./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label14.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c37f2c-153f-4bd1-8637-6c1221dae5cd/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c37f2c-153f-4bd1-8637-6c1221dae5cd/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c37f2c-153f-4bd1-8637-6c1221dae5cd/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c37f2c-153f-4bd1-8637-6c1221dae5cd/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label14.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c37f2c-153f-4bd1-8637-6c1221dae5cd/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c37f2c-153f-4bd1-8637-6c1221dae5cd/bin/uautomizer-IVEQpCNsaX --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 6b9a8cf062c769ab6372057423b232460c4eac80bd30ee0857d87935f050ecf1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:49:18,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:49:18,237 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:49:18,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:49:18,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:49:18,309 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:49:18,312 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:49:18,318 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:49:18,323 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:49:18,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:49:18,336 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:49:18,339 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:49:18,339 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:49:18,341 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:49:18,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:49:18,350 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:49:18,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:49:18,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:49:18,358 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:49:18,372 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:49:18,375 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:49:18,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:49:18,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:49:18,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:49:18,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:49:18,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:49:18,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:49:18,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:49:18,402 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:49:18,404 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:49:18,405 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:49:18,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:49:18,413 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:49:18,416 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:49:18,421 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:49:18,422 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:49:18,423 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:49:18,423 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:49:18,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:49:18,426 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:49:18,427 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:49:18,429 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c37f2c-153f-4bd1-8637-6c1221dae5cd/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:49:18,472 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:49:18,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:49:18,473 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:49:18,474 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:49:18,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:49:18,476 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:49:18,476 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:49:18,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:49:18,477 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:49:18,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:49:18,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:49:18,482 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:49:18,482 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:49:18,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:49:18,483 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:49:18,483 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:49:18,483 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:49:18,484 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:49:18,484 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:49:18,484 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:49:18,485 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:49:18,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:49:18,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:49:18,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:49:18,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:49:18,487 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:49:18,487 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:49:18,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:49:18,488 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:49:18,490 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:49:18,491 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:49:18,491 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:49:18,492 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_91c37f2c-153f-4bd1-8637-6c1221dae5cd/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c37f2c-153f-4bd1-8637-6c1221dae5cd/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b9a8cf062c769ab6372057423b232460c4eac80bd30ee0857d87935f050ecf1 [2021-11-09 09:49:18,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:49:18,974 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:49:18,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:49:18,980 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:49:18,981 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:49:18,982 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c37f2c-153f-4bd1-8637-6c1221dae5cd/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/eca-rers2012/Problem13_label14.c [2021-11-09 09:49:19,107 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c37f2c-153f-4bd1-8637-6c1221dae5cd/bin/uautomizer-IVEQpCNsaX/data/900cb3cfd/eca0dab165754fe98c3871983d27476a/FLAGe0e9e7ec8 [2021-11-09 09:49:20,281 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:49:20,283 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c37f2c-153f-4bd1-8637-6c1221dae5cd/sv-benchmarks/c/eca-rers2012/Problem13_label14.c [2021-11-09 09:49:20,333 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c37f2c-153f-4bd1-8637-6c1221dae5cd/bin/uautomizer-IVEQpCNsaX/data/900cb3cfd/eca0dab165754fe98c3871983d27476a/FLAGe0e9e7ec8 [2021-11-09 09:49:20,624 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c37f2c-153f-4bd1-8637-6c1221dae5cd/bin/uautomizer-IVEQpCNsaX/data/900cb3cfd/eca0dab165754fe98c3871983d27476a [2021-11-09 09:49:20,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:49:20,630 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:49:20,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:49:20,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:49:20,638 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:49:20,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:49:20" (1/1) ... [2021-11-09 09:49:20,642 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c937bb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:49:20, skipping insertion in model container [2021-11-09 09:49:20,643 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:49:20" (1/1) ... [2021-11-09 09:49:20,655 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:49:20,905 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:49:21,444 WARN L228 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_91c37f2c-153f-4bd1-8637-6c1221dae5cd/sv-benchmarks/c/eca-rers2012/Problem13_label14.c[5911,5924] [2021-11-09 09:49:23,252 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:49:23,266 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:49:23,335 WARN L228 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_91c37f2c-153f-4bd1-8637-6c1221dae5cd/sv-benchmarks/c/eca-rers2012/Problem13_label14.c[5911,5924] [2021-11-09 09:49:24,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:49:24,523 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:49:24,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:49:24 WrapperNode [2021-11-09 09:49:24,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:49:24,527 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:49:24,527 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:49:24,527 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:49:24,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:49:24" (1/1) ... [2021-11-09 09:49:24,644 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:49:24" (1/1) ... [2021-11-09 09:49:25,580 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:49:25,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:49:25,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:49:25,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:49:25,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:49:24" (1/1) ... [2021-11-09 09:49:25,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:49:24" (1/1) ... [2021-11-09 09:49:25,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:49:24" (1/1) ... [2021-11-09 09:49:25,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:49:24" (1/1) ... [2021-11-09 09:49:26,398 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:49:24" (1/1) ... [2021-11-09 09:49:26,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:49:24" (1/1) ... [2021-11-09 09:49:26,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:49:24" (1/1) ... [2021-11-09 09:49:26,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:49:26,810 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:49:26,810 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:49:26,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:49:26,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:49:24" (1/1) ... [2021-11-09 09:49:26,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:49:26,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c37f2c-153f-4bd1-8637-6c1221dae5cd/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:49:26,869 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c37f2c-153f-4bd1-8637-6c1221dae5cd/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:49:26,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c37f2c-153f-4bd1-8637-6c1221dae5cd/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:49:26,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:49:26,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:49:26,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:49:26,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:49:35,531 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:49:35,531 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-09 09:49:35,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:49:35 BoogieIcfgContainer [2021-11-09 09:49:35,538 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:49:35,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:49:35,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:49:35,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:49:35,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:49:20" (1/3) ... [2021-11-09 09:49:35,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29abd754 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:49:35, skipping insertion in model container [2021-11-09 09:49:35,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:49:24" (2/3) ... [2021-11-09 09:49:35,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29abd754 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:49:35, skipping insertion in model container [2021-11-09 09:49:35,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:49:35" (3/3) ... [2021-11-09 09:49:35,556 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label14.c [2021-11-09 09:49:35,568 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:49:35,569 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 09:49:35,664 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:49:35,680 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 [2021-11-09 09:49:35,681 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 09:49:35,749 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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) [2021-11-09 09:49:35,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-09 09:49:35,758 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:49:35,759 INFO L513 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] [2021-11-09 09:49:35,760 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:49:35,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:49:35,768 INFO L85 PathProgramCache]: Analyzing trace with hash 751578873, now seen corresponding path program 1 times [2021-11-09 09:49:35,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:49:35,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137656708] [2021-11-09 09:49:35,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:49:35,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:49:35,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:49:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:49:36,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:49:36,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137656708] [2021-11-09 09:49:36,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137656708] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:49:36,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:49:36,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:49:36,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163050984] [2021-11-09 09:49:36,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:49:36,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:49:36,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:49:36,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:49:36,339 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 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) [2021-11-09 09:49:48,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:49:48,023 INFO L93 Difference]: Finished difference Result 3829 states and 7206 transitions. [2021-11-09 09:49:48,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:49:48,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 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 41 [2021-11-09 09:49:48,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:49:48,089 INFO L225 Difference]: With dead ends: 3829 [2021-11-09 09:49:48,090 INFO L226 Difference]: Without dead ends: 2664 [2021-11-09 09:49:48,107 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:49:48,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-11-09 09:49:48,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2663. [2021-11-09 09:49:48,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2662 states have (on average 1.460931630353118) internal successors, (3889), 2662 states have internal predecessors, (3889), 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) [2021-11-09 09:49:48,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 3889 transitions. [2021-11-09 09:49:48,389 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 3889 transitions. Word has length 41 [2021-11-09 09:49:48,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:49:48,392 INFO L470 AbstractCegarLoop]: Abstraction has 2663 states and 3889 transitions. [2021-11-09 09:49:48,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 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) [2021-11-09 09:49:48,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 3889 transitions. [2021-11-09 09:49:48,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-09 09:49:48,412 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:49:48,413 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:49:48,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:49:48,414 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:49:48,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:49:48,415 INFO L85 PathProgramCache]: Analyzing trace with hash 791032719, now seen corresponding path program 1 times [2021-11-09 09:49:48,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:49:48,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719939633] [2021-11-09 09:49:48,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:49:48,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:49:48,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:49:48,930 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-09 09:49:48,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:49:48,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719939633] [2021-11-09 09:49:48,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719939633] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:49:48,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:49:48,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:49:48,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998208014] [2021-11-09 09:49:48,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:49:48,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:49:48,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:49:48,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:49:48,940 INFO L87 Difference]: Start difference. First operand 2663 states and 3889 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 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) [2021-11-09 09:49:55,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:49:55,453 INFO L93 Difference]: Finished difference Result 6142 states and 9712 transitions. [2021-11-09 09:49:55,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:49:55,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 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 166 [2021-11-09 09:49:55,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:49:55,489 INFO L225 Difference]: With dead ends: 6142 [2021-11-09 09:49:55,490 INFO L226 Difference]: Without dead ends: 4268 [2021-11-09 09:49:55,494 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:49:55,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4268 states. [2021-11-09 09:49:55,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4268 to 4254. [2021-11-09 09:49:55,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4254 states, 4253 states have (on average 1.3515165765342112) internal successors, (5748), 4253 states have internal predecessors, (5748), 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) [2021-11-09 09:49:55,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4254 states to 4254 states and 5748 transitions. [2021-11-09 09:49:55,629 INFO L78 Accepts]: Start accepts. Automaton has 4254 states and 5748 transitions. Word has length 166 [2021-11-09 09:49:55,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:49:55,635 INFO L470 AbstractCegarLoop]: Abstraction has 4254 states and 5748 transitions. [2021-11-09 09:49:55,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 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) [2021-11-09 09:49:55,636 INFO L276 IsEmpty]: Start isEmpty. Operand 4254 states and 5748 transitions. [2021-11-09 09:49:55,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-09 09:49:55,644 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:49:55,645 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:49:55,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:49:55,647 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:49:55,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:49:55,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1372340963, now seen corresponding path program 1 times [2021-11-09 09:49:55,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:49:55,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944711200] [2021-11-09 09:49:55,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:49:55,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:49:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:49:55,897 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-09 09:49:55,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:49:55,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944711200] [2021-11-09 09:49:55,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944711200] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:49:55,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:49:55,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:49:55,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055190632] [2021-11-09 09:49:55,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:49:55,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:49:55,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:49:55,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:49:55,902 INFO L87 Difference]: Start difference. First operand 4254 states and 5748 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 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) [2021-11-09 09:50:01,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:01,177 INFO L93 Difference]: Finished difference Result 10897 states and 15274 transitions. [2021-11-09 09:50:01,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:50:01,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 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 208 [2021-11-09 09:50:01,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:01,235 INFO L225 Difference]: With dead ends: 10897 [2021-11-09 09:50:01,236 INFO L226 Difference]: Without dead ends: 7432 [2021-11-09 09:50:01,242 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:50:01,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7432 states. [2021-11-09 09:50:01,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7432 to 7426. [2021-11-09 09:50:01,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7426 states, 7425 states have (on average 1.288888888888889) internal successors, (9570), 7425 states have internal predecessors, (9570), 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) [2021-11-09 09:50:01,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7426 states to 7426 states and 9570 transitions. [2021-11-09 09:50:01,514 INFO L78 Accepts]: Start accepts. Automaton has 7426 states and 9570 transitions. Word has length 208 [2021-11-09 09:50:01,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:01,516 INFO L470 AbstractCegarLoop]: Abstraction has 7426 states and 9570 transitions. [2021-11-09 09:50:01,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 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) [2021-11-09 09:50:01,517 INFO L276 IsEmpty]: Start isEmpty. Operand 7426 states and 9570 transitions. [2021-11-09 09:50:01,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-09 09:50:01,523 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:01,524 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:01,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:50:01,525 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:01,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:01,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1651057734, now seen corresponding path program 1 times [2021-11-09 09:50:01,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:01,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624176324] [2021-11-09 09:50:01,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:01,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:01,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:01,792 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-09 09:50:01,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:01,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624176324] [2021-11-09 09:50:01,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624176324] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:50:01,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:50:01,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:50:01,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162447546] [2021-11-09 09:50:01,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:50:01,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:01,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:50:01,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:50:01,805 INFO L87 Difference]: Start difference. First operand 7426 states and 9570 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 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) [2021-11-09 09:50:07,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:07,062 INFO L93 Difference]: Finished difference Result 19619 states and 25904 transitions. [2021-11-09 09:50:07,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:50:07,063 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 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 222 [2021-11-09 09:50:07,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:07,172 INFO L225 Difference]: With dead ends: 19619 [2021-11-09 09:50:07,173 INFO L226 Difference]: Without dead ends: 12982 [2021-11-09 09:50:07,187 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:50:07,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12982 states. [2021-11-09 09:50:07,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12982 to 12975. [2021-11-09 09:50:07,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12975 states, 12974 states have (on average 1.2719284723292739) internal successors, (16502), 12974 states have internal predecessors, (16502), 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) [2021-11-09 09:50:07,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12975 states to 12975 states and 16502 transitions. [2021-11-09 09:50:07,639 INFO L78 Accepts]: Start accepts. Automaton has 12975 states and 16502 transitions. Word has length 222 [2021-11-09 09:50:07,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:07,640 INFO L470 AbstractCegarLoop]: Abstraction has 12975 states and 16502 transitions. [2021-11-09 09:50:07,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 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) [2021-11-09 09:50:07,642 INFO L276 IsEmpty]: Start isEmpty. Operand 12975 states and 16502 transitions. [2021-11-09 09:50:07,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-09 09:50:07,649 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:07,649 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:07,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 09:50:07,650 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:07,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:07,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1939340195, now seen corresponding path program 1 times [2021-11-09 09:50:07,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:07,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628587486] [2021-11-09 09:50:07,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:07,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:07,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-09 09:50:07,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:07,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628587486] [2021-11-09 09:50:07,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628587486] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:50:07,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:50:07,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:50:07,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701431336] [2021-11-09 09:50:07,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:50:07,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:07,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:50:07,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:50:07,922 INFO L87 Difference]: Start difference. First operand 12975 states and 16502 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 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) [2021-11-09 09:50:13,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:13,118 INFO L93 Difference]: Finished difference Result 36180 states and 46592 transitions. [2021-11-09 09:50:13,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:50:13,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 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 238 [2021-11-09 09:50:13,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:13,185 INFO L225 Difference]: With dead ends: 36180 [2021-11-09 09:50:13,185 INFO L226 Difference]: Without dead ends: 23994 [2021-11-09 09:50:13,207 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:50:13,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23994 states. [2021-11-09 09:50:13,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23994 to 22416. [2021-11-09 09:50:13,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22416 states, 22415 states have (on average 1.211153245594468) internal successors, (27148), 22415 states have internal predecessors, (27148), 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) [2021-11-09 09:50:13,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22416 states to 22416 states and 27148 transitions. [2021-11-09 09:50:13,709 INFO L78 Accepts]: Start accepts. Automaton has 22416 states and 27148 transitions. Word has length 238 [2021-11-09 09:50:13,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:13,710 INFO L470 AbstractCegarLoop]: Abstraction has 22416 states and 27148 transitions. [2021-11-09 09:50:13,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 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) [2021-11-09 09:50:13,711 INFO L276 IsEmpty]: Start isEmpty. Operand 22416 states and 27148 transitions. [2021-11-09 09:50:13,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-11-09 09:50:13,719 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:13,719 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 09:50:13,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 09:50:13,720 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:13,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:13,721 INFO L85 PathProgramCache]: Analyzing trace with hash -108620366, now seen corresponding path program 1 times [2021-11-09 09:50:13,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:13,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207547825] [2021-11-09 09:50:13,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:13,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:13,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:13,913 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 290 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-09 09:50:13,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:13,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207547825] [2021-11-09 09:50:13,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207547825] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:50:13,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:50:13,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:50:13,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456924635] [2021-11-09 09:50:13,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:50:13,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:13,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:50:13,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:50:13,923 INFO L87 Difference]: Start difference. First operand 22416 states and 27148 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 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) [2021-11-09 09:50:19,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:19,377 INFO L93 Difference]: Finished difference Result 55858 states and 69068 transitions. [2021-11-09 09:50:19,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:50:19,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 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 281 [2021-11-09 09:50:19,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:19,662 INFO L225 Difference]: With dead ends: 55858 [2021-11-09 09:50:19,662 INFO L226 Difference]: Without dead ends: 34231 [2021-11-09 09:50:19,687 INFO L786 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 [2021-11-09 09:50:19,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34231 states. [2021-11-09 09:50:20,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34231 to 33434. [2021-11-09 09:50:20,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33434 states, 33433 states have (on average 1.1906200460622738) internal successors, (39806), 33433 states have internal predecessors, (39806), 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) [2021-11-09 09:50:20,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33434 states to 33434 states and 39806 transitions. [2021-11-09 09:50:20,367 INFO L78 Accepts]: Start accepts. Automaton has 33434 states and 39806 transitions. Word has length 281 [2021-11-09 09:50:20,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:20,368 INFO L470 AbstractCegarLoop]: Abstraction has 33434 states and 39806 transitions. [2021-11-09 09:50:20,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 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) [2021-11-09 09:50:20,369 INFO L276 IsEmpty]: Start isEmpty. Operand 33434 states and 39806 transitions. [2021-11-09 09:50:20,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2021-11-09 09:50:20,380 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:20,380 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:20,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 09:50:20,381 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:20,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:20,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1558582370, now seen corresponding path program 1 times [2021-11-09 09:50:20,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:20,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124089167] [2021-11-09 09:50:20,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:20,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:20,600 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 353 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-09 09:50:20,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:20,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124089167] [2021-11-09 09:50:20,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124089167] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:50:20,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:50:20,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:50:20,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531187512] [2021-11-09 09:50:20,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:50:20,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:20,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:50:20,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:50:20,605 INFO L87 Difference]: Start difference. First operand 33434 states and 39806 transitions. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 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) [2021-11-09 09:50:31,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:31,007 INFO L93 Difference]: Finished difference Result 117462 states and 141040 transitions. [2021-11-09 09:50:31,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:50:31,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 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 329 [2021-11-09 09:50:31,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:31,271 INFO L225 Difference]: With dead ends: 117462 [2021-11-09 09:50:31,271 INFO L226 Difference]: Without dead ends: 84817 [2021-11-09 09:50:31,304 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:50:31,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84817 states. [2021-11-09 09:50:32,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84817 to 84687. [2021-11-09 09:50:32,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84687 states, 84686 states have (on average 1.1723425359563564) internal successors, (99281), 84686 states have internal predecessors, (99281), 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) [2021-11-09 09:50:32,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84687 states to 84687 states and 99281 transitions. [2021-11-09 09:50:32,931 INFO L78 Accepts]: Start accepts. Automaton has 84687 states and 99281 transitions. Word has length 329 [2021-11-09 09:50:32,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:32,932 INFO L470 AbstractCegarLoop]: Abstraction has 84687 states and 99281 transitions. [2021-11-09 09:50:32,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 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) [2021-11-09 09:50:32,932 INFO L276 IsEmpty]: Start isEmpty. Operand 84687 states and 99281 transitions. [2021-11-09 09:50:32,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-11-09 09:50:32,947 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:32,948 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 09:50:32,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 09:50:32,948 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:32,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:32,949 INFO L85 PathProgramCache]: Analyzing trace with hash -350269877, now seen corresponding path program 1 times [2021-11-09 09:50:32,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:32,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008329117] [2021-11-09 09:50:32,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:32,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:33,167 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-11-09 09:50:33,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:33,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008329117] [2021-11-09 09:50:33,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008329117] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:50:33,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:50:33,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:50:33,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358735283] [2021-11-09 09:50:33,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:50:33,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:33,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:50:33,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:50:33,173 INFO L87 Difference]: Start difference. First operand 84687 states and 99281 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 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) [2021-11-09 09:50:38,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:38,641 INFO L93 Difference]: Finished difference Result 158351 states and 186725 transitions. [2021-11-09 09:50:38,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:50:38,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 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 338 [2021-11-09 09:50:38,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:38,939 INFO L225 Difference]: With dead ends: 158351 [2021-11-09 09:50:38,939 INFO L226 Difference]: Without dead ends: 84696 [2021-11-09 09:50:38,971 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:50:39,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84696 states. [2021-11-09 09:50:40,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84696 to 84687. [2021-11-09 09:50:40,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84687 states, 84686 states have (on average 1.1715749946862528) internal successors, (99216), 84686 states have internal predecessors, (99216), 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) [2021-11-09 09:50:40,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84687 states to 84687 states and 99216 transitions. [2021-11-09 09:50:40,910 INFO L78 Accepts]: Start accepts. Automaton has 84687 states and 99216 transitions. Word has length 338 [2021-11-09 09:50:40,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:40,911 INFO L470 AbstractCegarLoop]: Abstraction has 84687 states and 99216 transitions. [2021-11-09 09:50:40,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 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) [2021-11-09 09:50:40,911 INFO L276 IsEmpty]: Start isEmpty. Operand 84687 states and 99216 transitions. [2021-11-09 09:50:40,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2021-11-09 09:50:40,920 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:40,921 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-09 09:50:40,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 09:50:40,922 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:40,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:40,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1068831891, now seen corresponding path program 1 times [2021-11-09 09:50:40,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:40,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130806172] [2021-11-09 09:50:40,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:40,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:41,427 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 249 proven. 110 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-09 09:50:41,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:41,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130806172] [2021-11-09 09:50:41,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130806172] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:50:41,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933473989] [2021-11-09 09:50:41,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:41,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:50:41,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c37f2c-153f-4bd1-8637-6c1221dae5cd/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:50:41,431 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c37f2c-153f-4bd1-8637-6c1221dae5cd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:50:41,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c37f2c-153f-4bd1-8637-6c1221dae5cd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:50:41,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:41,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 09:50:41,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:50:43,241 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-11-09 09:50:43,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933473989] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:50:43,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:50:43,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-11-09 09:50:43,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536106981] [2021-11-09 09:50:43,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:50:43,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:43,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:50:43,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:50:43,252 INFO L87 Difference]: Start difference. First operand 84687 states and 99216 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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) [2021-11-09 09:50:48,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:48,440 INFO L93 Difference]: Finished difference Result 168583 states and 197637 transitions. [2021-11-09 09:50:48,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:50:48,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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 367 [2021-11-09 09:50:48,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:48,570 INFO L225 Difference]: With dead ends: 168583 [2021-11-09 09:50:48,570 INFO L226 Difference]: Without dead ends: 84685 [2021-11-09 09:50:48,612 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:50:48,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84685 states. [2021-11-09 09:50:49,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84685 to 83897. [2021-11-09 09:50:49,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83897 states, 83896 states have (on average 1.1277891675407647) internal successors, (94617), 83896 states have internal predecessors, (94617), 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) [2021-11-09 09:50:50,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83897 states to 83897 states and 94617 transitions. [2021-11-09 09:50:50,131 INFO L78 Accepts]: Start accepts. Automaton has 83897 states and 94617 transitions. Word has length 367 [2021-11-09 09:50:50,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:50,132 INFO L470 AbstractCegarLoop]: Abstraction has 83897 states and 94617 transitions. [2021-11-09 09:50:50,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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) [2021-11-09 09:50:50,132 INFO L276 IsEmpty]: Start isEmpty. Operand 83897 states and 94617 transitions. [2021-11-09 09:50:50,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2021-11-09 09:50:50,479 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:50,479 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:50,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c37f2c-153f-4bd1-8637-6c1221dae5cd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-09 09:50:50,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c37f2c-153f-4bd1-8637-6c1221dae5cd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:50:50,680 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:50,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:50,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1731675346, now seen corresponding path program 1 times [2021-11-09 09:50:50,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:50,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024729967] [2021-11-09 09:50:50,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:50,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:50,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:51,006 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 484 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-11-09 09:50:51,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:51,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024729967] [2021-11-09 09:50:51,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024729967] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:50:51,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:50:51,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:50:51,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616207714] [2021-11-09 09:50:51,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:50:51,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:51,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:50:51,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:50:51,014 INFO L87 Difference]: Start difference. First operand 83897 states and 94617 transitions. Second operand has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 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) [2021-11-09 09:50:57,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:50:57,225 INFO L93 Difference]: Finished difference Result 192985 states and 220141 transitions. [2021-11-09 09:50:57,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:50:57,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 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 397 [2021-11-09 09:50:57,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:50:57,382 INFO L225 Difference]: With dead ends: 192985 [2021-11-09 09:50:57,382 INFO L226 Difference]: Without dead ends: 109877 [2021-11-09 09:50:57,418 INFO L786 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 [2021-11-09 09:50:57,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109877 states. [2021-11-09 09:50:58,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109877 to 108283. [2021-11-09 09:50:59,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108283 states, 108282 states have (on average 1.1321364585064924) internal successors, (122590), 108282 states have internal predecessors, (122590), 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) [2021-11-09 09:50:59,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108283 states to 108283 states and 122590 transitions. [2021-11-09 09:50:59,187 INFO L78 Accepts]: Start accepts. Automaton has 108283 states and 122590 transitions. Word has length 397 [2021-11-09 09:50:59,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:50:59,188 INFO L470 AbstractCegarLoop]: Abstraction has 108283 states and 122590 transitions. [2021-11-09 09:50:59,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 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) [2021-11-09 09:50:59,189 INFO L276 IsEmpty]: Start isEmpty. Operand 108283 states and 122590 transitions. [2021-11-09 09:50:59,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2021-11-09 09:50:59,201 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:50:59,202 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:50:59,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 09:50:59,202 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:50:59,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:50:59,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1783059347, now seen corresponding path program 1 times [2021-11-09 09:50:59,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:50:59,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554841488] [2021-11-09 09:50:59,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:50:59,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:50:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:50:59,439 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 382 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-09 09:50:59,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:50:59,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554841488] [2021-11-09 09:50:59,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554841488] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:50:59,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:50:59,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:50:59,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197045324] [2021-11-09 09:50:59,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:50:59,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:50:59,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:50:59,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:50:59,443 INFO L87 Difference]: Start difference. First operand 108283 states and 122590 transitions. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 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) [2021-11-09 09:51:06,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:06,278 INFO L93 Difference]: Finished difference Result 241763 states and 276153 transitions. [2021-11-09 09:51:06,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:51:06,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 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 435 [2021-11-09 09:51:06,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:06,489 INFO L225 Difference]: With dead ends: 241763 [2021-11-09 09:51:06,489 INFO L226 Difference]: Without dead ends: 134269 [2021-11-09 09:51:06,539 INFO L786 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 [2021-11-09 09:51:06,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134269 states. [2021-11-09 09:51:08,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134269 to 134252. [2021-11-09 09:51:08,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134252 states, 134251 states have (on average 1.1154032372198346) internal successors, (149744), 134251 states have internal predecessors, (149744), 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) [2021-11-09 09:51:08,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134252 states to 134252 states and 149744 transitions. [2021-11-09 09:51:08,860 INFO L78 Accepts]: Start accepts. Automaton has 134252 states and 149744 transitions. Word has length 435 [2021-11-09 09:51:08,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:08,861 INFO L470 AbstractCegarLoop]: Abstraction has 134252 states and 149744 transitions. [2021-11-09 09:51:08,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 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) [2021-11-09 09:51:08,861 INFO L276 IsEmpty]: Start isEmpty. Operand 134252 states and 149744 transitions. [2021-11-09 09:51:08,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2021-11-09 09:51:08,877 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:08,877 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 09:51:08,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 09:51:08,878 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:08,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:08,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1750126426, now seen corresponding path program 1 times [2021-11-09 09:51:08,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:08,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534721760] [2021-11-09 09:51:08,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:08,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:09,304 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 318 proven. 110 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-09 09:51:09,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:09,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534721760] [2021-11-09 09:51:09,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534721760] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:09,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62104252] [2021-11-09 09:51:09,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:09,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:09,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c37f2c-153f-4bd1-8637-6c1221dae5cd/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:09,309 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c37f2c-153f-4bd1-8637-6c1221dae5cd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:09,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c37f2c-153f-4bd1-8637-6c1221dae5cd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:51:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:09,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 09:51:09,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 354 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-09 09:51:11,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62104252] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:51:11,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:51:11,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-11-09 09:51:11,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995105677] [2021-11-09 09:51:11,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:51:11,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:11,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:51:11,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:51:11,222 INFO L87 Difference]: Start difference. First operand 134252 states and 149744 transitions. Second operand has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 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) [2021-11-09 09:51:17,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:17,774 INFO L93 Difference]: Finished difference Result 261381 states and 293523 transitions. [2021-11-09 09:51:17,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:51:17,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 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 471 [2021-11-09 09:51:17,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:18,024 INFO L225 Difference]: With dead ends: 261381 [2021-11-09 09:51:18,025 INFO L226 Difference]: Without dead ends: 143666 [2021-11-09 09:51:18,105 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:51:18,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143666 states. [2021-11-09 09:51:19,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143666 to 143666. [2021-11-09 09:51:20,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143666 states, 143665 states have (on average 1.110381790972053) internal successors, (159523), 143665 states have internal predecessors, (159523), 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) [2021-11-09 09:51:20,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143666 states to 143666 states and 159523 transitions. [2021-11-09 09:51:20,902 INFO L78 Accepts]: Start accepts. Automaton has 143666 states and 159523 transitions. Word has length 471 [2021-11-09 09:51:20,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:20,904 INFO L470 AbstractCegarLoop]: Abstraction has 143666 states and 159523 transitions. [2021-11-09 09:51:20,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 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) [2021-11-09 09:51:20,904 INFO L276 IsEmpty]: Start isEmpty. Operand 143666 states and 159523 transitions. [2021-11-09 09:51:20,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2021-11-09 09:51:20,930 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:20,931 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:20,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c37f2c-153f-4bd1-8637-6c1221dae5cd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-09 09:51:21,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c37f2c-153f-4bd1-8637-6c1221dae5cd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:21,149 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:21,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:21,150 INFO L85 PathProgramCache]: Analyzing trace with hash -274368295, now seen corresponding path program 1 times [2021-11-09 09:51:21,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:21,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064235263] [2021-11-09 09:51:21,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:21,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:21,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:21,721 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 242 proven. 110 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-09 09:51:21,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:21,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064235263] [2021-11-09 09:51:21,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064235263] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:51:21,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135900858] [2021-11-09 09:51:21,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:21,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:51:21,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c37f2c-153f-4bd1-8637-6c1221dae5cd/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:51:21,730 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c37f2c-153f-4bd1-8637-6c1221dae5cd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:51:21,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c37f2c-153f-4bd1-8637-6c1221dae5cd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:51:22,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:22,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 09:51:22,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:51:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 228 proven. 0 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-11-09 09:51:26,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135900858] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:51:26,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:51:26,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-09 09:51:26,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515247146] [2021-11-09 09:51:26,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:51:26,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:26,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:51:26,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:51:26,004 INFO L87 Difference]: Start difference. First operand 143666 states and 159523 transitions. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 2 states have internal predecessors, (345), 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) [2021-11-09 09:51:31,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:31,160 INFO L93 Difference]: Finished difference Result 274744 states and 305966 transitions. [2021-11-09 09:51:31,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:51:31,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 2 states have internal predecessors, (345), 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 506 [2021-11-09 09:51:31,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:31,855 INFO L225 Difference]: With dead ends: 274744 [2021-11-09 09:51:31,855 INFO L226 Difference]: Without dead ends: 147615 [2021-11-09 09:51:31,962 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:51:32,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147615 states. [2021-11-09 09:51:33,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147615 to 147605. [2021-11-09 09:51:33,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147605 states, 147604 states have (on average 1.108655591989377) internal successors, (163642), 147604 states have internal predecessors, (163642), 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) [2021-11-09 09:51:34,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147605 states to 147605 states and 163642 transitions. [2021-11-09 09:51:34,210 INFO L78 Accepts]: Start accepts. Automaton has 147605 states and 163642 transitions. Word has length 506 [2021-11-09 09:51:34,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:34,211 INFO L470 AbstractCegarLoop]: Abstraction has 147605 states and 163642 transitions. [2021-11-09 09:51:34,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 2 states have internal predecessors, (345), 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) [2021-11-09 09:51:34,212 INFO L276 IsEmpty]: Start isEmpty. Operand 147605 states and 163642 transitions. [2021-11-09 09:51:34,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2021-11-09 09:51:34,230 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:34,231 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2021-11-09 09:51:34,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c37f2c-153f-4bd1-8637-6c1221dae5cd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:51:34,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c37f2c-153f-4bd1-8637-6c1221dae5cd/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 09:51:34,432 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:34,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:34,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1583154431, now seen corresponding path program 1 times [2021-11-09 09:51:34,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:34,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118863197] [2021-11-09 09:51:34,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:34,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:34,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:34,738 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 757 trivial. 0 not checked. [2021-11-09 09:51:34,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:34,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118863197] [2021-11-09 09:51:34,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118863197] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:51:34,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:51:34,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:51:34,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357475750] [2021-11-09 09:51:34,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:51:34,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:34,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:51:34,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:51:34,742 INFO L87 Difference]: Start difference. First operand 147605 states and 163642 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 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) [2021-11-09 09:51:38,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:38,912 INFO L93 Difference]: Finished difference Result 277082 states and 307974 transitions. [2021-11-09 09:51:38,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:51:38,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 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 526 [2021-11-09 09:51:38,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:39,125 INFO L225 Difference]: With dead ends: 277082 [2021-11-09 09:51:39,125 INFO L226 Difference]: Without dead ends: 146014 [2021-11-09 09:51:39,187 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:51:39,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146014 states. [2021-11-09 09:51:41,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146014 to 146013. [2021-11-09 09:51:42,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146013 states, 146012 states have (on average 1.1066350710900474) internal successors, (161582), 146012 states have internal predecessors, (161582), 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) [2021-11-09 09:51:42,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146013 states to 146013 states and 161582 transitions. [2021-11-09 09:51:42,240 INFO L78 Accepts]: Start accepts. Automaton has 146013 states and 161582 transitions. Word has length 526 [2021-11-09 09:51:42,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:42,242 INFO L470 AbstractCegarLoop]: Abstraction has 146013 states and 161582 transitions. [2021-11-09 09:51:42,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 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) [2021-11-09 09:51:42,243 INFO L276 IsEmpty]: Start isEmpty. Operand 146013 states and 161582 transitions. [2021-11-09 09:51:42,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 565 [2021-11-09 09:51:42,274 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:42,275 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:42,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 09:51:42,275 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:42,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:42,276 INFO L85 PathProgramCache]: Analyzing trace with hash 89916656, now seen corresponding path program 1 times [2021-11-09 09:51:42,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:42,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354511622] [2021-11-09 09:51:42,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:42,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:51:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:51:42,564 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 784 proven. 0 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-09 09:51:42,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:51:42,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354511622] [2021-11-09 09:51:42,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354511622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:51:42,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:51:42,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:51:42,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932201088] [2021-11-09 09:51:42,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:51:42,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:51:42,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:51:42,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:51:42,568 INFO L87 Difference]: Start difference. First operand 146013 states and 161582 transitions. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 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) [2021-11-09 09:51:48,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:51:48,140 INFO L93 Difference]: Finished difference Result 291244 states and 322385 transitions. [2021-11-09 09:51:48,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:51:48,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 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 564 [2021-11-09 09:51:48,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:51:48,331 INFO L225 Difference]: With dead ends: 291244 [2021-11-09 09:51:48,331 INFO L226 Difference]: Without dead ends: 146020 [2021-11-09 09:51:48,396 INFO L786 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 [2021-11-09 09:51:48,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146020 states. [2021-11-09 09:51:50,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146020 to 146006. [2021-11-09 09:51:50,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146006 states, 146005 states have (on average 1.0816273415293998) internal successors, (157923), 146005 states have internal predecessors, (157923), 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) [2021-11-09 09:51:51,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146006 states to 146006 states and 157923 transitions. [2021-11-09 09:51:51,244 INFO L78 Accepts]: Start accepts. Automaton has 146006 states and 157923 transitions. Word has length 564 [2021-11-09 09:51:51,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:51:51,245 INFO L470 AbstractCegarLoop]: Abstraction has 146006 states and 157923 transitions. [2021-11-09 09:51:51,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 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) [2021-11-09 09:51:51,245 INFO L276 IsEmpty]: Start isEmpty. Operand 146006 states and 157923 transitions. [2021-11-09 09:51:51,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2021-11-09 09:51:51,268 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:51:51,269 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:51:51,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 09:51:51,269 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:51:51,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:51:51,270 INFO L85 PathProgramCache]: Analyzing trace with hash 2113284322, now seen corresponding path program 1 times [2021-11-09 09:51:51,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:51:51,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257362908] [2021-11-09 09:51:51,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:51:51,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms