36:10,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-11-18 20:36:10,481 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 18.833333333333332) internal successors, (339), 18 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 418 [2022-11-18 20:36:10,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:36:10,483 INFO L225 Difference]: With dead ends: 2886 [2022-11-18 20:36:10,483 INFO L226 Difference]: Without dead ends: 2884 [2022-11-18 20:36:10,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1018 GetRequests, 887 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6099 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=2779, Invalid=14777, Unknown=0, NotChecked=0, Total=17556 [2022-11-18 20:36:10,485 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 33820 mSDsluCounter, 4695 mSDsCounter, 0 mSdLazyCounter, 10914 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33820 SdHoareTripleChecker+Valid, 5123 SdHoareTripleChecker+Invalid, 10922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 10914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:36:10,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33820 Valid, 5123 Invalid, 10922 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [8 Valid, 10914 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2022-11-18 20:36:10,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2884 states. [2022-11-18 20:36:10,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2884 to 641. [2022-11-18 20:36:10,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 640 states have (on average 1.6578125) internal successors, (1061), 640 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:10,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1061 transitions. [2022-11-18 20:36:10,506 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1061 transitions. Word has length 418 [2022-11-18 20:36:10,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:10,507 INFO L495 AbstractCegarLoop]: Abstraction has 641 states and 1061 transitions. [2022-11-18 20:36:10,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 18.833333333333332) internal successors, (339), 18 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:10,507 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1061 transitions. [2022-11-18 20:36:10,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2022-11-18 20:36:10,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:10,511 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:36:10,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-18 20:36:10,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:10,732 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:36:10,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:10,732 INFO L85 PathProgramCache]: Analyzing trace with hash -340006496, now seen corresponding path program 1 times [2022-11-18 20:36:10,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:10,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628538953] [2022-11-18 20:36:10,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:10,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:10,837 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:36:10,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905123866] [2022-11-18 20:36:10,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:10,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:10,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:10,838 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:10,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-18 20:36:12,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:12,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 3385 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-18 20:36:12,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:14,512 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:36:14,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-18 20:36:16,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:16,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628538953] [2022-11-18 20:36:16,267 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:36:16,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905123866] [2022-11-18 20:36:16,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905123866] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:36:16,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:36:16,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [18] total 30 [2022-11-18 20:36:16,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740287969] [2022-11-18 20:36:16,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:36:16,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 20:36:16,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:16,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 20:36:16,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2022-11-18 20:36:16,270 INFO L87 Difference]: Start difference. First operand 641 states and 1061 transitions. Second operand has 15 states, 15 states have (on average 22.6) internal successors, (339), 15 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:18,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:36:18,071 INFO L93 Difference]: Finished difference Result 2253 states and 3732 transitions. [2022-11-18 20:36:18,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-18 20:36:18,072 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 22.6) internal successors, (339), 15 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 418 [2022-11-18 20:36:18,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:36:18,073 INFO L225 Difference]: With dead ends: 2253 [2022-11-18 20:36:18,073 INFO L226 Difference]: Without dead ends: 1737 [2022-11-18 20:36:18,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 839 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=635, Invalid=3397, Unknown=0, NotChecked=0, Total=4032 [2022-11-18 20:36:18,075 INFO L413 NwaCegarLoop]: 972 mSDtfsCounter, 10625 mSDsluCounter, 12510 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10625 SdHoareTripleChecker+Valid, 13482 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:36:18,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10625 Valid, 13482 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:36:18,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2022-11-18 20:36:18,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 605. [2022-11-18 20:36:18,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 1.6572847682119205) internal successors, (1001), 604 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:18,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1001 transitions. [2022-11-18 20:36:18,092 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1001 transitions. Word has length 418 [2022-11-18 20:36:18,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:18,093 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 1001 transitions. [2022-11-18 20:36:18,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 22.6) internal successors, (339), 15 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:18,093 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1001 transitions. [2022-11-18 20:36:18,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2022-11-18 20:36:18,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:18,097 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:36:18,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-18 20:36:18,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-18 20:36:18,310 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:36:18,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:18,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1422684822, now seen corresponding path program 1 times [2022-11-18 20:36:18,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:18,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535815734] [2022-11-18 20:36:18,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:18,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:18,421 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:36:18,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055743090] [2022-11-18 20:36:18,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:18,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:18,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:18,423 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:18,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-18 20:36:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:20,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 3388 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-18 20:36:20,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:36:22,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:25,638 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 38 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:36:25,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:25,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535815734] [2022-11-18 20:36:25,638 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:36:25,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055743090] [2022-11-18 20:36:25,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055743090] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:36:25,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:36:25,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2022-11-18 20:36:25,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117386936] [2022-11-18 20:36:25,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:36:25,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 20:36:25,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:25,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 20:36:25,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-11-18 20:36:25,641 INFO L87 Difference]: Start difference. First operand 605 states and 1001 transitions. Second operand has 25 states, 25 states have (on average 33.44) internal successors, (836), 25 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:37:02,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:37:02,551 INFO L93 Difference]: Finished difference Result 21308 states and 35278 transitions. [2022-11-18 20:37:02,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 231 states. [2022-11-18 20:37:02,552 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 33.44) internal successors, (836), 25 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2022-11-18 20:37:02,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:37:02,569 INFO L225 Difference]: With dead ends: 21308 [2022-11-18 20:37:02,569 INFO L226 Difference]: Without dead ends: 20825 [2022-11-18 20:37:02,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1111 GetRequests, 862 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25781 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=9954, Invalid=52796, Unknown=0, NotChecked=0, Total=62750 [2022-11-18 20:37:02,577 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 127220 mSDsluCounter, 4392 mSDsCounter, 0 mSdLazyCounter, 19623 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127220 SdHoareTripleChecker+Valid, 4618 SdHoareTripleChecker+Invalid, 19773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 19623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:37:02,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127220 Valid, 4618 Invalid, 19773 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [150 Valid, 19623 Invalid, 0 Unknown, 0 Unchecked, 21.8s Time] [2022-11-18 20:37:02,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20825 states. [2022-11-18 20:37:02,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20825 to 1289. [2022-11-18 20:37:02,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1288 states have (on average 1.656832298136646) internal successors, (2134), 1288 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:37:02,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 2134 transitions. [2022-11-18 20:37:02,674 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 2134 transitions. Word has length 419 [2022-11-18 20:37:02,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:37:02,674 INFO L495 AbstractCegarLoop]: Abstraction has 1289 states and 2134 transitions. [2022-11-18 20:37:02,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 33.44) internal successors, (836), 25 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:37:02,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 2134 transitions. [2022-11-18 20:37:02,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2022-11-18 20:37:02,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:37:02,679 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:37:02,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-18 20:37:02,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-18 20:37:02,895 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:37:02,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:37:02,895 INFO L85 PathProgramCache]: Analyzing trace with hash -937400474, now seen corresponding path program 1 times [2022-11-18 20:37:02,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:37:02,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210918281] [2022-11-18 20:37:02,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:37:02,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:37:02,990 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:37:02,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [92547850] [2022-11-18 20:37:02,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:37:02,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:37:02,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:37:02,991 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:37:02,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-18 20:37:04,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:37:04,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 3391 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-18 20:37:04,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:37:08,026 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:37:08,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:37:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 30 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:37:12,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:37:12,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210918281] [2022-11-18 20:37:12,169 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:37:12,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92547850] [2022-11-18 20:37:12,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92547850] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:37:12,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:37:12,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2022-11-18 20:37:12,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195227057] [2022-11-18 20:37:12,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:37:12,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-18 20:37:12,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:37:12,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-18 20:37:12,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 20:37:12,172 INFO L87 Difference]: Start difference. First operand 1289 states and 2134 transitions. Second operand has 33 states, 33 states have (on average 25.393939393939394) internal successors, (838), 33 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:23,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:23,955 INFO L93 Difference]: Finished difference Result 45086 states and 74698 transitions. [2022-11-18 20:38:23,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 415 states. [2022-11-18 20:38:23,956 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 25.393939393939394) internal successors, (838), 33 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 420 [2022-11-18 20:38:23,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:23,985 INFO L225 Difference]: With dead ends: 45086 [2022-11-18 20:38:23,985 INFO L226 Difference]: Without dead ends: 43799 [2022-11-18 20:38:23,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1302 GetRequests, 862 SyntacticMatches, 0 SemanticMatches, 440 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85319 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=24724, Invalid=170198, Unknown=0, NotChecked=0, Total=194922 [2022-11-18 20:38:24,000 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 98818 mSDsluCounter, 8611 mSDsCounter, 0 mSdLazyCounter, 39674 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98818 SdHoareTripleChecker+Valid, 9008 SdHoareTripleChecker+Invalid, 39771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 39674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:24,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98818 Valid, 9008 Invalid, 39771 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [97 Valid, 39674 Invalid, 0 Unknown, 0 Unchecked, 38.7s Time] [2022-11-18 20:38:24,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43799 states. [2022-11-18 20:38:24,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43799 to 1313. [2022-11-18 20:38:24,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1312 states have (on average 1.6570121951219512) internal successors, (2174), 1312 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:24,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 2174 transitions. [2022-11-18 20:38:24,239 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 2174 transitions. Word has length 420 [2022-11-18 20:38:24,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:24,239 INFO L495 AbstractCegarLoop]: Abstraction has 1313 states and 2174 transitions. [2022-11-18 20:38:24,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 25.393939393939394) internal successors, (838), 33 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:24,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 2174 transitions. [2022-11-18 20:38:24,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2022-11-18 20:38:24,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:24,244 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:24,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-18 20:38:24,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-18 20:38:24,465 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:38:24,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:24,466 INFO L85 PathProgramCache]: Analyzing trace with hash 217394686, now seen corresponding path program 1 times [2022-11-18 20:38:24,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:24,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355848912] [2022-11-18 20:38:24,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:24,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:24,564 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:38:24,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1007882089] [2022-11-18 20:38:24,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:24,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:24,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:38:24,566 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:38:24,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-18 20:38:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:26,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 3394 conjuncts, 113 conjunts are in the unsatisfiable core [2022-11-18 20:38:26,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:38:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:30,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:38:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 22 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:34,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:34,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355848912] [2022-11-18 20:38:34,946 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:38:34,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007882089] [2022-11-18 20:38:34,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007882089] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:38:34,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:38:34,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 39 [2022-11-18 20:38:34,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49164256] [2022-11-18 20:38:34,947 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:38:34,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-18 20:38:34,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:34,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-18 20:38:34,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1361, Unknown=0, NotChecked=0, Total=1482 [2022-11-18 20:38:34,949 INFO L87 Difference]: Start difference. First operand 1313 states and 2174 transitions. Second operand has 39 states, 39 states have (on average 21.53846153846154) internal successors, (840), 39 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:40:11,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:40:11,904 INFO L93 Difference]: Finished difference Result 57051 states and 94524 transitions. [2022-11-18 20:40:11,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 556 states. [2022-11-18 20:40:11,905 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 21.53846153846154) internal successors, (840), 39 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 421 [2022-11-18 20:40:11,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:40:11,950 INFO L225 Difference]: With dead ends: 57051 [2022-11-18 20:40:11,950 INFO L226 Difference]: Without dead ends: 55740 [2022-11-18 20:40:11,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1445 GetRequests, 858 SyntacticMatches, 0 SemanticMatches, 587 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153738 ImplicationChecksByTransitivity, 45.3s TimeCoverageRelationStatistics Valid=40576, Invalid=305756, Unknown=0, NotChecked=0, Total=346332 [2022-11-18 20:40:11,971 INFO L413 NwaCegarLoop]: 383 mSDtfsCounter, 106434 mSDsluCounter, 10569 mSDsCounter, 0 mSdLazyCounter, 49669 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106434 SdHoareTripleChecker+Valid, 10952 SdHoareTripleChecker+Invalid, 49778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 49669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:40:11,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106434 Valid, 10952 Invalid, 49778 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [109 Valid, 49669 Invalid, 0 Unknown, 0 Unchecked, 45.2s Time] [2022-11-18 20:40:12,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55740 states. [2022-11-18 20:40:12,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55740 to 1337. [2022-11-18 20:40:12,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1336 states have (on average 1.657185628742515) internal successors, (2214), 1336 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:40:12,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 2214 transitions. [2022-11-18 20:40:12,261 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 2214 transitions. Word has length 421 [2022-11-18 20:40:12,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:40:12,261 INFO L495 AbstractCegarLoop]: Abstraction has 1337 states and 2214 transitions. [2022-11-18 20:40:12,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 21.53846153846154) internal successors, (840), 39 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:40:12,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 2214 transitions. [2022-11-18 20:40:12,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2022-11-18 20:40:12,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:40:12,266 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:40:12,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-11-18 20:40:12,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-18 20:40:12,482 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:40:12,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:40:12,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1984287234, now seen corresponding path program 1 times [2022-11-18 20:40:12,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:40:12,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663013734] [2022-11-18 20:40:12,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:40:12,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:40:12,582 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:40:12,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399042149] [2022-11-18 20:40:12,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:40:12,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:40:12,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:40:12,584 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:40:12,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-18 20:40:14,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:40:14,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 3397 conjuncts, 129 conjunts are in the unsatisfiable core [2022-11-18 20:40:14,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:40:18,254 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:40:18,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:40:23,648 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:40:23,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:40:23,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663013734] [2022-11-18 20:40:23,649 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:40:23,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399042149] [2022-11-18 20:40:23,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399042149] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:40:23,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:40:23,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2022-11-18 20:40:23,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235351162] [2022-11-18 20:40:23,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:40:23,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-18 20:40:23,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:40:23,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-18 20:40:23,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1844, Unknown=0, NotChecked=0, Total=1980 [2022-11-18 20:40:23,651 INFO L87 Difference]: Start difference. First operand 1337 states and 2214 transitions. Second operand has 45 states, 45 states have (on average 18.711111111111112) internal successors, (842), 45 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:35,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:42:35,884 INFO L93 Difference]: Finished difference Result 59145 states and 98014 transitions. [2022-11-18 20:42:35,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 697 states. [2022-11-18 20:42:35,885 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 18.711111111111112) internal successors, (842), 45 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 422 [2022-11-18 20:42:35,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:42:35,930 INFO L225 Difference]: With dead ends: 59145 [2022-11-18 20:42:35,930 INFO L226 Difference]: Without dead ends: 57810 [2022-11-18 20:42:36,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1588 GetRequests, 854 SyntacticMatches, 0 SemanticMatches, 734 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242007 ImplicationChecksByTransitivity, 70.9s TimeCoverageRelationStatistics Valid=60199, Invalid=480761, Unknown=0, NotChecked=0, Total=540960 [2022-11-18 20:42:36,130 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 126688 mSDsluCounter, 11504 mSDsCounter, 0 mSdLazyCounter, 55731 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126688 SdHoareTripleChecker+Valid, 11874 SdHoareTripleChecker+Invalid, 55835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 55731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:42:36,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126688 Valid, 11874 Invalid, 55835 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [104 Valid, 55731 Invalid, 0 Unknown, 0 Unchecked, 53.5s Time] [2022-11-18 20:42:36,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57810 states. [2022-11-18 20:42:36,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57810 to 1367. [2022-11-18 20:42:36,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 1.657393850658858) internal successors, (2264), 1366 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:36,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 2264 transitions. [2022-11-18 20:42:36,397 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 2264 transitions. Word has length 422 [2022-11-18 20:42:36,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:42:36,398 INFO L495 AbstractCegarLoop]: Abstraction has 1367 states and 2264 transitions. [2022-11-18 20:42:36,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 18.711111111111112) internal successors, (842), 45 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:42:36,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 2264 transitions. [2022-11-18 20:42:36,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2022-11-18 20:42:36,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:42:36,404 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:42:36,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-11-18 20:42:36,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:42:36,618 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:42:36,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:42:36,619 INFO L85 PathProgramCache]: Analyzing trace with hash -194918142, now seen corresponding path program 1 times [2022-11-18 20:42:36,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:42:36,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439248836] [2022-11-18 20:42:36,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:42:36,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:42:36,745 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:42:36,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628057995] [2022-11-18 20:42:36,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:42:36,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:42:36,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:42:36,748 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:42:36,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-18 20:42:38,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:42:38,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 3400 conjuncts, 129 conjunts are in the unsatisfiable core [2022-11-18 20:42:38,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:42:42,931 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:42:42,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:42:48,749 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 14 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:42:48,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:42:48,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439248836] [2022-11-18 20:42:48,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:42:48,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628057995] [2022-11-18 20:42:48,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628057995] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:42:48,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:42:48,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2022-11-18 20:42:48,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39889811] [2022-11-18 20:42:48,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:42:48,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-18 20:42:48,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:42:48,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-18 20:42:48,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1844, Unknown=0, NotChecked=0, Total=1980 [2022-11-18 20:42:48,752 INFO L87 Difference]: Start difference. First operand 1367 states and 2264 transitions. Second operand has 45 states, 45 states have (on average 18.755555555555556) internal successors, (844), 45 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:45:05,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:05,110 INFO L93 Difference]: Finished difference Result 60951 states and 100992 transitions. [2022-11-18 20:45:05,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 697 states. [2022-11-18 20:45:05,111 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 18.755555555555556) internal successors, (844), 45 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 423 [2022-11-18 20:45:05,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:05,168 INFO L225 Difference]: With dead ends: 60951 [2022-11-18 20:45:05,168 INFO L226 Difference]: Without dead ends: 59586 [2022-11-18 20:45:05,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1590 GetRequests, 856 SyntacticMatches, 0 SemanticMatches, 734 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242064 ImplicationChecksByTransitivity, 74.1s TimeCoverageRelationStatistics Valid=60199, Invalid=480761, Unknown=0, NotChecked=0, Total=540960 [2022-11-18 20:45:05,200 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 129998 mSDsluCounter, 11118 mSDsCounter, 0 mSdLazyCounter, 53444 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129998 SdHoareTripleChecker+Valid, 11488 SdHoareTripleChecker+Invalid, 53551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 53444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:05,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129998 Valid, 11488 Invalid, 53551 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [107 Valid, 53444 Invalid, 0 Unknown, 0 Unchecked, 54.0s Time] [2022-11-18 20:45:05,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59586 states. [2022-11-18 20:45:05,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59586 to 1367. [2022-11-18 20:45:05,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 1.657393850658858) internal successors, (2264), 1366 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:45:05,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 2264 transitions. [2022-11-18 20:45:05,466 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 2264 transitions. Word has length 423 [2022-11-18 20:45:05,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:05,467 INFO L495 AbstractCegarLoop]: Abstraction has 1367 states and 2264 transitions. [2022-11-18 20:45:05,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 18.755555555555556) internal successors, (844), 45 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:45:05,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 2264 transitions. [2022-11-18 20:45:05,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2022-11-18 20:45:05,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:05,472 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:05,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-11-18 20:45:05,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-18 20:45:05,676 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:45:05,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:05,677 INFO L85 PathProgramCache]: Analyzing trace with hash 182225634, now seen corresponding path program 1 times [2022-11-18 20:45:05,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:05,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071569187] [2022-11-18 20:45:05,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:05,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:05,820 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:45:05,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [145425254] [2022-11-18 20:45:05,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:05,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:05,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:05,822 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:05,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-18 20:45:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:08,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 3403 conjuncts, 153 conjunts are in the unsatisfiable core [2022-11-18 20:45:08,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:12,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:12,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071569187] [2022-11-18 20:45:12,571 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:45:12,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145425254] [2022-11-18 20:45:12,571 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-11-18 20:45:12,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:12,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:12,772 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Maybe an infinite loop at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:345) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-18 20:45:12,777 INFO L158 Benchmark]: Toolchain (without parser) took 794769.08ms. Allocated memory was 121.6MB in the beginning and 1.8GB in the end (delta: 1.7GB). Free memory was 78.2MB in the beginning and 669.4MB in the end (delta: -591.2MB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. [2022-11-18 20:45:12,777 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 121.6MB. Free memory is still 97.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 20:45:12,777 INFO L158 Benchmark]: CACSL2BoogieTranslator took 924.40ms. Allocated memory is still 121.6MB. Free memory was 77.9MB in the beginning and 49.4MB in the end (delta: 28.5MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2022-11-18 20:45:12,778 INFO L158 Benchmark]: Boogie Procedure Inliner took 258.37ms. Allocated memory was 121.6MB in the beginning and 167.8MB in the end (delta: 46.1MB). Free memory was 49.4MB in the beginning and 121.2MB in the end (delta: -71.8MB). Peak memory consumption was 19.1MB. Max. memory is 16.1GB. [2022-11-18 20:45:12,778 INFO L158 Benchmark]: Boogie Preprocessor took 182.16ms. Allocated memory is still 167.8MB. Free memory was 121.2MB in the beginning and 108.6MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-18 20:45:12,779 INFO L158 Benchmark]: RCFGBuilder took 3373.56ms. Allocated memory was 167.8MB in the beginning and 262.1MB in the end (delta: 94.4MB). Free memory was 108.6MB in the beginning and 205.1MB in the end (delta: -96.5MB). Peak memory consumption was 116.2MB. Max. memory is 16.1GB. [2022-11-18 20:45:12,779 INFO L158 Benchmark]: TraceAbstraction took 790022.13ms. Allocated memory was 262.1MB in the beginning and 1.8GB in the end (delta: 1.6GB). Free memory was 204.0MB in the beginning and 669.4MB in the end (delta: -465.3MB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. [2022-11-18 20:45:12,781 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 121.6MB. Free memory is still 97.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 924.40ms. Allocated memory is still 121.6MB. Free memory was 77.9MB in the beginning and 49.4MB in the end (delta: 28.5MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 258.37ms. Allocated memory was 121.6MB in the beginning and 167.8MB in the end (delta: 46.1MB). Free memory was 49.4MB in the beginning and 121.2MB in the end (delta: -71.8MB). Peak memory consumption was 19.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 182.16ms. Allocated memory is still 167.8MB. Free memory was 121.2MB in the beginning and 108.6MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * RCFGBuilder took 3373.56ms. Allocated memory was 167.8MB in the beginning and 262.1MB in the end (delta: 94.4MB). Free memory was 108.6MB in the beginning and 205.1MB in the end (delta: -96.5MB). Peak memory consumption was 116.2MB. Max. memory is 16.1GB. * TraceAbstraction took 790022.13ms. Allocated memory was 262.1MB in the beginning and 1.8GB in the end (delta: 1.6GB). Free memory was 204.0MB in the beginning and 669.4MB in the end (delta: -465.3MB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Maybe an infinite loop de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Maybe an infinite loop: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-18 20:45:12,989 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-11-18 20:45:13,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.fischer.2.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash b1c8e0ca4434a3155268f4fdeec8cb4441ab99f0362813399669fdc1baa79ade --- 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-8393723 [2022-11-18 20:45:15,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:45:15,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:45:15,673 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:45:15,673 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:45:15,678 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:45:15,682 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:45:15,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:45:15,692 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:45:15,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:45:15,698 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:45:15,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:45:15,703 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:45:15,709 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:45:15,711 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:45:15,713 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:45:15,715 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:45:15,717 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:45:15,720 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:45:15,726 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:45:15,734 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:45:15,736 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:45:15,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:45:15,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:45:15,745 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:45:15,750 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:45:15,751 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:45:15,752 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:45:15,758 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:45:15,760 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:45:15,761 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:45:15,762 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:45:15,764 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:45:15,766 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:45:15,767 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:45:15,767 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:45:15,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:45:15,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:45:15,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:45:15,772 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:45:15,773 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:45:15,779 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-11-18 20:45:15,824 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:45:15,825 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:45:15,826 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:45:15,826 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:45:15,828 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:45:15,828 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:45:15,830 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:45:15,830 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:45:15,830 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:45:15,831 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:45:15,832 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:45:15,833 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:45:15,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:45:15,833 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:45:15,834 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 20:45:15,834 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-18 20:45:15,835 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-18 20:45:15,835 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:45:15,835 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:45:15,836 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:45:15,836 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:45:15,836 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:45:15,837 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:45:15,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:45:15,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:45:15,838 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:45:15,839 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:45:15,839 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-18 20:45:15,839 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-18 20:45:15,840 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:45:15,840 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:45:15,840 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:45:15,841 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-18 20:45:15,841 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_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1c8e0ca4434a3155268f4fdeec8cb4441ab99f0362813399669fdc1baa79ade [2022-11-18 20:45:16,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:45:16,329 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:45:16,335 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:45:16,337 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:45:16,340 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:45:16,342 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.fischer.2.prop1-back-serstep.c [2022-11-18 20:45:16,432 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/data/ce770ed55/66e4800f90c94a29b6c1817cb7c7a880/FLAG2c23eab92 [2022-11-18 20:45:17,250 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:45:17,251 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.fischer.2.prop1-back-serstep.c [2022-11-18 20:45:17,265 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/data/ce770ed55/66e4800f90c94a29b6c1817cb7c7a880/FLAG2c23eab92 [2022-11-18 20:45:17,444 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/data/ce770ed55/66e4800f90c94a29b6c1817cb7c7a880 [2022-11-18 20:45:17,447 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:45:17,450 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:45:17,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:45:17,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:45:17,459 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:45:17,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:45:17" (1/1) ... [2022-11-18 20:45:17,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21853dba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:17, skipping insertion in model container [2022-11-18 20:45:17,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:45:17" (1/1) ... [2022-11-18 20:45:17,472 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:45:17,558 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:45:17,807 WARN L234 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_ef95d031-3975-46c8-919d-ea5a4bc2c204/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.fischer.2.prop1-back-serstep.c[1014,1027] [2022-11-18 20:45:18,217 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:45:18,222 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:45:18,235 WARN L234 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_ef95d031-3975-46c8-919d-ea5a4bc2c204/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.fischer.2.prop1-back-serstep.c[1014,1027] [2022-11-18 20:45:18,473 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:45:18,500 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:45:18,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:18 WrapperNode [2022-11-18 20:45:18,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:45:18,504 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:45:18,504 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:45:18,504 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:45:18,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:18" (1/1) ... [2022-11-18 20:45:18,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:18" (1/1) ... [2022-11-18 20:45:18,680 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1628 [2022-11-18 20:45:18,680 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:45:18,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:45:18,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:45:18,681 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:45:18,694 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:18" (1/1) ... [2022-11-18 20:45:18,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:18" (1/1) ... [2022-11-18 20:45:18,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:18" (1/1) ... [2022-11-18 20:45:18,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:18" (1/1) ... [2022-11-18 20:45:18,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:18" (1/1) ... [2022-11-18 20:45:18,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:18" (1/1) ... [2022-11-18 20:45:18,808 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:18" (1/1) ... [2022-11-18 20:45:18,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:18" (1/1) ... [2022-11-18 20:45:18,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:45:18,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:45:18,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:45:18,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:45:18,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:18" (1/1) ... [2022-11-18 20:45:18,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:45:18,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:18,899 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:45:18,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:45:18,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:45:18,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:45:19,562 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:45:19,565 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:45:22,347 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:45:22,355 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:45:22,356 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-18 20:45:22,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:45:22 BoogieIcfgContainer [2022-11-18 20:45:22,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:45:22,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:45:22,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:45:22,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:45:22,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:45:17" (1/3) ... [2022-11-18 20:45:22,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bc2f09b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:45:22, skipping insertion in model container [2022-11-18 20:45:22,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:18" (2/3) ... [2022-11-18 20:45:22,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bc2f09b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:45:22, skipping insertion in model container [2022-11-18 20:45:22,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:45:22" (3/3) ... [2022-11-18 20:45:22,369 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.fischer.2.prop1-back-serstep.c [2022-11-18 20:45:22,392 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:45:22,392 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:45:22,450 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:45:22,458 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@50b00060, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:45:22,458 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 20:45:22,463 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:45:22,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-18 20:45:22,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:22,472 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-18 20:45:22,473 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:45:22,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:22,480 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-18 20:45:22,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:45:22,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135081790] [2022-11-18 20:45:22,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:22,497 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:45:22,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:45:22,506 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:45:22,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-18 20:45:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:23,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 20:45:23,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:23,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:45:23,326 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:45:23,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [135081790] [2022-11-18 20:45:23,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [135081790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:45:23,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:45:23,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:45:23,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442406559] [2022-11-18 20:45:23,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:45:23,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:45:23,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:45:23,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:45:23,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:45:23,391 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:45:23,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:23,825 INFO L93 Difference]: Finished difference Result 20 states and 30 transitions. [2022-11-18 20:45:23,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:45:23,828 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-18 20:45:23,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:23,838 INFO L225 Difference]: With dead ends: 20 [2022-11-18 20:45:23,838 INFO L226 Difference]: Without dead ends: 11 [2022-11-18 20:45:23,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:45:23,846 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:23,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:45:23,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-18 20:45:23,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2022-11-18 20:45:23,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:45:23,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-11-18 20:45:23,886 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2022-11-18 20:45:23,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:23,887 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-11-18 20:45:23,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:45:23,887 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-11-18 20:45:23,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 20:45:23,888 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:23,888 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:23,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:24,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:45:24,104 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:45:24,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:24,104 INFO L85 PathProgramCache]: Analyzing trace with hash 271073635, now seen corresponding path program 1 times [2022-11-18 20:45:24,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:45:24,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1763733467] [2022-11-18 20:45:24,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:24,108 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:45:24,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:45:24,109 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:45:24,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef95d031-3975-46c8-919d-ea5a4bc2c204/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process