./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sep05-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sep05-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ac50477087b7e2b9c80860ad42d4d46d99ddf32e797cee205c21d5ff44f08ec3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 21:08:51,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:08:51,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:08:51,173 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:08:51,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:08:51,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:08:51,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:08:51,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:08:51,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:08:51,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:08:51,192 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:08:51,195 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:08:51,196 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:08:51,202 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:08:51,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:08:51,206 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:08:51,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:08:51,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:08:51,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:08:51,214 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:08:51,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:08:51,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:08:51,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:08:51,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:08:51,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:08:51,233 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:08:51,233 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:08:51,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:08:51,236 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:08:51,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:08:51,238 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:08:51,239 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:08:51,241 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:08:51,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:08:51,244 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:08:51,244 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:08:51,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:08:51,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:08:51,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:08:51,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:08:51,249 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:08:51,250 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 21:08:51,295 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:08:51,295 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:08:51,296 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:08:51,296 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:08:51,296 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:08:51,297 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:08:51,297 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:08:51,298 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:08:51,298 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:08:51,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:08:51,298 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 21:08:51,298 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:08:51,299 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 21:08:51,299 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:08:51,299 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:08:51,299 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:08:51,299 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:08:51,299 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 21:08:51,300 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:08:51,300 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:08:51,300 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:08:51,300 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:08:51,300 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:08:51,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:08:51,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:08:51,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:08:51,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:08:51,302 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:08:51,302 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:08:51,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:08:51,302 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:08:51,302 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:08:51,302 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:08:51,303 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_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac50477087b7e2b9c80860ad42d4d46d99ddf32e797cee205c21d5ff44f08ec3 [2022-11-02 21:08:51,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:08:51,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:08:51,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:08:51,607 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:08:51,608 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:08:51,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/reducercommutativity/sep05-1.i [2022-11-02 21:08:51,701 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/data/6b998def1/2f4cf36fffc44f4fa1d752a1c12b3d0b/FLAGc16f8b947 [2022-11-02 21:08:52,218 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:08:52,219 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/sv-benchmarks/c/reducercommutativity/sep05-1.i [2022-11-02 21:08:52,225 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/data/6b998def1/2f4cf36fffc44f4fa1d752a1c12b3d0b/FLAGc16f8b947 [2022-11-02 21:08:52,580 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/data/6b998def1/2f4cf36fffc44f4fa1d752a1c12b3d0b [2022-11-02 21:08:52,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:08:52,584 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:08:52,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:08:52,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:08:52,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:08:52,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:08:52" (1/1) ... [2022-11-02 21:08:52,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@509dc45e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:52, skipping insertion in model container [2022-11-02 21:08:52,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:08:52" (1/1) ... [2022-11-02 21:08:52,600 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:08:52,615 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:08:52,814 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/sv-benchmarks/c/reducercommutativity/sep05-1.i[1287,1300] [2022-11-02 21:08:52,817 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:08:52,825 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:08:52,845 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/sv-benchmarks/c/reducercommutativity/sep05-1.i[1287,1300] [2022-11-02 21:08:52,846 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:08:52,860 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:08:52,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:52 WrapperNode [2022-11-02 21:08:52,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:08:52,862 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:08:52,862 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:08:52,862 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:08:52,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:52" (1/1) ... [2022-11-02 21:08:52,877 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:52" (1/1) ... [2022-11-02 21:08:52,896 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-11-02 21:08:52,897 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:08:52,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:08:52,898 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:08:52,898 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:08:52,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:52" (1/1) ... [2022-11-02 21:08:52,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:52" (1/1) ... [2022-11-02 21:08:52,910 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:52" (1/1) ... [2022-11-02 21:08:52,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:52" (1/1) ... [2022-11-02 21:08:52,916 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:52" (1/1) ... [2022-11-02 21:08:52,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:52" (1/1) ... [2022-11-02 21:08:52,921 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:52" (1/1) ... [2022-11-02 21:08:52,922 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:52" (1/1) ... [2022-11-02 21:08:52,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:08:52,926 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:08:52,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:08:52,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:08:52,927 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:52" (1/1) ... [2022-11-02 21:08:52,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:08:52,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:52,971 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:08:52,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:08:53,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:08:53,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 21:08:53,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 21:08:53,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 21:08:53,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:08:53,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:08:53,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 21:08:53,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 21:08:53,028 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2022-11-02 21:08:53,029 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2022-11-02 21:08:53,135 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:08:53,137 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:08:53,292 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:08:53,300 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:08:53,301 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-02 21:08:53,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:08:53 BoogieIcfgContainer [2022-11-02 21:08:53,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:08:53,306 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:08:53,306 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:08:53,310 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:08:53,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:08:52" (1/3) ... [2022-11-02 21:08:53,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b33675 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:08:53, skipping insertion in model container [2022-11-02 21:08:53,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:52" (2/3) ... [2022-11-02 21:08:53,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b33675 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:08:53, skipping insertion in model container [2022-11-02 21:08:53,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:08:53" (3/3) ... [2022-11-02 21:08:53,313 INFO L112 eAbstractionObserver]: Analyzing ICFG sep05-1.i [2022-11-02 21:08:53,333 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:08:53,333 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 21:08:53,386 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:08:53,395 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;@73bfd845, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:08:53,396 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 21:08:53,401 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 21:08:53,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 21:08:53,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:53,414 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:53,415 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:53,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:53,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1312709850, now seen corresponding path program 1 times [2022-11-02 21:08:53,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:53,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808904485] [2022-11-02 21:08:53,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:53,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:53,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:53,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:08:53,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:53,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-02 21:08:53,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:53,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 21:08:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:53,865 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 21:08:53,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:53,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808904485] [2022-11-02 21:08:53,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808904485] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:53,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:08:53,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:08:53,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747789577] [2022-11-02 21:08:53,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:53,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:08:53,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:53,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:08:53,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:08:53,957 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:08:54,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:54,010 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2022-11-02 21:08:54,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:08:54,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-11-02 21:08:54,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:54,026 INFO L225 Difference]: With dead ends: 52 [2022-11-02 21:08:54,027 INFO L226 Difference]: Without dead ends: 25 [2022-11-02 21:08:54,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:08:54,039 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:54,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:08:54,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-02 21:08:54,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-11-02 21:08:54,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 21:08:54,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-11-02 21:08:54,099 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2022-11-02 21:08:54,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:54,100 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-11-02 21:08:54,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:08:54,102 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-11-02 21:08:54,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-02 21:08:54,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:54,106 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:54,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 21:08:54,109 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:54,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:54,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1845794557, now seen corresponding path program 1 times [2022-11-02 21:08:54,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:54,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672768084] [2022-11-02 21:08:54,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:54,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:54,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:08:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:54,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 21:08:54,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:54,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-02 21:08:54,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:54,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 21:08:54,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:54,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672768084] [2022-11-02 21:08:54,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672768084] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:54,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212383301] [2022-11-02 21:08:54,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:54,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:54,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:54,326 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:08:54,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 21:08:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:54,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 21:08:54,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:54,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:08:54,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:08:54,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212383301] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:54,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:08:54,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-02 21:08:54,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087541660] [2022-11-02 21:08:54,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:54,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:08:54,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:54,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:08:54,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:08:54,460 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:08:54,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:54,473 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-11-02 21:08:54,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:08:54,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-11-02 21:08:54,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:54,475 INFO L225 Difference]: With dead ends: 45 [2022-11-02 21:08:54,476 INFO L226 Difference]: Without dead ends: 27 [2022-11-02 21:08:54,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:08:54,478 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:54,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:08:54,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-02 21:08:54,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-11-02 21:08:54,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 21:08:54,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-11-02 21:08:54,486 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2022-11-02 21:08:54,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:54,486 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-11-02 21:08:54,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:08:54,487 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-11-02 21:08:54,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-02 21:08:54,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:54,488 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:54,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:54,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:54,713 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:54,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:54,714 INFO L85 PathProgramCache]: Analyzing trace with hash -701057785, now seen corresponding path program 1 times [2022-11-02 21:08:54,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:54,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104408911] [2022-11-02 21:08:54,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:54,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:54,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:08:54,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:54,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 21:08:54,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:54,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 21:08:54,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:54,931 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-02 21:08:54,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:54,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104408911] [2022-11-02 21:08:54,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104408911] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:54,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261926198] [2022-11-02 21:08:54,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:54,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:54,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:54,947 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:08:54,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 21:08:55,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:55,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 21:08:55,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-02 21:08:55,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:08:55,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261926198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:55,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:08:55,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-02 21:08:55,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053998234] [2022-11-02 21:08:55,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:55,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:08:55,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:55,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:08:55,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:08:55,085 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:08:55,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:55,099 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-11-02 21:08:55,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:08:55,100 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-11-02 21:08:55,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:55,101 INFO L225 Difference]: With dead ends: 41 [2022-11-02 21:08:55,101 INFO L226 Difference]: Without dead ends: 27 [2022-11-02 21:08:55,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:08:55,103 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:55,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:08:55,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-02 21:08:55,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-11-02 21:08:55,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 21:08:55,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-02 21:08:55,120 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 39 [2022-11-02 21:08:55,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:55,124 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-02 21:08:55,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:08:55,124 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-02 21:08:55,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 21:08:55,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:55,128 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:55,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:55,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:55,355 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:55,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:55,356 INFO L85 PathProgramCache]: Analyzing trace with hash -235909079, now seen corresponding path program 1 times [2022-11-02 21:08:55,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:55,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137491846] [2022-11-02 21:08:55,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:55,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:55,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:55,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:08:55,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:55,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 21:08:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:55,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-02 21:08:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:55,581 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 21:08:55,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:55,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137491846] [2022-11-02 21:08:55,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137491846] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:55,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643787161] [2022-11-02 21:08:55,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:55,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:55,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:55,593 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:08:55,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 21:08:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:55,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 21:08:55,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:55,746 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-02 21:08:55,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-02 21:08:55,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643787161] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:08:55,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:08:55,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-11-02 21:08:55,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149044174] [2022-11-02 21:08:55,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:08:55,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:08:55,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:55,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:08:55,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:08:55,805 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-02 21:08:55,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:55,885 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-11-02 21:08:55,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 21:08:55,890 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2022-11-02 21:08:55,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:55,891 INFO L225 Difference]: With dead ends: 58 [2022-11-02 21:08:55,891 INFO L226 Difference]: Without dead ends: 37 [2022-11-02 21:08:55,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:08:55,893 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:55,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 156 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:08:55,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-02 21:08:55,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-11-02 21:08:55,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 21:08:55,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-11-02 21:08:55,898 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 41 [2022-11-02 21:08:55,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:55,899 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-11-02 21:08:55,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-02 21:08:55,899 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-11-02 21:08:55,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-02 21:08:55,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:55,901 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:55,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:56,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:56,122 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:56,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:56,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1946429025, now seen corresponding path program 2 times [2022-11-02 21:08:56,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:56,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090631615] [2022-11-02 21:08:56,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:56,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:56,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-02 21:08:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:56,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-02 21:08:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:56,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-02 21:08:56,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:56,266 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-02 21:08:56,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:56,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090631615] [2022-11-02 21:08:56,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090631615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:56,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119498509] [2022-11-02 21:08:56,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:08:56,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:56,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:56,269 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:08:56,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 21:08:56,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:08:56,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:08:56,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 21:08:56,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:56,433 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-02 21:08:56,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:56,492 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-02 21:08:56,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119498509] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:08:56,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:08:56,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 9 [2022-11-02 21:08:56,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844350624] [2022-11-02 21:08:56,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:08:56,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:08:56,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:56,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:08:56,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:08:56,495 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 21:08:56,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:56,538 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2022-11-02 21:08:56,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:08:56,538 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2022-11-02 21:08:56,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:56,539 INFO L225 Difference]: With dead ends: 64 [2022-11-02 21:08:56,539 INFO L226 Difference]: Without dead ends: 40 [2022-11-02 21:08:56,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:08:56,541 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:56,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 111 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:08:56,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-02 21:08:56,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-11-02 21:08:56,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 21:08:56,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-11-02 21:08:56,548 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 56 [2022-11-02 21:08:56,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:56,549 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-11-02 21:08:56,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 21:08:56,549 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-11-02 21:08:56,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-02 21:08:56,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:56,551 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:56,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:56,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:56,772 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:56,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:56,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1253498369, now seen corresponding path program 3 times [2022-11-02 21:08:56,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:56,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078192170] [2022-11-02 21:08:56,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:56,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:56,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:56,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-02 21:08:56,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:56,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-02 21:08:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:56,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-02 21:08:56,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:56,974 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-02 21:08:56,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:56,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078192170] [2022-11-02 21:08:56,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078192170] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:56,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724726985] [2022-11-02 21:08:56,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:08:56,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:56,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:56,979 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:08:57,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 21:08:57,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 21:08:57,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:08:57,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:08:57,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:57,141 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-02 21:08:57,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:57,212 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-02 21:08:57,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724726985] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:08:57,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:08:57,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-11-02 21:08:57,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299640088] [2022-11-02 21:08:57,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:08:57,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:08:57,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:57,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:08:57,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:08:57,221 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 21:08:57,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:57,272 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2022-11-02 21:08:57,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:08:57,274 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 60 [2022-11-02 21:08:57,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:57,278 INFO L225 Difference]: With dead ends: 73 [2022-11-02 21:08:57,278 INFO L226 Difference]: Without dead ends: 48 [2022-11-02 21:08:57,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:08:57,281 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 17 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:57,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 100 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:08:57,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-02 21:08:57,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-02 21:08:57,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 21:08:57,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-11-02 21:08:57,302 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 60 [2022-11-02 21:08:57,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:57,303 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-11-02 21:08:57,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 21:08:57,304 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-11-02 21:08:57,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-02 21:08:57,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:57,306 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:57,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:57,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:57,523 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:57,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:57,523 INFO L85 PathProgramCache]: Analyzing trace with hash -156103101, now seen corresponding path program 4 times [2022-11-02 21:08:57,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:57,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946799555] [2022-11-02 21:08:57,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:57,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:57,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-02 21:08:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:57,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-02 21:08:57,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:57,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-02 21:08:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-11-02 21:08:57,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:57,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946799555] [2022-11-02 21:08:57,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946799555] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:57,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139753690] [2022-11-02 21:08:57,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 21:08:57,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:57,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:57,723 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:08:57,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 21:08:57,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 21:08:57,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:08:57,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:08:57,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 180 proven. 4 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-02 21:08:57,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:57,963 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-11-02 21:08:57,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139753690] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:08:57,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:08:57,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-11-02 21:08:57,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438197953] [2022-11-02 21:08:57,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:08:57,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:08:57,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:57,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:08:57,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:08:57,967 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 21:08:58,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:58,012 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2022-11-02 21:08:58,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:08:58,013 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 87 [2022-11-02 21:08:58,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:58,014 INFO L225 Difference]: With dead ends: 78 [2022-11-02 21:08:58,014 INFO L226 Difference]: Without dead ends: 52 [2022-11-02 21:08:58,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 176 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:08:58,018 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:58,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 95 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:08:58,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-02 21:08:58,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-02 21:08:58,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 21:08:58,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2022-11-02 21:08:58,025 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 87 [2022-11-02 21:08:58,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:58,025 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2022-11-02 21:08:58,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 21:08:58,026 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2022-11-02 21:08:58,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-02 21:08:58,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:58,033 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:58,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:58,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:58,234 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:58,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:58,235 INFO L85 PathProgramCache]: Analyzing trace with hash 2081062919, now seen corresponding path program 5 times [2022-11-02 21:08:58,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:58,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465121163] [2022-11-02 21:08:58,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:58,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:58,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:59,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-02 21:08:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:00,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-02 21:09:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:00,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-02 21:09:00,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:00,667 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-02 21:09:00,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:00,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465121163] [2022-11-02 21:09:00,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465121163] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:00,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960209666] [2022-11-02 21:09:00,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 21:09:00,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:00,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:09:00,669 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:09:00,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 21:09:01,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-11-02 21:09:01,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:09:01,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-02 21:09:01,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:01,800 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-02 21:09:01,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:02,639 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 4 proven. 315 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-02 21:09:02,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960209666] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:09:02,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:09:02,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 25 [2022-11-02 21:09:02,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438729099] [2022-11-02 21:09:02,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:02,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-02 21:09:02,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:02,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-02 21:09:02,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2022-11-02 21:09:02,642 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 25 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 20 states have internal predecessors, (56), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-02 21:09:03,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:03,057 INFO L93 Difference]: Finished difference Result 147 states and 205 transitions. [2022-11-02 21:09:03,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 21:09:03,058 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 20 states have internal predecessors, (56), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 91 [2022-11-02 21:09:03,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:03,062 INFO L225 Difference]: With dead ends: 147 [2022-11-02 21:09:03,062 INFO L226 Difference]: Without dead ends: 143 [2022-11-02 21:09:03,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 176 SyntacticMatches, 13 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-11-02 21:09:03,063 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 47 mSDsluCounter, 1139 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:03,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 1215 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 21:09:03,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-02 21:09:03,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 108. [2022-11-02 21:09:03,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 100 states have (on average 1.26) internal successors, (126), 101 states have internal predecessors, (126), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-02 21:09:03,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 140 transitions. [2022-11-02 21:09:03,091 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 140 transitions. Word has length 91 [2022-11-02 21:09:03,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:03,092 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 140 transitions. [2022-11-02 21:09:03,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 20 states have internal predecessors, (56), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-02 21:09:03,092 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 140 transitions. [2022-11-02 21:09:03,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-02 21:09:03,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:03,094 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:03,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:03,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-02 21:09:03,318 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:09:03,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:03,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1533846007, now seen corresponding path program 1 times [2022-11-02 21:09:03,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:03,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182566154] [2022-11-02 21:09:03,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:03,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:03,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:05,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-02 21:09:05,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:05,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-02 21:09:05,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:05,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-02 21:09:05,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:06,223 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 178 proven. 171 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-02 21:09:06,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:06,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182566154] [2022-11-02 21:09:06,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182566154] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:06,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825787411] [2022-11-02 21:09:06,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:06,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:06,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:09:06,226 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:09:06,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 21:09:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:06,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-02 21:09:06,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:06,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-02 21:09:06,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-02 21:09:07,296 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 181 proven. 132 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-11-02 21:09:07,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:08,175 INFO L356 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2022-11-02 21:09:08,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 28 [2022-11-02 21:09:08,238 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 191 proven. 120 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-02 21:09:08,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825787411] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:09:08,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:09:08,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 15] total 42 [2022-11-02 21:09:08,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394430432] [2022-11-02 21:09:08,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:08,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-02 21:09:08,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:08,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-02 21:09:08,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1572, Unknown=0, NotChecked=0, Total=1722 [2022-11-02 21:09:08,241 INFO L87 Difference]: Start difference. First operand 108 states and 140 transitions. Second operand has 42 states, 40 states have (on average 2.825) internal successors, (113), 39 states have internal predecessors, (113), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-02 21:09:10,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:10,084 INFO L93 Difference]: Finished difference Result 262 states and 365 transitions. [2022-11-02 21:09:10,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-02 21:09:10,085 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 2.825) internal successors, (113), 39 states have internal predecessors, (113), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 91 [2022-11-02 21:09:10,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:10,088 INFO L225 Difference]: With dead ends: 262 [2022-11-02 21:09:10,088 INFO L226 Difference]: Without dead ends: 228 [2022-11-02 21:09:10,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 178 SyntacticMatches, 8 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=375, Invalid=3531, Unknown=0, NotChecked=0, Total=3906 [2022-11-02 21:09:10,091 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 167 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 347 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:10,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 538 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 873 Invalid, 0 Unknown, 347 Unchecked, 0.9s Time] [2022-11-02 21:09:10,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-11-02 21:09:10,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 202. [2022-11-02 21:09:10,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 189 states have (on average 1.306878306878307) internal successors, (247), 193 states have internal predecessors, (247), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2022-11-02 21:09:10,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 282 transitions. [2022-11-02 21:09:10,133 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 282 transitions. Word has length 91 [2022-11-02 21:09:10,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:10,134 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 282 transitions. [2022-11-02 21:09:10,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 2.825) internal successors, (113), 39 states have internal predecessors, (113), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-02 21:09:10,134 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 282 transitions. [2022-11-02 21:09:10,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-02 21:09:10,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:10,137 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:10,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:10,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:10,363 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:09:10,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:10,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1955738939, now seen corresponding path program 2 times [2022-11-02 21:09:10,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:10,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966645998] [2022-11-02 21:09:10,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:10,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:12,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-02 21:09:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:13,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-02 21:09:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:13,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-02 21:09:13,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 91 proven. 277 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-02 21:09:13,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:13,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966645998] [2022-11-02 21:09:13,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966645998] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:13,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902794724] [2022-11-02 21:09:13,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:09:13,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:13,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:09:13,849 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:09:13,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 21:09:14,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:09:14,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:09:14,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-02 21:09:14,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:14,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:09:14,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:09:14,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 33 [2022-11-02 21:09:14,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:09:14,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-02 21:09:14,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:09:14,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-02 21:09:14,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:09:14,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-11-02 21:09:14,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2022-11-02 21:09:14,680 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 21:09:14,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 29 [2022-11-02 21:09:15,280 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 12 proven. 366 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-02 21:09:15,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:26,473 INFO L356 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-11-02 21:09:26,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 30 [2022-11-02 21:09:26,843 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 107 proven. 244 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-02 21:09:26,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902794724] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:09:26,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:09:26,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 24] total 59 [2022-11-02 21:09:26,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669741644] [2022-11-02 21:09:26,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:26,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-02 21:09:26,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:26,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-02 21:09:26,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=3173, Unknown=10, NotChecked=0, Total=3422 [2022-11-02 21:09:26,846 INFO L87 Difference]: Start difference. First operand 202 states and 282 transitions. Second operand has 59 states, 59 states have (on average 2.440677966101695) internal successors, (144), 58 states have internal predecessors, (144), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-02 21:09:31,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:09:31,604 INFO L93 Difference]: Finished difference Result 723 states and 1047 transitions. [2022-11-02 21:09:31,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-02 21:09:31,606 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.440677966101695) internal successors, (144), 58 states have internal predecessors, (144), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 91 [2022-11-02 21:09:31,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:09:31,610 INFO L225 Difference]: With dead ends: 723 [2022-11-02 21:09:31,610 INFO L226 Difference]: Without dead ends: 515 [2022-11-02 21:09:31,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 172 SyntacticMatches, 15 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2781 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=704, Invalid=8216, Unknown=10, NotChecked=0, Total=8930 [2022-11-02 21:09:31,616 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 186 mSDsluCounter, 1389 mSDsCounter, 0 mSdLazyCounter, 1787 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 3000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1101 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:09:31,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 1445 Invalid, 3000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1787 Invalid, 0 Unknown, 1101 Unchecked, 1.6s Time] [2022-11-02 21:09:31,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-11-02 21:09:31,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 440. [2022-11-02 21:09:31,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 413 states have (on average 1.3171912832929782) internal successors, (544), 423 states have internal predecessors, (544), 11 states have call successors, (11), 5 states have call predecessors, (11), 15 states have return successors, (93), 11 states have call predecessors, (93), 11 states have call successors, (93) [2022-11-02 21:09:31,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 648 transitions. [2022-11-02 21:09:31,712 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 648 transitions. Word has length 91 [2022-11-02 21:09:31,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:09:31,712 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 648 transitions. [2022-11-02 21:09:31,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.440677966101695) internal successors, (144), 58 states have internal predecessors, (144), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-02 21:09:31,713 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 648 transitions. [2022-11-02 21:09:31,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-02 21:09:31,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:09:31,717 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:09:31,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:31,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 21:09:31,943 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:09:31,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:31,943 INFO L85 PathProgramCache]: Analyzing trace with hash 801199241, now seen corresponding path program 3 times [2022-11-02 21:09:31,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:31,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158723428] [2022-11-02 21:09:31,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:31,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:33,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-02 21:09:33,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:33,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-02 21:09:33,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:34,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-02 21:09:34,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:34,684 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 180 proven. 190 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-02 21:09:34,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:34,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158723428] [2022-11-02 21:09:34,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158723428] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:34,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568043677] [2022-11-02 21:09:34,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:09:34,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:34,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:09:34,686 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:09:34,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 21:09:35,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-02 21:09:35,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:09:35,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-02 21:09:35,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:35,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-02 21:09:35,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-02 21:09:35,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:09:35,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-02 21:09:37,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:09:37,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2022-11-02 21:09:37,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:09:37,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-11-02 21:09:37,377 INFO L356 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2022-11-02 21:09:37,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 46 [2022-11-02 21:09:37,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:09:37,625 INFO L356 Elim1Store]: treesize reduction 16, result has 63.6 percent of original size [2022-11-02 21:09:37,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 63 treesize of output 73 [2022-11-02 21:09:37,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 26 [2022-11-02 21:09:40,963 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 214 proven. 137 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-02 21:09:40,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:41,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568043677] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:41,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:09:41,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30] total 50 [2022-11-02 21:09:41,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533113997] [2022-11-02 21:09:41,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:41,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-02 21:09:41,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:41,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-02 21:09:41,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2367, Unknown=1, NotChecked=0, Total=2550 [2022-11-02 21:09:41,123 INFO L87 Difference]: Start difference. First operand 440 states and 648 transitions. Second operand has 50 states, 50 states have (on average 2.2) internal successors, (110), 49 states have internal predecessors, (110), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 21:10:15,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:10:15,539 INFO L93 Difference]: Finished difference Result 2000 states and 3259 transitions. [2022-11-02 21:10:15,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2022-11-02 21:10:15,539 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.2) internal successors, (110), 49 states have internal predecessors, (110), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 91 [2022-11-02 21:10:15,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:10:15,565 INFO L225 Difference]: With dead ends: 2000 [2022-11-02 21:10:15,566 INFO L226 Difference]: Without dead ends: 1646 [2022-11-02 21:10:15,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 93 SyntacticMatches, 6 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17097 ImplicationChecksByTransitivity, 38.6s TimeCoverageRelationStatistics Valid=2912, Invalid=40958, Unknown=20, NotChecked=0, Total=43890 [2022-11-02 21:10:15,590 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 34 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 2182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1185 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 21:10:15,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 244 Invalid, 2182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 915 Invalid, 0 Unknown, 1185 Unchecked, 0.9s Time] [2022-11-02 21:10:15,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2022-11-02 21:10:15,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1256. [2022-11-02 21:10:15,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 1201 states have (on average 1.3871773522064945) internal successors, (1666), 1229 states have internal predecessors, (1666), 17 states have call successors, (17), 9 states have call predecessors, (17), 37 states have return successors, (294), 17 states have call predecessors, (294), 17 states have call successors, (294) [2022-11-02 21:10:15,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1977 transitions. [2022-11-02 21:10:15,980 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1977 transitions. Word has length 91 [2022-11-02 21:10:15,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:10:15,981 INFO L495 AbstractCegarLoop]: Abstraction has 1256 states and 1977 transitions. [2022-11-02 21:10:15,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.2) internal successors, (110), 49 states have internal predecessors, (110), 2 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 21:10:15,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1977 transitions. [2022-11-02 21:10:15,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-02 21:10:15,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:10:15,992 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:10:16,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 21:10:16,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:10:16,215 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:10:16,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:10:16,215 INFO L85 PathProgramCache]: Analyzing trace with hash 86918213, now seen corresponding path program 4 times [2022-11-02 21:10:16,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:10:16,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736211944] [2022-11-02 21:10:16,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:10:16,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:10:16,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:10:18,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-02 21:10:18,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:10:19,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-02 21:10:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:10:19,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-02 21:10:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:10:19,704 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 91 proven. 277 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-02 21:10:19,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:10:19,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736211944] [2022-11-02 21:10:19,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736211944] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:10:19,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534734403] [2022-11-02 21:10:19,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 21:10:19,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:10:19,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:10:19,707 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:10:19,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 21:10:19,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 21:10:19,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:10:19,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-02 21:10:19,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:10:20,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:10:20,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:10:20,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2022-11-02 21:10:20,894 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-02 21:10:20,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 34 [2022-11-02 21:10:21,103 INFO L356 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2022-11-02 21:10:21,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 58 [2022-11-02 21:10:21,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:10:21,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 21:10:21,583 INFO L356 Elim1Store]: treesize reduction 210, result has 47.2 percent of original size [2022-11-02 21:10:21,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 131 treesize of output 245 [2022-11-02 21:10:23,556 INFO L356 Elim1Store]: treesize reduction 43, result has 25.9 percent of original size [2022-11-02 21:10:23,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 55 [2022-11-02 21:10:23,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 26 [2022-11-02 21:10:24,033 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 6 proven. 382 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-02 21:10:24,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:00,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534734403] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:00,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:11:00,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 33] total 52 [2022-11-02 21:11:00,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823905313] [2022-11-02 21:11:00,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:00,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-02 21:11:00,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:00,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-02 21:11:00,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=3709, Unknown=16, NotChecked=0, Total=4032 [2022-11-02 21:11:00,944 INFO L87 Difference]: Start difference. First operand 1256 states and 1977 transitions. Second operand has 52 states, 52 states have (on average 2.3846153846153846) internal successors, (124), 51 states have internal predecessors, (124), 3 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-02 21:11:10,023 WARN L234 SmtUtils]: Spent 6.62s on a formula simplification. DAG size of input: 68 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 21:11:13,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:13,656 INFO L93 Difference]: Finished difference Result 2999 states and 5136 transitions. [2022-11-02 21:11:13,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-02 21:11:13,656 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.3846153846153846) internal successors, (124), 51 states have internal predecessors, (124), 3 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 91 [2022-11-02 21:11:13,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:13,677 INFO L225 Difference]: With dead ends: 2999 [2022-11-02 21:11:13,677 INFO L226 Difference]: Without dead ends: 2469 [2022-11-02 21:11:13,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 108 SyntacticMatches, 8 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3489 ImplicationChecksByTransitivity, 50.3s TimeCoverageRelationStatistics Valid=791, Invalid=9293, Unknown=16, NotChecked=0, Total=10100 [2022-11-02 21:11:13,687 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 53 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 782 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:13,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 537 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 686 Invalid, 0 Unknown, 782 Unchecked, 0.5s Time] [2022-11-02 21:11:13,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2022-11-02 21:11:14,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 2415. [2022-11-02 21:11:14,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2415 states, 2295 states have (on average 1.4047930283224401) internal successors, (3224), 2362 states have internal predecessors, (3224), 33 states have call successors, (33), 19 states have call predecessors, (33), 86 states have return successors, (902), 33 states have call predecessors, (902), 33 states have call successors, (902) [2022-11-02 21:11:14,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2415 states to 2415 states and 4159 transitions. [2022-11-02 21:11:14,304 INFO L78 Accepts]: Start accepts. Automaton has 2415 states and 4159 transitions. Word has length 91 [2022-11-02 21:11:14,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:14,304 INFO L495 AbstractCegarLoop]: Abstraction has 2415 states and 4159 transitions. [2022-11-02 21:11:14,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.3846153846153846) internal successors, (124), 51 states have internal predecessors, (124), 3 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-02 21:11:14,305 INFO L276 IsEmpty]: Start isEmpty. Operand 2415 states and 4159 transitions. [2022-11-02 21:11:14,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-02 21:11:14,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:14,329 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:11:14,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:14,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 21:11:14,543 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:14,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:14,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1791202551, now seen corresponding path program 5 times [2022-11-02 21:11:14,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:14,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378689807] [2022-11-02 21:11:14,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:14,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:14,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:16,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-02 21:11:16,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:16,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-02 21:11:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:16,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-02 21:11:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:16,796 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 180 proven. 172 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-02 21:11:16,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:16,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378689807] [2022-11-02 21:11:16,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378689807] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:16,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319495774] [2022-11-02 21:11:16,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 21:11:16,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:16,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:16,799 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:11:16,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 21:11:17,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-11-02 21:11:17,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:11:17,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-02 21:11:17,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:17,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:11:17,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-02 21:11:17,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 31 [2022-11-02 21:11:17,560 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 21:11:17,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 34 [2022-11-02 21:11:17,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:11:17,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2022-11-02 21:11:17,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:11:17,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2022-11-02 21:11:17,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:11:17,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-11-02 21:11:18,435 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 186 proven. 154 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-02 21:11:18,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:18,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319495774] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:18,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:11:18,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 37 [2022-11-02 21:11:18,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684398408] [2022-11-02 21:11:18,582 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:18,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-02 21:11:18,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:18,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-02 21:11:18,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1254, Unknown=0, NotChecked=0, Total=1406 [2022-11-02 21:11:18,583 INFO L87 Difference]: Start difference. First operand 2415 states and 4159 transitions. Second operand has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 35 states have internal predecessors, (89), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 21:11:21,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:21,854 INFO L93 Difference]: Finished difference Result 4823 states and 8519 transitions. [2022-11-02 21:11:21,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-02 21:11:21,855 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 35 states have internal predecessors, (89), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 91 [2022-11-02 21:11:21,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:21,886 INFO L225 Difference]: With dead ends: 4823 [2022-11-02 21:11:21,887 INFO L226 Difference]: Without dead ends: 2860 [2022-11-02 21:11:21,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 89 SyntacticMatches, 10 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1844 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=543, Invalid=4569, Unknown=0, NotChecked=0, Total=5112 [2022-11-02 21:11:21,907 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 88 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 1452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 717 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:21,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 435 Invalid, 1452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 702 Invalid, 0 Unknown, 717 Unchecked, 0.6s Time] [2022-11-02 21:11:21,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2022-11-02 21:11:22,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 2802. [2022-11-02 21:11:22,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2802 states, 2651 states have (on average 1.3658996605054696) internal successors, (3621), 2705 states have internal predecessors, (3621), 61 states have call successors, (61), 35 states have call predecessors, (61), 89 states have return successors, (1280), 61 states have call predecessors, (1280), 61 states have call successors, (1280) [2022-11-02 21:11:22,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 4962 transitions. [2022-11-02 21:11:22,650 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 4962 transitions. Word has length 91 [2022-11-02 21:11:22,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:22,650 INFO L495 AbstractCegarLoop]: Abstraction has 2802 states and 4962 transitions. [2022-11-02 21:11:22,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 35 states have internal predecessors, (89), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 21:11:22,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 4962 transitions. [2022-11-02 21:11:22,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-02 21:11:22,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:22,705 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:11:22,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:22,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 21:11:22,906 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:22,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:22,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1790257655, now seen corresponding path program 6 times [2022-11-02 21:11:22,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:22,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426128148] [2022-11-02 21:11:22,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:22,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:23,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:24,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-02 21:11:24,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:24,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-02 21:11:24,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:24,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-02 21:11:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:24,643 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 348 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-02 21:11:24,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:24,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426128148] [2022-11-02 21:11:24,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426128148] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:24,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15699267] [2022-11-02 21:11:24,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 21:11:24,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:24,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:24,647 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:11:24,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 21:11:24,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-02 21:11:24,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:11:24,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-02 21:11:24,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:24,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-02 21:11:25,193 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 36 [2022-11-02 21:11:29,971 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 248 proven. 57 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-11-02 21:11:29,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:31,241 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 293 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-11-02 21:11:31,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15699267] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:11:31,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:11:31,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 13] total 38 [2022-11-02 21:11:31,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804662084] [2022-11-02 21:11:31,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:31,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-02 21:11:31,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:31,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-02 21:11:31,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1219, Unknown=2, NotChecked=0, Total=1406 [2022-11-02 21:11:31,244 INFO L87 Difference]: Start difference. First operand 2802 states and 4962 transitions. Second operand has 38 states, 38 states have (on average 2.6842105263157894) internal successors, (102), 37 states have internal predecessors, (102), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-02 21:12:35,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:12:35,135 INFO L93 Difference]: Finished difference Result 6263 states and 11621 transitions. [2022-11-02 21:12:35,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-02 21:12:35,136 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.6842105263157894) internal successors, (102), 37 states have internal predecessors, (102), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 91 [2022-11-02 21:12:35,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:12:35,188 INFO L225 Difference]: With dead ends: 6263 [2022-11-02 21:12:35,189 INFO L226 Difference]: Without dead ends: 4843 [2022-11-02 21:12:35,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 177 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 67.9s TimeCoverageRelationStatistics Valid=1084, Invalid=6026, Unknown=30, NotChecked=0, Total=7140 [2022-11-02 21:12:35,216 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 90 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 379 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 21:12:35,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 250 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 775 Invalid, 0 Unknown, 379 Unchecked, 0.7s Time] [2022-11-02 21:12:35,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4843 states. [2022-11-02 21:12:36,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4843 to 3432. [2022-11-02 21:12:36,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3432 states, 3226 states have (on average 1.374457532548047) internal successors, (4434), 3326 states have internal predecessors, (4434), 68 states have call successors, (68), 37 states have call predecessors, (68), 137 states have return successors, (2360), 68 states have call predecessors, (2360), 68 states have call successors, (2360) [2022-11-02 21:12:36,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3432 states to 3432 states and 6862 transitions. [2022-11-02 21:12:36,461 INFO L78 Accepts]: Start accepts. Automaton has 3432 states and 6862 transitions. Word has length 91 [2022-11-02 21:12:36,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:12:36,461 INFO L495 AbstractCegarLoop]: Abstraction has 3432 states and 6862 transitions. [2022-11-02 21:12:36,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.6842105263157894) internal successors, (102), 37 states have internal predecessors, (102), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-02 21:12:36,462 INFO L276 IsEmpty]: Start isEmpty. Operand 3432 states and 6862 transitions. [2022-11-02 21:12:36,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-02 21:12:36,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:12:36,532 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:12:36,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 21:12:36,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 21:12:36,759 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:12:36,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:12:36,759 INFO L85 PathProgramCache]: Analyzing trace with hash 31675077, now seen corresponding path program 7 times [2022-11-02 21:12:36,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:12:36,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507682754] [2022-11-02 21:12:36,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:12:36,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:12:36,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:37,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-02 21:12:37,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:38,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-02 21:12:38,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:38,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-02 21:12:38,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:38,580 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-02 21:12:38,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:12:38,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507682754] [2022-11-02 21:12:38,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507682754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:12:38,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601910700] [2022-11-02 21:12:38,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 21:12:38,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:12:38,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:12:38,587 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:12:38,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72f70edf-1c1b-4721-ba33-8dfd487c2f67/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 21:12:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:38,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-02 21:12:38,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:12:39,103 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-02 21:12:39,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2022-11-02 21:12:39,177 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-02 21:12:39,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 32 [2022-11-02 21:12:39,251 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-11-02 21:12:39,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 44 [2022-11-02 21:12:39,402 INFO L356 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2022-11-02 21:12:39,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 50 [2022-11-02 21:12:39,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 30