./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62015ba3-5a96-40cc-9d1b-a515761256eb/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62015ba3-5a96-40cc-9d1b-a515761256eb/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62015ba3-5a96-40cc-9d1b-a515761256eb/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62015ba3-5a96-40cc-9d1b-a515761256eb/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62015ba3-5a96-40cc-9d1b-a515761256eb/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62015ba3-5a96-40cc-9d1b-a515761256eb/bin/uautomizer-DrprNOufMa --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 6a855777f33fc48d84c4a45a2798e39789fc84161980bcc62efd5879691878c1 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 20:51:48,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 20:51:48,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 20:51:48,288 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 20:51:48,289 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 20:51:48,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 20:51:48,291 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 20:51:48,293 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 20:51:48,294 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 20:51:48,295 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 20:51:48,296 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 20:51:48,297 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 20:51:48,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 20:51:48,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 20:51:48,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 20:51:48,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 20:51:48,301 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 20:51:48,302 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 20:51:48,304 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 20:51:48,306 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 20:51:48,308 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 20:51:48,309 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 20:51:48,310 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 20:51:48,311 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 20:51:48,313 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 20:51:48,314 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 20:51:48,314 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 20:51:48,315 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 20:51:48,315 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 20:51:48,316 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 20:51:48,316 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 20:51:48,317 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 20:51:48,318 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 20:51:48,318 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 20:51:48,319 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 20:51:48,319 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 20:51:48,320 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 20:51:48,320 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 20:51:48,320 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 20:51:48,321 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 20:51:48,321 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 20:51:48,322 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62015ba3-5a96-40cc-9d1b-a515761256eb/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 20:51:48,340 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 20:51:48,340 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 20:51:48,340 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 20:51:48,340 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 20:51:48,341 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 20:51:48,341 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 20:51:48,341 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 20:51:48,341 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 20:51:48,341 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 20:51:48,342 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 20:51:48,342 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 20:51:48,342 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 20:51:48,342 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 20:51:48,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 20:51:48,342 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 20:51:48,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 20:51:48,342 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 20:51:48,342 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 20:51:48,343 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 20:51:48,343 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 20:51:48,343 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 20:51:48,343 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 20:51:48,343 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 20:51:48,343 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 20:51:48,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:51:48,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 20:51:48,344 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 20:51:48,344 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 20:51:48,344 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 20:51:48,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 20:51:48,344 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 20:51:48,344 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 20:51:48,344 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 20:51:48,345 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 20:51:48,345 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_62015ba3-5a96-40cc-9d1b-a515761256eb/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62015ba3-5a96-40cc-9d1b-a515761256eb/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6a855777f33fc48d84c4a45a2798e39789fc84161980bcc62efd5879691878c1 [2021-12-06 20:51:48,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 20:51:48,549 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 20:51:48,552 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 20:51:48,553 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 20:51:48,553 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 20:51:48,554 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62015ba3-5a96-40cc-9d1b-a515761256eb/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-06 20:51:48,601 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62015ba3-5a96-40cc-9d1b-a515761256eb/bin/uautomizer-DrprNOufMa/data/fe67d4b19/46b0dd9654584890beb112376445f4d0/FLAG1a4c88a92 [2021-12-06 20:51:48,981 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 20:51:48,982 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62015ba3-5a96-40cc-9d1b-a515761256eb/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-06 20:51:48,990 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62015ba3-5a96-40cc-9d1b-a515761256eb/bin/uautomizer-DrprNOufMa/data/fe67d4b19/46b0dd9654584890beb112376445f4d0/FLAG1a4c88a92 [2021-12-06 20:51:49,000 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62015ba3-5a96-40cc-9d1b-a515761256eb/bin/uautomizer-DrprNOufMa/data/fe67d4b19/46b0dd9654584890beb112376445f4d0 [2021-12-06 20:51:49,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 20:51:49,003 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 20:51:49,004 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 20:51:49,004 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 20:51:49,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 20:51:49,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:51:49" (1/1) ... [2021-12-06 20:51:49,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a2bf90a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:51:49, skipping insertion in model container [2021-12-06 20:51:49,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:51:49" (1/1) ... [2021-12-06 20:51:49,013 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 20:51:49,046 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:51:49,215 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_62015ba3-5a96-40cc-9d1b-a515761256eb/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7401,7414] [2021-12-06 20:51:49,247 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:51:49,257 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 20:51:49,295 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_62015ba3-5a96-40cc-9d1b-a515761256eb/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7401,7414] [2021-12-06 20:51:49,320 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:51:49,334 INFO L208 MainTranslator]: Completed translation [2021-12-06 20:51:49,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:51:49 WrapperNode [2021-12-06 20:51:49,335 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 20:51:49,336 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 20:51:49,336 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 20:51:49,336 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 20:51:49,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:51:49" (1/1) ... [2021-12-06 20:51:49,354 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:51:49" (1/1) ... [2021-12-06 20:51:49,384 INFO L137 Inliner]: procedures = 26, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 620 [2021-12-06 20:51:49,384 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 20:51:49,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 20:51:49,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 20:51:49,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 20:51:49,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:51:49" (1/1) ... [2021-12-06 20:51:49,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:51:49" (1/1) ... [2021-12-06 20:51:49,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:51:49" (1/1) ... [2021-12-06 20:51:49,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:51:49" (1/1) ... [2021-12-06 20:51:49,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:51:49" (1/1) ... [2021-12-06 20:51:49,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:51:49" (1/1) ... [2021-12-06 20:51:49,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:51:49" (1/1) ... [2021-12-06 20:51:49,412 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 20:51:49,413 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 20:51:49,413 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 20:51:49,413 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 20:51:49,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:51:49" (1/1) ... [2021-12-06 20:51:49,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:51:49,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62015ba3-5a96-40cc-9d1b-a515761256eb/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:51:49,440 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62015ba3-5a96-40cc-9d1b-a515761256eb/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 20:51:49,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62015ba3-5a96-40cc-9d1b-a515761256eb/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 20:51:49,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 20:51:49,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 20:51:49,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 20:51:49,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 20:51:49,579 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 20:51:49,580 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 20:51:49,964 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 20:51:49,973 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 20:51:49,973 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-06 20:51:49,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:51:49 BoogieIcfgContainer [2021-12-06 20:51:49,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 20:51:49,977 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 20:51:49,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 20:51:49,980 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 20:51:49,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 08:51:49" (1/3) ... [2021-12-06 20:51:49,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cc411a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:51:49, skipping insertion in model container [2021-12-06 20:51:49,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:51:49" (2/3) ... [2021-12-06 20:51:49,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cc411a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:51:49, skipping insertion in model container [2021-12-06 20:51:49,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:51:49" (3/3) ... [2021-12-06 20:51:49,983 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-06 20:51:49,988 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 20:51:49,989 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 20:51:50,042 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 20:51:50,048 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 20:51:50,048 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 20:51:50,066 INFO L276 IsEmpty]: Start isEmpty. Operand has 165 states, 163 states have (on average 1.6993865030674846) internal successors, (277), 164 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:50,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-06 20:51:50,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:51:50,074 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:51:50,075 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:51:50,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:51:50,079 INFO L85 PathProgramCache]: Analyzing trace with hash 2011282842, now seen corresponding path program 1 times [2021-12-06 20:51:50,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:51:50,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147021672] [2021-12-06 20:51:50,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:51:50,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:51:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:51:50,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:51:50,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:51:50,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147021672] [2021-12-06 20:51:50,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147021672] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:51:50,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:51:50,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:51:50,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399051783] [2021-12-06 20:51:50,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:51:50,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:51:50,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:51:50,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:51:50,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:51:50,332 INFO L87 Difference]: Start difference. First operand has 165 states, 163 states have (on average 1.6993865030674846) internal successors, (277), 164 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:50,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:51:50,388 INFO L93 Difference]: Finished difference Result 391 states and 633 transitions. [2021-12-06 20:51:50,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:51:50,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-06 20:51:50,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:51:50,399 INFO L225 Difference]: With dead ends: 391 [2021-12-06 20:51:50,399 INFO L226 Difference]: Without dead ends: 264 [2021-12-06 20:51:50,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:51:50,405 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 205 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:51:50,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 592 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:51:50,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-12-06 20:51:50,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 262. [2021-12-06 20:51:50,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.5019157088122606) internal successors, (392), 261 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:50,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 392 transitions. [2021-12-06 20:51:50,449 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 392 transitions. Word has length 74 [2021-12-06 20:51:50,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:51:50,449 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 392 transitions. [2021-12-06 20:51:50,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:50,450 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 392 transitions. [2021-12-06 20:51:50,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 20:51:50,452 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:51:50,453 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:51:50,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 20:51:50,453 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:51:50,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:51:50,454 INFO L85 PathProgramCache]: Analyzing trace with hash -141824057, now seen corresponding path program 1 times [2021-12-06 20:51:50,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:51:50,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967213073] [2021-12-06 20:51:50,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:51:50,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:51:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:51:50,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:51:50,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:51:50,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967213073] [2021-12-06 20:51:50,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967213073] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:51:50,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:51:50,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:51:50,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733527392] [2021-12-06 20:51:50,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:51:50,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:51:50,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:51:50,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:51:50,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:51:50,545 INFO L87 Difference]: Start difference. First operand 262 states and 392 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:50,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:51:50,579 INFO L93 Difference]: Finished difference Result 666 states and 1036 transitions. [2021-12-06 20:51:50,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:51:50,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-06 20:51:50,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:51:50,582 INFO L225 Difference]: With dead ends: 666 [2021-12-06 20:51:50,583 INFO L226 Difference]: Without dead ends: 448 [2021-12-06 20:51:50,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:51:50,585 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 166 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:51:50,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 520 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:51:50,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-12-06 20:51:50,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 446. [2021-12-06 20:51:50,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.5393258426966292) internal successors, (685), 445 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:50,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 685 transitions. [2021-12-06 20:51:50,615 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 685 transitions. Word has length 75 [2021-12-06 20:51:50,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:51:50,615 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 685 transitions. [2021-12-06 20:51:50,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:50,615 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 685 transitions. [2021-12-06 20:51:50,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 20:51:50,618 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:51:50,618 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:51:50,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 20:51:50,618 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:51:50,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:51:50,619 INFO L85 PathProgramCache]: Analyzing trace with hash 890430339, now seen corresponding path program 1 times [2021-12-06 20:51:50,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:51:50,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110357388] [2021-12-06 20:51:50,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:51:50,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:51:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:51:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:51:50,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:51:50,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110357388] [2021-12-06 20:51:50,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110357388] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:51:50,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:51:50,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:51:50,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794501518] [2021-12-06 20:51:50,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:51:50,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:51:50,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:51:50,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:51:50,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:51:50,684 INFO L87 Difference]: Start difference. First operand 446 states and 685 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:50,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:51:50,718 INFO L93 Difference]: Finished difference Result 1186 states and 1863 transitions. [2021-12-06 20:51:50,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:51:50,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-06 20:51:50,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:51:50,722 INFO L225 Difference]: With dead ends: 1186 [2021-12-06 20:51:50,723 INFO L226 Difference]: Without dead ends: 784 [2021-12-06 20:51:50,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:51:50,725 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 161 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:51:50,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 505 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:51:50,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-12-06 20:51:50,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 782. [2021-12-06 20:51:50,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 1.558258642765685) internal successors, (1217), 781 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:50,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1217 transitions. [2021-12-06 20:51:50,764 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1217 transitions. Word has length 76 [2021-12-06 20:51:50,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:51:50,765 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 1217 transitions. [2021-12-06 20:51:50,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:50,765 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1217 transitions. [2021-12-06 20:51:50,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-06 20:51:50,767 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:51:50,767 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:51:50,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 20:51:50,767 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:51:50,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:51:50,768 INFO L85 PathProgramCache]: Analyzing trace with hash -806203398, now seen corresponding path program 1 times [2021-12-06 20:51:50,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:51:50,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971678593] [2021-12-06 20:51:50,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:51:50,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:51:50,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:51:50,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:51:50,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:51:50,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971678593] [2021-12-06 20:51:50,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971678593] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:51:50,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:51:50,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:51:50,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338547782] [2021-12-06 20:51:50,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:51:50,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:51:50,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:51:50,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:51:50,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:51:50,827 INFO L87 Difference]: Start difference. First operand 782 states and 1217 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:50,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:51:50,879 INFO L93 Difference]: Finished difference Result 2130 states and 3355 transitions. [2021-12-06 20:51:50,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:51:50,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-06 20:51:50,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:51:50,886 INFO L225 Difference]: With dead ends: 2130 [2021-12-06 20:51:50,887 INFO L226 Difference]: Without dead ends: 1392 [2021-12-06 20:51:50,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:51:50,889 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 156 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:51:50,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 490 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:51:50,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2021-12-06 20:51:50,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1390. [2021-12-06 20:51:50,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 1.564434845212383) internal successors, (2173), 1389 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:50,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 2173 transitions. [2021-12-06 20:51:50,944 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 2173 transitions. Word has length 77 [2021-12-06 20:51:50,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:51:50,944 INFO L470 AbstractCegarLoop]: Abstraction has 1390 states and 2173 transitions. [2021-12-06 20:51:50,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:50,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 2173 transitions. [2021-12-06 20:51:50,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-06 20:51:50,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:51:50,945 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:51:50,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 20:51:50,946 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:51:50,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:51:50,946 INFO L85 PathProgramCache]: Analyzing trace with hash -904090240, now seen corresponding path program 1 times [2021-12-06 20:51:50,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:51:50,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725697675] [2021-12-06 20:51:50,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:51:50,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:51:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:51:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:51:50,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:51:50,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725697675] [2021-12-06 20:51:50,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725697675] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:51:50,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:51:50,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:51:50,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39576438] [2021-12-06 20:51:50,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:51:50,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:51:50,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:51:50,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:51:50,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:51:50,989 INFO L87 Difference]: Start difference. First operand 1390 states and 2173 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:51,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:51:51,072 INFO L93 Difference]: Finished difference Result 3826 states and 6015 transitions. [2021-12-06 20:51:51,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:51:51,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-12-06 20:51:51,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:51:51,090 INFO L225 Difference]: With dead ends: 3826 [2021-12-06 20:51:51,090 INFO L226 Difference]: Without dead ends: 2480 [2021-12-06 20:51:51,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:51:51,093 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 151 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:51:51,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 475 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:51:51,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2480 states. [2021-12-06 20:51:51,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2480 to 2478. [2021-12-06 20:51:51,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 1.5619701251513929) internal successors, (3869), 2477 states have internal predecessors, (3869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:51,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 3869 transitions. [2021-12-06 20:51:51,184 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 3869 transitions. Word has length 78 [2021-12-06 20:51:51,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:51:51,185 INFO L470 AbstractCegarLoop]: Abstraction has 2478 states and 3869 transitions. [2021-12-06 20:51:51,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:51,185 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 3869 transitions. [2021-12-06 20:51:51,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 20:51:51,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:51:51,186 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:51:51,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 20:51:51,186 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:51:51,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:51:51,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1797609537, now seen corresponding path program 1 times [2021-12-06 20:51:51,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:51:51,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789877191] [2021-12-06 20:51:51,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:51:51,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:51:51,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:51:51,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:51:51,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:51:51,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789877191] [2021-12-06 20:51:51,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789877191] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:51:51,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:51:51,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 20:51:51,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330701501] [2021-12-06 20:51:51,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:51:51,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 20:51:51,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:51:51,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 20:51:51,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:51:51,271 INFO L87 Difference]: Start difference. First operand 2478 states and 3869 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:51,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:51:51,982 INFO L93 Difference]: Finished difference Result 19516 states and 30644 transitions. [2021-12-06 20:51:51,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 20:51:51,983 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-06 20:51:51,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:51:52,059 INFO L225 Difference]: With dead ends: 19516 [2021-12-06 20:51:52,059 INFO L226 Difference]: Without dead ends: 17082 [2021-12-06 20:51:52,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-12-06 20:51:52,066 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 2601 mSDsluCounter, 3042 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2601 SdHoareTripleChecker+Valid, 3272 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:51:52,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2601 Valid, 3272 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:51:52,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17082 states. [2021-12-06 20:51:52,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17082 to 4910. [2021-12-06 20:51:52,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4910 states, 4909 states have (on average 1.5540843348950906) internal successors, (7629), 4909 states have internal predecessors, (7629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:52,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4910 states to 4910 states and 7629 transitions. [2021-12-06 20:51:52,452 INFO L78 Accepts]: Start accepts. Automaton has 4910 states and 7629 transitions. Word has length 79 [2021-12-06 20:51:52,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:51:52,453 INFO L470 AbstractCegarLoop]: Abstraction has 4910 states and 7629 transitions. [2021-12-06 20:51:52,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:52,453 INFO L276 IsEmpty]: Start isEmpty. Operand 4910 states and 7629 transitions. [2021-12-06 20:51:52,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-06 20:51:52,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:51:52,454 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:51:52,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 20:51:52,454 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:51:52,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:51:52,455 INFO L85 PathProgramCache]: Analyzing trace with hash -128135395, now seen corresponding path program 1 times [2021-12-06 20:51:52,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:51:52,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274042044] [2021-12-06 20:51:52,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:51:52,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:51:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:51:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:51:52,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:51:52,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274042044] [2021-12-06 20:51:52,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274042044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:51:52,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:51:52,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 20:51:52,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919556981] [2021-12-06 20:51:52,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:51:52,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 20:51:52,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:51:52,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 20:51:52,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:51:52,614 INFO L87 Difference]: Start difference. First operand 4910 states and 7629 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:53,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:51:53,926 INFO L93 Difference]: Finished difference Result 30106 states and 46547 transitions. [2021-12-06 20:51:53,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 20:51:53,927 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-06 20:51:53,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:51:53,980 INFO L225 Difference]: With dead ends: 30106 [2021-12-06 20:51:53,980 INFO L226 Difference]: Without dead ends: 25240 [2021-12-06 20:51:53,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:51:53,991 INFO L933 BasicCegarLoop]: 674 mSDtfsCounter, 1106 mSDsluCounter, 1081 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1106 SdHoareTripleChecker+Valid, 1755 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:51:53,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1106 Valid, 1755 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:51:54,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25240 states. [2021-12-06 20:51:55,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25240 to 25230. [2021-12-06 20:51:55,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25230 states, 25229 states have (on average 1.54159895358516) internal successors, (38893), 25229 states have internal predecessors, (38893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:55,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25230 states to 25230 states and 38893 transitions. [2021-12-06 20:51:55,355 INFO L78 Accepts]: Start accepts. Automaton has 25230 states and 38893 transitions. Word has length 80 [2021-12-06 20:51:55,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:51:55,356 INFO L470 AbstractCegarLoop]: Abstraction has 25230 states and 38893 transitions. [2021-12-06 20:51:55,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:55,356 INFO L276 IsEmpty]: Start isEmpty. Operand 25230 states and 38893 transitions. [2021-12-06 20:51:55,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 20:51:55,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:51:55,358 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:51:55,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 20:51:55,358 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:51:55,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:51:55,358 INFO L85 PathProgramCache]: Analyzing trace with hash 750877787, now seen corresponding path program 1 times [2021-12-06 20:51:55,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:51:55,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136227065] [2021-12-06 20:51:55,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:51:55,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:51:55,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:51:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:51:55,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:51:55,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136227065] [2021-12-06 20:51:55,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136227065] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:51:55,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:51:55,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:51:55,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537337435] [2021-12-06 20:51:55,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:51:55,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:51:55,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:51:55,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:51:55,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:51:55,420 INFO L87 Difference]: Start difference. First operand 25230 states and 38893 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:57,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:51:57,467 INFO L93 Difference]: Finished difference Result 69010 states and 105967 transitions. [2021-12-06 20:51:57,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:51:57,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-06 20:51:57,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:51:57,529 INFO L225 Difference]: With dead ends: 69010 [2021-12-06 20:51:57,529 INFO L226 Difference]: Without dead ends: 43824 [2021-12-06 20:51:57,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:51:57,556 INFO L933 BasicCegarLoop]: 387 mSDtfsCounter, 173 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:51:57,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 560 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:51:57,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43824 states. [2021-12-06 20:51:59,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43824 to 43822. [2021-12-06 20:51:59,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43822 states, 43821 states have (on average 1.5228543392437417) internal successors, (66733), 43821 states have internal predecessors, (66733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:59,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43822 states to 43822 states and 66733 transitions. [2021-12-06 20:51:59,725 INFO L78 Accepts]: Start accepts. Automaton has 43822 states and 66733 transitions. Word has length 81 [2021-12-06 20:51:59,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:51:59,725 INFO L470 AbstractCegarLoop]: Abstraction has 43822 states and 66733 transitions. [2021-12-06 20:51:59,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:51:59,725 INFO L276 IsEmpty]: Start isEmpty. Operand 43822 states and 66733 transitions. [2021-12-06 20:51:59,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 20:51:59,726 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:51:59,726 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:51:59,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 20:51:59,727 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:51:59,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:51:59,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1315274732, now seen corresponding path program 1 times [2021-12-06 20:51:59,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:51:59,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800780416] [2021-12-06 20:51:59,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:51:59,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:51:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:51:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:51:59,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:51:59,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800780416] [2021-12-06 20:51:59,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800780416] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:51:59,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:51:59,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:51:59,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074953990] [2021-12-06 20:51:59,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:51:59,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:51:59,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:51:59,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:51:59,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:51:59,777 INFO L87 Difference]: Start difference. First operand 43822 states and 66733 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:04,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:04,395 INFO L93 Difference]: Finished difference Result 131378 states and 200111 transitions. [2021-12-06 20:52:04,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 20:52:04,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-06 20:52:04,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:04,517 INFO L225 Difference]: With dead ends: 131378 [2021-12-06 20:52:04,517 INFO L226 Difference]: Without dead ends: 87600 [2021-12-06 20:52:04,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:52:04,554 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 1002 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1002 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:04,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1002 Valid, 260 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:52:04,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87600 states. [2021-12-06 20:52:09,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87600 to 87598. [2021-12-06 20:52:09,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87598 states, 87597 states have (on average 1.5150861330867496) internal successors, (132717), 87597 states have internal predecessors, (132717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:09,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87598 states to 87598 states and 132717 transitions. [2021-12-06 20:52:09,701 INFO L78 Accepts]: Start accepts. Automaton has 87598 states and 132717 transitions. Word has length 82 [2021-12-06 20:52:09,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:09,702 INFO L470 AbstractCegarLoop]: Abstraction has 87598 states and 132717 transitions. [2021-12-06 20:52:09,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:09,702 INFO L276 IsEmpty]: Start isEmpty. Operand 87598 states and 132717 transitions. [2021-12-06 20:52:09,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 20:52:09,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:09,703 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:09,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 20:52:09,703 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:09,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:09,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1885691313, now seen corresponding path program 1 times [2021-12-06 20:52:09,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:09,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465179900] [2021-12-06 20:52:09,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:09,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:09,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:09,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:09,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:09,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465179900] [2021-12-06 20:52:09,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465179900] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:52:09,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:52:09,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:52:09,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370576265] [2021-12-06 20:52:09,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:52:09,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:52:09,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:09,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:52:09,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:52:09,783 INFO L87 Difference]: Start difference. First operand 87598 states and 132717 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:19,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:19,335 INFO L93 Difference]: Finished difference Result 178224 states and 268462 transitions. [2021-12-06 20:52:19,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:52:19,336 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-06 20:52:19,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:19,616 INFO L225 Difference]: With dead ends: 178224 [2021-12-06 20:52:19,616 INFO L226 Difference]: Without dead ends: 178222 [2021-12-06 20:52:19,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:52:19,650 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 364 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:19,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 1143 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:52:19,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178222 states. [2021-12-06 20:52:26,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178222 to 90670. [2021-12-06 20:52:26,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90670 states, 90669 states have (on average 1.4976342520596897) internal successors, (135789), 90669 states have internal predecessors, (135789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:26,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90670 states to 90670 states and 135789 transitions. [2021-12-06 20:52:26,267 INFO L78 Accepts]: Start accepts. Automaton has 90670 states and 135789 transitions. Word has length 82 [2021-12-06 20:52:26,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:26,267 INFO L470 AbstractCegarLoop]: Abstraction has 90670 states and 135789 transitions. [2021-12-06 20:52:26,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:26,268 INFO L276 IsEmpty]: Start isEmpty. Operand 90670 states and 135789 transitions. [2021-12-06 20:52:26,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 20:52:26,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:26,269 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:26,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 20:52:26,269 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:26,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:26,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1683684575, now seen corresponding path program 1 times [2021-12-06 20:52:26,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:26,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454241309] [2021-12-06 20:52:26,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:26,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:26,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:26,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:26,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:26,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454241309] [2021-12-06 20:52:26,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454241309] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:52:26,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:52:26,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:52:26,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410517877] [2021-12-06 20:52:26,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:52:26,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:52:26,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:26,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:52:26,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:52:26,310 INFO L87 Difference]: Start difference. First operand 90670 states and 135789 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:33,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:52:33,030 INFO L93 Difference]: Finished difference Result 202900 states and 303393 transitions. [2021-12-06 20:52:33,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:52:33,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-06 20:52:33,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:52:33,201 INFO L225 Difference]: With dead ends: 202900 [2021-12-06 20:52:33,201 INFO L226 Difference]: Without dead ends: 112274 [2021-12-06 20:52:33,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:52:33,256 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 138 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:52:33,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 414 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:52:33,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112274 states. [2021-12-06 20:52:40,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112274 to 111920. [2021-12-06 20:52:40,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111920 states, 111919 states have (on average 1.4884961445330998) internal successors, (166591), 111919 states have internal predecessors, (166591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:40,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111920 states to 111920 states and 166591 transitions. [2021-12-06 20:52:40,686 INFO L78 Accepts]: Start accepts. Automaton has 111920 states and 166591 transitions. Word has length 83 [2021-12-06 20:52:40,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:52:40,686 INFO L470 AbstractCegarLoop]: Abstraction has 111920 states and 166591 transitions. [2021-12-06 20:52:40,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:52:40,686 INFO L276 IsEmpty]: Start isEmpty. Operand 111920 states and 166591 transitions. [2021-12-06 20:52:40,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-06 20:52:40,720 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:52:40,720 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:52:40,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 20:52:40,721 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:52:40,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:52:40,721 INFO L85 PathProgramCache]: Analyzing trace with hash 967908386, now seen corresponding path program 1 times [2021-12-06 20:52:40,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:52:40,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654102496] [2021-12-06 20:52:40,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:40,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:52:40,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:52:40,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:52:40,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654102496] [2021-12-06 20:52:40,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654102496] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:52:40,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917662974] [2021-12-06 20:52:40,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:52:40,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:52:40,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62015ba3-5a96-40cc-9d1b-a515761256eb/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:52:40,884 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62015ba3-5a96-40cc-9d1b-a515761256eb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:52:40,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62015ba3-5a96-40cc-9d1b-a515761256eb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 20:52:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:52:40,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 20:52:40,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:52:41,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 20:52:41,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:52:41,620 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 20:52:41,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917662974] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:52:41,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:52:41,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2021-12-06 20:52:41,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983023591] [2021-12-06 20:52:41,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:52:41,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 20:52:41,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:52:41,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 20:52:41,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-06 20:52:41,622 INFO L87 Difference]: Start difference. First operand 111920 states and 166591 transitions. Second operand has 14 states, 14 states have (on average 23.571428571428573) internal successors, (330), 14 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:55:16,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:55:16,288 INFO L93 Difference]: Finished difference Result 2011868 states and 2970093 transitions. [2021-12-06 20:55:16,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-12-06 20:55:16,289 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 23.571428571428573) internal successors, (330), 14 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-12-06 20:55:16,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:55:20,470 INFO L225 Difference]: With dead ends: 2011868 [2021-12-06 20:55:20,470 INFO L226 Difference]: Without dead ends: 1899994 [2021-12-06 20:55:21,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8039 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3160, Invalid=15200, Unknown=0, NotChecked=0, Total=18360 [2021-12-06 20:55:21,105 INFO L933 BasicCegarLoop]: 1069 mSDtfsCounter, 17137 mSDsluCounter, 5469 mSDsCounter, 0 mSdLazyCounter, 5365 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17137 SdHoareTripleChecker+Valid, 6538 SdHoareTripleChecker+Invalid, 5595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 5365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:55:21,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17137 Valid, 6538 Invalid, 5595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 5365 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-12-06 20:55:22,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899994 states. [2021-12-06 20:56:27,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899994 to 622432. [2021-12-06 20:56:28,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622432 states, 622431 states have (on average 1.465349572884384) internal successors, (912079), 622431 states have internal predecessors, (912079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:56:29,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622432 states to 622432 states and 912079 transitions. [2021-12-06 20:56:29,552 INFO L78 Accepts]: Start accepts. Automaton has 622432 states and 912079 transitions. Word has length 114 [2021-12-06 20:56:29,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:56:29,552 INFO L470 AbstractCegarLoop]: Abstraction has 622432 states and 912079 transitions. [2021-12-06 20:56:29,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.571428571428573) internal successors, (330), 14 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:56:29,552 INFO L276 IsEmpty]: Start isEmpty. Operand 622432 states and 912079 transitions. [2021-12-06 20:56:29,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-06 20:56:29,729 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:56:29,729 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:56:29,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62015ba3-5a96-40cc-9d1b-a515761256eb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 20:56:29,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62015ba3-5a96-40cc-9d1b-a515761256eb/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:56:29,931 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:56:29,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:56:29,933 INFO L85 PathProgramCache]: Analyzing trace with hash 124055318, now seen corresponding path program 1 times [2021-12-06 20:56:29,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:56:29,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438943884] [2021-12-06 20:56:29,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:56:29,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:56:30,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:56:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:56:30,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:56:30,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438943884] [2021-12-06 20:56:30,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438943884] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:56:30,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:56:30,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:56:30,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377967644] [2021-12-06 20:56:30,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:56:30,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:56:30,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:56:30,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:56:30,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:56:30,071 INFO L87 Difference]: Start difference. First operand 622432 states and 912079 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:57:59,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:59,222 INFO L93 Difference]: Finished difference Result 1566437 states and 2302227 transitions. [2021-12-06 20:57:59,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:57:59,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-12-06 20:57:59,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:01,364 INFO L225 Difference]: With dead ends: 1566437 [2021-12-06 20:58:01,364 INFO L226 Difference]: Without dead ends: 1026115 [2021-12-06 20:58:01,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:58:01,865 INFO L933 BasicCegarLoop]: 376 mSDtfsCounter, 141 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:01,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 591 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:58:02,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026115 states. [2021-12-06 20:59:39,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026115 to 1026113. [2021-12-06 20:59:40,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026113 states, 1026112 states have (on average 1.46031719734298) internal successors, (1498449), 1026112 states have internal predecessors, (1498449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:43,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026113 states to 1026113 states and 1498449 transitions. [2021-12-06 20:59:43,874 INFO L78 Accepts]: Start accepts. Automaton has 1026113 states and 1498449 transitions. Word has length 114 [2021-12-06 20:59:43,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:59:43,874 INFO L470 AbstractCegarLoop]: Abstraction has 1026113 states and 1498449 transitions. [2021-12-06 20:59:43,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:43,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1026113 states and 1498449 transitions. [2021-12-06 20:59:43,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-06 20:59:43,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:59:43,932 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:59:43,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 20:59:43,932 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:59:43,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:59:43,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1646571923, now seen corresponding path program 1 times [2021-12-06 20:59:43,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:59:43,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144287568] [2021-12-06 20:59:43,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:59:43,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:59:43,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 20:59:44,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:59:44,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144287568] [2021-12-06 20:59:44,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144287568] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:59:44,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:59:44,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 20:59:44,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553885411] [2021-12-06 20:59:44,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:59:44,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 20:59:44,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:59:44,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 20:59:44,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:59:44,002 INFO L87 Difference]: Start difference. First operand 1026113 states and 1498449 transitions. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)