./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.06.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.06.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 54f526c05851bf34c26c8de127e86052a91be3d9e5ccf7068c1070e69b950b3c --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 20:57:16,201 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 20:57:16,203 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 20:57:16,226 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 20:57:16,226 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 20:57:16,227 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 20:57:16,229 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 20:57:16,230 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 20:57:16,232 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 20:57:16,233 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 20:57:16,234 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 20:57:16,235 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 20:57:16,235 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 20:57:16,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 20:57:16,237 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 20:57:16,238 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 20:57:16,239 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 20:57:16,240 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 20:57:16,242 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 20:57:16,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 20:57:16,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 20:57:16,247 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 20:57:16,248 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 20:57:16,249 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 20:57:16,251 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 20:57:16,252 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 20:57:16,252 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 20:57:16,253 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 20:57:16,253 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 20:57:16,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 20:57:16,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 20:57:16,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 20:57:16,256 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 20:57:16,257 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 20:57:16,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 20:57:16,258 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 20:57:16,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 20:57:16,259 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 20:57:16,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 20:57:16,260 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 20:57:16,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 20:57:16,261 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 20:57:16,290 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 20:57:16,290 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 20:57:16,291 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 20:57:16,291 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 20:57:16,291 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 20:57:16,291 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 20:57:16,292 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 20:57:16,292 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 20:57:16,292 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 20:57:16,292 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 20:57:16,292 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 20:57:16,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 20:57:16,293 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 20:57:16,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 20:57:16,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 20:57:16,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 20:57:16,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 20:57:16,293 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 20:57:16,293 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 20:57:16,293 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 20:57:16,293 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 20:57:16,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 20:57:16,294 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 20:57:16,294 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 20:57:16,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:57:16,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 20:57:16,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 20:57:16,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 20:57:16,294 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 20:57:16,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 20:57:16,295 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 20:57:16,295 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 20:57:16,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 20:57:16,295 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 20:57:16,295 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_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54f526c05851bf34c26c8de127e86052a91be3d9e5ccf7068c1070e69b950b3c [2021-12-06 20:57:16,476 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 20:57:16,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 20:57:16,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 20:57:16,494 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 20:57:16,494 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 20:57:16,495 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.06.cil-2.c [2021-12-06 20:57:16,535 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/data/3ad915c61/d9dda9118e444a5bb488d121fb4466b5/FLAGc01cdf55b [2021-12-06 20:57:17,244 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 20:57:17,244 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/sv-benchmarks/c/combinations/Problem05_label45+token_ring.06.cil-2.c [2021-12-06 20:57:17,282 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/data/3ad915c61/d9dda9118e444a5bb488d121fb4466b5/FLAGc01cdf55b [2021-12-06 20:57:17,567 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/data/3ad915c61/d9dda9118e444a5bb488d121fb4466b5 [2021-12-06 20:57:17,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 20:57:17,571 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 20:57:17,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 20:57:17,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 20:57:17,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 20:57:17,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:57:17" (1/1) ... [2021-12-06 20:57:17,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17ff878f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:17, skipping insertion in model container [2021-12-06 20:57:17,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:57:17" (1/1) ... [2021-12-06 20:57:17,584 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 20:57:17,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:57:19,119 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/sv-benchmarks/c/combinations/Problem05_label45+token_ring.06.cil-2.c[380323,380336] [2021-12-06 20:57:19,142 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/sv-benchmarks/c/combinations/Problem05_label45+token_ring.06.cil-2.c[383339,383352] [2021-12-06 20:57:19,317 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:57:19,324 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 20:57:20,101 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/sv-benchmarks/c/combinations/Problem05_label45+token_ring.06.cil-2.c[380323,380336] [2021-12-06 20:57:20,105 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/sv-benchmarks/c/combinations/Problem05_label45+token_ring.06.cil-2.c[383339,383352] [2021-12-06 20:57:20,115 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:57:20,163 INFO L208 MainTranslator]: Completed translation [2021-12-06 20:57:20,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:20 WrapperNode [2021-12-06 20:57:20,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 20:57:20,164 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 20:57:20,164 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 20:57:20,164 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 20:57:20,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:20" (1/1) ... [2021-12-06 20:57:20,221 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:20" (1/1) ... [2021-12-06 20:57:20,465 INFO L137 Inliner]: procedures = 56, calls = 59, calls flagged for inlining = 34, calls inlined = 34, statements flattened = 12851 [2021-12-06 20:57:20,466 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 20:57:20,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 20:57:20,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 20:57:20,466 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 20:57:20,473 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:20" (1/1) ... [2021-12-06 20:57:20,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:20" (1/1) ... [2021-12-06 20:57:20,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:20" (1/1) ... [2021-12-06 20:57:20,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:20" (1/1) ... [2021-12-06 20:57:20,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:20" (1/1) ... [2021-12-06 20:57:20,664 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:20" (1/1) ... [2021-12-06 20:57:20,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:20" (1/1) ... [2021-12-06 20:57:20,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 20:57:20,793 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 20:57:20,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 20:57:20,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 20:57:20,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:20" (1/1) ... [2021-12-06 20:57:20,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:57:20,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:57:20,827 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 20:57:20,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 20:57:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 20:57:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-06 20:57:20,865 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-06 20:57:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-06 20:57:20,865 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-06 20:57:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-06 20:57:20,866 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-06 20:57:20,866 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-06 20:57:20,866 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-06 20:57:20,866 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-06 20:57:20,866 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-06 20:57:20,866 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-06 20:57:20,866 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-06 20:57:20,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 20:57:20,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 20:57:20,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 20:57:20,966 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 20:57:20,968 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 20:57:25,082 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 20:57:25,107 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 20:57:25,107 INFO L301 CfgBuilder]: Removed 10 assume(true) statements. [2021-12-06 20:57:25,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:57:25 BoogieIcfgContainer [2021-12-06 20:57:25,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 20:57:25,113 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 20:57:25,113 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 20:57:25,115 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 20:57:25,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 08:57:17" (1/3) ... [2021-12-06 20:57:25,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1569dcbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:57:25, skipping insertion in model container [2021-12-06 20:57:25,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:57:20" (2/3) ... [2021-12-06 20:57:25,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1569dcbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:57:25, skipping insertion in model container [2021-12-06 20:57:25,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:57:25" (3/3) ... [2021-12-06 20:57:25,117 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.06.cil-2.c [2021-12-06 20:57:25,121 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 20:57:25,121 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 20:57:25,174 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 20:57:25,181 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 20:57:25,181 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 20:57:25,239 INFO L276 IsEmpty]: Start isEmpty. Operand has 2415 states, 2386 states have (on average 1.8512154233025986) internal successors, (4417), 2389 states have internal predecessors, (4417), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-06 20:57:25,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 20:57:25,252 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:25,253 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:25,253 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:57:25,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:25,258 INFO L85 PathProgramCache]: Analyzing trace with hash -72843931, now seen corresponding path program 1 times [2021-12-06 20:57:25,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:25,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560608754] [2021-12-06 20:57:25,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:25,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:25,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:25,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:57:25,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:25,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 20:57:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:25,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 20:57:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:25,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 20:57:25,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:25,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 20:57:25,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:25,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:25,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:25,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560608754] [2021-12-06 20:57:25,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560608754] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:25,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:25,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:57:25,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928190084] [2021-12-06 20:57:25,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:25,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:57:25,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:25,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:57:25,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:57:25,609 INFO L87 Difference]: Start difference. First operand has 2415 states, 2386 states have (on average 1.8512154233025986) internal successors, (4417), 2389 states have internal predecessors, (4417), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:57:26,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:26,378 INFO L93 Difference]: Finished difference Result 4896 states and 9026 transitions. [2021-12-06 20:57:26,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:57:26,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2021-12-06 20:57:26,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:26,410 INFO L225 Difference]: With dead ends: 4896 [2021-12-06 20:57:26,410 INFO L226 Difference]: Without dead ends: 2424 [2021-12-06 20:57:26,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:57:26,423 INFO L933 BasicCegarLoop]: 4405 mSDtfsCounter, 582 mSDsluCounter, 12323 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 16728 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:26,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 16728 Invalid, 440 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [50 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:57:26,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2424 states. [2021-12-06 20:57:26,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2424 to 2348. [2021-12-06 20:57:26,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2348 states, 2320 states have (on average 1.8387931034482758) internal successors, (4266), 2322 states have internal predecessors, (4266), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-06 20:57:26,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2348 states to 2348 states and 4306 transitions. [2021-12-06 20:57:26,564 INFO L78 Accepts]: Start accepts. Automaton has 2348 states and 4306 transitions. Word has length 112 [2021-12-06 20:57:26,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:26,564 INFO L470 AbstractCegarLoop]: Abstraction has 2348 states and 4306 transitions. [2021-12-06 20:57:26,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:57:26,565 INFO L276 IsEmpty]: Start isEmpty. Operand 2348 states and 4306 transitions. [2021-12-06 20:57:26,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 20:57:26,568 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:26,568 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:26,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 20:57:26,568 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:57:26,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:26,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1103884829, now seen corresponding path program 1 times [2021-12-06 20:57:26,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:26,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357416122] [2021-12-06 20:57:26,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:26,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:26,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:26,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:57:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:26,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 20:57:26,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:26,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 20:57:26,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:26,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 20:57:26,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:26,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 20:57:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:26,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:26,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:26,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357416122] [2021-12-06 20:57:26,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357416122] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:26,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:26,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:57:26,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597014440] [2021-12-06 20:57:26,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:26,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:57:26,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:26,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:57:26,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:57:26,731 INFO L87 Difference]: Start difference. First operand 2348 states and 4306 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:57:27,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:27,562 INFO L93 Difference]: Finished difference Result 2651 states and 4792 transitions. [2021-12-06 20:57:27,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 20:57:27,562 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2021-12-06 20:57:27,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:27,577 INFO L225 Difference]: With dead ends: 2651 [2021-12-06 20:57:27,577 INFO L226 Difference]: Without dead ends: 2438 [2021-12-06 20:57:27,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-06 20:57:27,580 INFO L933 BasicCegarLoop]: 4325 mSDtfsCounter, 4580 mSDsluCounter, 16381 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4594 SdHoareTripleChecker+Valid, 20706 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:27,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4594 Valid, 20706 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 20:57:27,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2021-12-06 20:57:27,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 2348. [2021-12-06 20:57:27,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2348 states, 2320 states have (on average 1.8383620689655173) internal successors, (4265), 2322 states have internal predecessors, (4265), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-06 20:57:27,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2348 states to 2348 states and 4305 transitions. [2021-12-06 20:57:27,639 INFO L78 Accepts]: Start accepts. Automaton has 2348 states and 4305 transitions. Word has length 112 [2021-12-06 20:57:27,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:27,640 INFO L470 AbstractCegarLoop]: Abstraction has 2348 states and 4305 transitions. [2021-12-06 20:57:27,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:57:27,640 INFO L276 IsEmpty]: Start isEmpty. Operand 2348 states and 4305 transitions. [2021-12-06 20:57:27,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 20:57:27,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:27,642 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:27,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 20:57:27,642 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:57:27,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:27,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1572107553, now seen corresponding path program 1 times [2021-12-06 20:57:27,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:27,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431348284] [2021-12-06 20:57:27,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:27,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:27,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:57:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:27,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 20:57:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:27,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 20:57:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:27,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 20:57:27,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:27,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 20:57:27,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:27,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:27,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431348284] [2021-12-06 20:57:27,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431348284] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:27,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:27,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:57:27,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487697991] [2021-12-06 20:57:27,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:27,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:57:27,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:27,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:57:27,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:57:27,800 INFO L87 Difference]: Start difference. First operand 2348 states and 4305 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:57:29,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:29,047 INFO L93 Difference]: Finished difference Result 2943 states and 5254 transitions. [2021-12-06 20:57:29,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 20:57:29,048 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2021-12-06 20:57:29,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:29,061 INFO L225 Difference]: With dead ends: 2943 [2021-12-06 20:57:29,061 INFO L226 Difference]: Without dead ends: 2730 [2021-12-06 20:57:29,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 20:57:29,063 INFO L933 BasicCegarLoop]: 4509 mSDtfsCounter, 4793 mSDsluCounter, 16986 mSDsCounter, 0 mSdLazyCounter, 1716 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4806 SdHoareTripleChecker+Valid, 21495 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:29,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4806 Valid, 21495 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1716 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 20:57:29,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2730 states. [2021-12-06 20:57:29,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2730 to 2571. [2021-12-06 20:57:29,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2571 states, 2518 states have (on average 1.8165210484511518) internal successors, (4574), 2522 states have internal predecessors, (4574), 37 states have call successors, (37), 12 states have call predecessors, (37), 14 states have return successors, (44), 38 states have call predecessors, (44), 37 states have call successors, (44) [2021-12-06 20:57:29,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2571 states to 2571 states and 4655 transitions. [2021-12-06 20:57:29,128 INFO L78 Accepts]: Start accepts. Automaton has 2571 states and 4655 transitions. Word has length 112 [2021-12-06 20:57:29,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:29,129 INFO L470 AbstractCegarLoop]: Abstraction has 2571 states and 4655 transitions. [2021-12-06 20:57:29,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:57:29,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2571 states and 4655 transitions. [2021-12-06 20:57:29,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 20:57:29,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:29,131 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:29,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 20:57:29,131 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:57:29,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:29,131 INFO L85 PathProgramCache]: Analyzing trace with hash 688598563, now seen corresponding path program 1 times [2021-12-06 20:57:29,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:29,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599128454] [2021-12-06 20:57:29,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:29,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:29,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:29,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:57:29,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:29,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 20:57:29,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:29,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 20:57:29,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:29,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 20:57:29,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:29,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 20:57:29,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:29,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:29,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599128454] [2021-12-06 20:57:29,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599128454] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:29,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:29,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:57:29,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80614293] [2021-12-06 20:57:29,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:29,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:57:29,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:29,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:57:29,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:57:29,228 INFO L87 Difference]: Start difference. First operand 2571 states and 4655 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:57:30,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:30,414 INFO L93 Difference]: Finished difference Result 3701 states and 6440 transitions. [2021-12-06 20:57:30,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 20:57:30,414 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2021-12-06 20:57:30,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:30,429 INFO L225 Difference]: With dead ends: 3701 [2021-12-06 20:57:30,430 INFO L226 Difference]: Without dead ends: 3267 [2021-12-06 20:57:30,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 20:57:30,433 INFO L933 BasicCegarLoop]: 4528 mSDtfsCounter, 4771 mSDsluCounter, 16994 mSDsCounter, 0 mSdLazyCounter, 1785 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4784 SdHoareTripleChecker+Valid, 21522 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:30,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4784 Valid, 21522 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1785 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 20:57:30,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3267 states. [2021-12-06 20:57:30,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3267 to 2982. [2021-12-06 20:57:30,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2885 states have (on average 1.7805892547660311) internal successors, (5137), 2891 states have internal predecessors, (5137), 67 states have call successors, (67), 24 states have call predecessors, (67), 28 states have return successors, (84), 70 states have call predecessors, (84), 67 states have call successors, (84) [2021-12-06 20:57:30,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 5288 transitions. [2021-12-06 20:57:30,513 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 5288 transitions. Word has length 112 [2021-12-06 20:57:30,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:30,513 INFO L470 AbstractCegarLoop]: Abstraction has 2982 states and 5288 transitions. [2021-12-06 20:57:30,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:57:30,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 5288 transitions. [2021-12-06 20:57:30,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 20:57:30,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:30,515 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:30,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 20:57:30,516 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:57:30,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:30,516 INFO L85 PathProgramCache]: Analyzing trace with hash 660098273, now seen corresponding path program 1 times [2021-12-06 20:57:30,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:30,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31281885] [2021-12-06 20:57:30,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:30,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:30,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:57:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:30,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 20:57:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:30,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 20:57:30,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:30,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 20:57:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:30,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 20:57:30,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:30,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:30,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:30,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31281885] [2021-12-06 20:57:30,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31281885] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:30,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:30,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:57:30,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637728813] [2021-12-06 20:57:30,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:30,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:57:30,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:30,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:57:30,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:57:30,603 INFO L87 Difference]: Start difference. First operand 2982 states and 5288 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:57:31,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:31,977 INFO L93 Difference]: Finished difference Result 5184 states and 8757 transitions. [2021-12-06 20:57:31,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 20:57:31,977 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2021-12-06 20:57:31,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:31,997 INFO L225 Difference]: With dead ends: 5184 [2021-12-06 20:57:31,997 INFO L226 Difference]: Without dead ends: 4339 [2021-12-06 20:57:32,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 20:57:32,002 INFO L933 BasicCegarLoop]: 4524 mSDtfsCounter, 4771 mSDsluCounter, 16994 mSDsCounter, 0 mSdLazyCounter, 1777 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4784 SdHoareTripleChecker+Valid, 21518 SdHoareTripleChecker+Invalid, 1850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:32,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4784 Valid, 21518 Invalid, 1850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1777 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 20:57:32,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4339 states. [2021-12-06 20:57:32,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4339 to 3807. [2021-12-06 20:57:32,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3807 states, 3622 states have (on average 1.7302595251242407) internal successors, (6267), 3632 states have internal predecessors, (6267), 127 states have call successors, (127), 48 states have call predecessors, (127), 56 states have return successors, (170), 134 states have call predecessors, (170), 127 states have call successors, (170) [2021-12-06 20:57:32,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3807 states to 3807 states and 6564 transitions. [2021-12-06 20:57:32,111 INFO L78 Accepts]: Start accepts. Automaton has 3807 states and 6564 transitions. Word has length 112 [2021-12-06 20:57:32,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:32,112 INFO L470 AbstractCegarLoop]: Abstraction has 3807 states and 6564 transitions. [2021-12-06 20:57:32,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:57:32,112 INFO L276 IsEmpty]: Start isEmpty. Operand 3807 states and 6564 transitions. [2021-12-06 20:57:32,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 20:57:32,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:32,114 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:32,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 20:57:32,115 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:57:32,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:32,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1280483741, now seen corresponding path program 1 times [2021-12-06 20:57:32,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:32,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957237734] [2021-12-06 20:57:32,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:32,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:32,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:32,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:57:32,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:32,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 20:57:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:32,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 20:57:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:32,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 20:57:32,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:32,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 20:57:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:32,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:32,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957237734] [2021-12-06 20:57:32,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957237734] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:32,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:32,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:57:32,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48919161] [2021-12-06 20:57:32,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:32,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:57:32,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:32,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:57:32,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:57:32,203 INFO L87 Difference]: Start difference. First operand 3807 states and 6564 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:57:32,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:32,900 INFO L93 Difference]: Finished difference Result 6031 states and 10100 transitions. [2021-12-06 20:57:32,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 20:57:32,900 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2021-12-06 20:57:32,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:32,919 INFO L225 Difference]: With dead ends: 6031 [2021-12-06 20:57:32,919 INFO L226 Difference]: Without dead ends: 4359 [2021-12-06 20:57:32,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-06 20:57:32,924 INFO L933 BasicCegarLoop]: 4311 mSDtfsCounter, 4581 mSDsluCounter, 16380 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4595 SdHoareTripleChecker+Valid, 20691 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:32,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4595 Valid, 20691 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:57:32,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4359 states. [2021-12-06 20:57:33,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4359 to 3807. [2021-12-06 20:57:33,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3807 states, 3622 states have (on average 1.7277747101049143) internal successors, (6258), 3632 states have internal predecessors, (6258), 127 states have call successors, (127), 48 states have call predecessors, (127), 56 states have return successors, (170), 134 states have call predecessors, (170), 127 states have call successors, (170) [2021-12-06 20:57:33,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3807 states to 3807 states and 6555 transitions. [2021-12-06 20:57:33,030 INFO L78 Accepts]: Start accepts. Automaton has 3807 states and 6555 transitions. Word has length 112 [2021-12-06 20:57:33,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:33,030 INFO L470 AbstractCegarLoop]: Abstraction has 3807 states and 6555 transitions. [2021-12-06 20:57:33,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:57:33,030 INFO L276 IsEmpty]: Start isEmpty. Operand 3807 states and 6555 transitions. [2021-12-06 20:57:33,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 20:57:33,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:33,033 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:33,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 20:57:33,033 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:57:33,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:33,033 INFO L85 PathProgramCache]: Analyzing trace with hash 596579489, now seen corresponding path program 1 times [2021-12-06 20:57:33,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:33,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810327345] [2021-12-06 20:57:33,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:33,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:33,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:33,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:57:33,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:33,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 20:57:33,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:33,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 20:57:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:33,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 20:57:33,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:33,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 20:57:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:33,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:33,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810327345] [2021-12-06 20:57:33,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810327345] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:33,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:33,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:57:33,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133583357] [2021-12-06 20:57:33,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:33,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:57:33,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:33,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:57:33,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:57:33,109 INFO L87 Difference]: Start difference. First operand 3807 states and 6555 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:57:33,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:33,741 INFO L93 Difference]: Finished difference Result 6022 states and 10057 transitions. [2021-12-06 20:57:33,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 20:57:33,742 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2021-12-06 20:57:33,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:33,761 INFO L225 Difference]: With dead ends: 6022 [2021-12-06 20:57:33,761 INFO L226 Difference]: Without dead ends: 4350 [2021-12-06 20:57:33,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-06 20:57:33,766 INFO L933 BasicCegarLoop]: 4307 mSDtfsCounter, 4672 mSDsluCounter, 12306 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4686 SdHoareTripleChecker+Valid, 16613 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:33,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4686 Valid, 16613 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:57:33,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4350 states. [2021-12-06 20:57:33,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4350 to 3807. [2021-12-06 20:57:33,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3807 states, 3622 states have (on average 1.7252898950855882) internal successors, (6249), 3632 states have internal predecessors, (6249), 127 states have call successors, (127), 48 states have call predecessors, (127), 56 states have return successors, (170), 134 states have call predecessors, (170), 127 states have call successors, (170) [2021-12-06 20:57:33,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3807 states to 3807 states and 6546 transitions. [2021-12-06 20:57:33,870 INFO L78 Accepts]: Start accepts. Automaton has 3807 states and 6546 transitions. Word has length 112 [2021-12-06 20:57:33,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:33,870 INFO L470 AbstractCegarLoop]: Abstraction has 3807 states and 6546 transitions. [2021-12-06 20:57:33,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:57:33,871 INFO L276 IsEmpty]: Start isEmpty. Operand 3807 states and 6546 transitions. [2021-12-06 20:57:33,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 20:57:33,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:33,873 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:33,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 20:57:33,874 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:57:33,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:33,874 INFO L85 PathProgramCache]: Analyzing trace with hash -174154077, now seen corresponding path program 1 times [2021-12-06 20:57:33,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:33,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200407896] [2021-12-06 20:57:33,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:33,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:33,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:33,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:57:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:33,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 20:57:33,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:33,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 20:57:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:33,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 20:57:33,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:33,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 20:57:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:33,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:33,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:33,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200407896] [2021-12-06 20:57:33,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200407896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:33,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:33,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:57:33,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235775973] [2021-12-06 20:57:33,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:33,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:57:33,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:33,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:57:33,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:57:33,945 INFO L87 Difference]: Start difference. First operand 3807 states and 6546 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:57:35,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:35,333 INFO L93 Difference]: Finished difference Result 8873 states and 14409 transitions. [2021-12-06 20:57:35,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 20:57:35,333 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2021-12-06 20:57:35,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:35,363 INFO L225 Difference]: With dead ends: 8873 [2021-12-06 20:57:35,363 INFO L226 Difference]: Without dead ends: 7203 [2021-12-06 20:57:35,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 20:57:35,370 INFO L933 BasicCegarLoop]: 4505 mSDtfsCounter, 5020 mSDsluCounter, 16986 mSDsCounter, 0 mSdLazyCounter, 1717 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5040 SdHoareTripleChecker+Valid, 21491 SdHoareTripleChecker+Invalid, 1798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:35,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5040 Valid, 21491 Invalid, 1798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1717 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 20:57:35,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7203 states. [2021-12-06 20:57:35,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7203 to 5454. [2021-12-06 20:57:35,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5454 states, 5101 states have (on average 1.666535973338561) internal successors, (8501), 5119 states have internal predecessors, (8501), 239 states have call successors, (239), 96 states have call predecessors, (239), 112 states have return successors, (352), 254 states have call predecessors, (352), 239 states have call successors, (352) [2021-12-06 20:57:35,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5454 states to 5454 states and 9092 transitions. [2021-12-06 20:57:35,573 INFO L78 Accepts]: Start accepts. Automaton has 5454 states and 9092 transitions. Word has length 112 [2021-12-06 20:57:35,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:35,573 INFO L470 AbstractCegarLoop]: Abstraction has 5454 states and 9092 transitions. [2021-12-06 20:57:35,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:57:35,573 INFO L276 IsEmpty]: Start isEmpty. Operand 5454 states and 9092 transitions. [2021-12-06 20:57:35,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 20:57:35,576 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:35,576 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:35,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 20:57:35,576 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:57:35,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:35,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1168847775, now seen corresponding path program 1 times [2021-12-06 20:57:35,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:35,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934621898] [2021-12-06 20:57:35,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:35,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:35,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:57:35,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:35,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 20:57:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:35,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 20:57:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:35,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 20:57:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:35,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 20:57:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:35,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:35,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:35,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934621898] [2021-12-06 20:57:35,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934621898] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:35,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:35,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:57:35,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54921440] [2021-12-06 20:57:35,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:35,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:57:35,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:35,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:57:35,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:57:35,659 INFO L87 Difference]: Start difference. First operand 5454 states and 9092 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:57:37,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:37,276 INFO L93 Difference]: Finished difference Result 15054 states and 24055 transitions. [2021-12-06 20:57:37,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 20:57:37,276 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2021-12-06 20:57:37,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:37,309 INFO L225 Difference]: With dead ends: 15054 [2021-12-06 20:57:37,309 INFO L226 Difference]: Without dead ends: 11737 [2021-12-06 20:57:37,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 20:57:37,319 INFO L933 BasicCegarLoop]: 4497 mSDtfsCounter, 4954 mSDsluCounter, 16986 mSDsCounter, 0 mSdLazyCounter, 1670 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4974 SdHoareTripleChecker+Valid, 21483 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:37,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4974 Valid, 21483 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1670 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 20:57:37,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11737 states. [2021-12-06 20:57:37,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11737 to 8755. [2021-12-06 20:57:37,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8755 states, 8074 states have (on average 1.6154322516720336) internal successors, (13043), 8108 states have internal predecessors, (13043), 455 states have call successors, (455), 192 states have call predecessors, (455), 224 states have return successors, (762), 486 states have call predecessors, (762), 455 states have call successors, (762) [2021-12-06 20:57:37,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8755 states to 8755 states and 14260 transitions. [2021-12-06 20:57:37,645 INFO L78 Accepts]: Start accepts. Automaton has 8755 states and 14260 transitions. Word has length 112 [2021-12-06 20:57:37,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:37,645 INFO L470 AbstractCegarLoop]: Abstraction has 8755 states and 14260 transitions. [2021-12-06 20:57:37,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:57:37,645 INFO L276 IsEmpty]: Start isEmpty. Operand 8755 states and 14260 transitions. [2021-12-06 20:57:37,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 20:57:37,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:37,650 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:37,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 20:57:37,650 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:57:37,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:37,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1167544735, now seen corresponding path program 1 times [2021-12-06 20:57:37,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:37,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38701586] [2021-12-06 20:57:37,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:37,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:37,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:57:37,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:37,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 20:57:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:37,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 20:57:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:37,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 20:57:37,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:37,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 20:57:37,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:37,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:37,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:37,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38701586] [2021-12-06 20:57:37,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38701586] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:37,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:37,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:57:37,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846097468] [2021-12-06 20:57:37,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:37,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:57:37,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:37,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:57:37,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:57:37,722 INFO L87 Difference]: Start difference. First operand 8755 states and 14260 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:57:39,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:39,750 INFO L93 Difference]: Finished difference Result 27325 states and 43401 transitions. [2021-12-06 20:57:39,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 20:57:39,750 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2021-12-06 20:57:39,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:39,801 INFO L225 Difference]: With dead ends: 27325 [2021-12-06 20:57:39,801 INFO L226 Difference]: Without dead ends: 20707 [2021-12-06 20:57:39,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 20:57:39,821 INFO L933 BasicCegarLoop]: 4474 mSDtfsCounter, 4927 mSDsluCounter, 16957 mSDsCounter, 0 mSdLazyCounter, 1627 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4947 SdHoareTripleChecker+Valid, 21431 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:39,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4947 Valid, 21431 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1627 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 20:57:39,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20707 states. [2021-12-06 20:57:40,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20707 to 15341. [2021-12-06 20:57:40,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15341 states, 14020 states have (on average 1.5793865905848787) internal successors, (22143), 14086 states have internal predecessors, (22143), 871 states have call successors, (871), 384 states have call predecessors, (871), 448 states have return successors, (1728), 934 states have call predecessors, (1728), 871 states have call successors, (1728) [2021-12-06 20:57:40,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15341 states to 15341 states and 24742 transitions. [2021-12-06 20:57:40,489 INFO L78 Accepts]: Start accepts. Automaton has 15341 states and 24742 transitions. Word has length 112 [2021-12-06 20:57:40,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:40,490 INFO L470 AbstractCegarLoop]: Abstraction has 15341 states and 24742 transitions. [2021-12-06 20:57:40,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:57:40,490 INFO L276 IsEmpty]: Start isEmpty. Operand 15341 states and 24742 transitions. [2021-12-06 20:57:40,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 20:57:40,497 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:40,498 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:40,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 20:57:40,498 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:57:40,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:40,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1250939743, now seen corresponding path program 1 times [2021-12-06 20:57:40,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:40,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610168559] [2021-12-06 20:57:40,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:40,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:40,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:40,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:57:40,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:40,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 20:57:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:40,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 20:57:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:40,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 20:57:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:40,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 20:57:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:40,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:40,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:40,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610168559] [2021-12-06 20:57:40,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610168559] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:40,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:40,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:57:40,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555320094] [2021-12-06 20:57:40,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:40,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:57:40,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:40,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:57:40,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:57:40,574 INFO L87 Difference]: Start difference. First operand 15341 states and 24742 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:57:43,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:43,592 INFO L93 Difference]: Finished difference Result 51275 states and 81797 transitions. [2021-12-06 20:57:43,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 20:57:43,592 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2021-12-06 20:57:43,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:43,691 INFO L225 Difference]: With dead ends: 51275 [2021-12-06 20:57:43,691 INFO L226 Difference]: Without dead ends: 38071 [2021-12-06 20:57:43,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 20:57:43,727 INFO L933 BasicCegarLoop]: 4531 mSDtfsCounter, 4805 mSDsluCounter, 16986 mSDsCounter, 0 mSdLazyCounter, 1828 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4817 SdHoareTripleChecker+Valid, 21517 SdHoareTripleChecker+Invalid, 1907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:43,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4817 Valid, 21517 Invalid, 1907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1828 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 20:57:43,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38071 states. [2021-12-06 20:57:45,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38071 to 28481. [2021-12-06 20:57:45,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28481 states, 25912 states have (on average 1.5581583822167335) internal successors, (40375), 26042 states have internal predecessors, (40375), 1671 states have call successors, (1671), 768 states have call predecessors, (1671), 896 states have return successors, (4114), 1798 states have call predecessors, (4114), 1671 states have call successors, (4114) [2021-12-06 20:57:45,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28481 states to 28481 states and 46160 transitions. [2021-12-06 20:57:45,132 INFO L78 Accepts]: Start accepts. Automaton has 28481 states and 46160 transitions. Word has length 112 [2021-12-06 20:57:45,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:45,133 INFO L470 AbstractCegarLoop]: Abstraction has 28481 states and 46160 transitions. [2021-12-06 20:57:45,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:57:45,133 INFO L276 IsEmpty]: Start isEmpty. Operand 28481 states and 46160 transitions. [2021-12-06 20:57:45,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 20:57:45,146 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:45,146 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:45,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 20:57:45,146 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:57:45,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:45,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1164896607, now seen corresponding path program 1 times [2021-12-06 20:57:45,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:45,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725574173] [2021-12-06 20:57:45,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:45,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:45,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:45,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:57:45,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:45,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 20:57:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:45,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 20:57:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:45,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 20:57:45,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:45,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 20:57:45,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:45,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:45,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:45,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725574173] [2021-12-06 20:57:45,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725574173] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:45,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:45,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:57:45,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106319265] [2021-12-06 20:57:45,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:45,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:57:45,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:45,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:57:45,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:57:45,218 INFO L87 Difference]: Start difference. First operand 28481 states and 46160 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:57:47,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:47,597 INFO L93 Difference]: Finished difference Result 61777 states and 101218 transitions. [2021-12-06 20:57:47,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 20:57:47,597 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2021-12-06 20:57:47,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:47,686 INFO L225 Difference]: With dead ends: 61777 [2021-12-06 20:57:47,686 INFO L226 Difference]: Without dead ends: 35431 [2021-12-06 20:57:47,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-06 20:57:47,727 INFO L933 BasicCegarLoop]: 4287 mSDtfsCounter, 4580 mSDsluCounter, 16378 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4594 SdHoareTripleChecker+Valid, 20665 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:47,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4594 Valid, 20665 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:57:47,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35431 states. [2021-12-06 20:57:49,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35431 to 28481. [2021-12-06 20:57:49,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28481 states, 25912 states have (on average 1.5531799938252546) internal successors, (40246), 26042 states have internal predecessors, (40246), 1671 states have call successors, (1671), 768 states have call predecessors, (1671), 896 states have return successors, (4114), 1798 states have call predecessors, (4114), 1671 states have call successors, (4114) [2021-12-06 20:57:49,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28481 states to 28481 states and 46031 transitions. [2021-12-06 20:57:49,191 INFO L78 Accepts]: Start accepts. Automaton has 28481 states and 46031 transitions. Word has length 112 [2021-12-06 20:57:49,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:49,192 INFO L470 AbstractCegarLoop]: Abstraction has 28481 states and 46031 transitions. [2021-12-06 20:57:49,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:57:49,192 INFO L276 IsEmpty]: Start isEmpty. Operand 28481 states and 46031 transitions. [2021-12-06 20:57:49,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 20:57:49,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:49,206 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:49,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 20:57:49,206 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:57:49,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:49,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1805214495, now seen corresponding path program 1 times [2021-12-06 20:57:49,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:49,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381761429] [2021-12-06 20:57:49,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:49,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:49,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:49,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:57:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:49,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 20:57:49,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:49,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 20:57:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:49,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 20:57:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:49,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 20:57:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:49,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:49,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:49,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381761429] [2021-12-06 20:57:49,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381761429] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:49,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:49,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 20:57:49,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445101285] [2021-12-06 20:57:49,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:49,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:57:49,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:49,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:57:49,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:57:49,281 INFO L87 Difference]: Start difference. First operand 28481 states and 46031 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:57:54,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:57:54,019 INFO L93 Difference]: Finished difference Result 96071 states and 155187 transitions. [2021-12-06 20:57:54,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 20:57:54,020 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2021-12-06 20:57:54,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:57:54,223 INFO L225 Difference]: With dead ends: 96071 [2021-12-06 20:57:54,223 INFO L226 Difference]: Without dead ends: 69727 [2021-12-06 20:57:54,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 20:57:54,285 INFO L933 BasicCegarLoop]: 4489 mSDtfsCounter, 4782 mSDsluCounter, 16986 mSDsCounter, 0 mSdLazyCounter, 1727 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4794 SdHoareTripleChecker+Valid, 21475 SdHoareTripleChecker+Invalid, 1804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:57:54,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4794 Valid, 21475 Invalid, 1804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1727 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 20:57:54,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69727 states. [2021-12-06 20:57:57,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69727 to 54825. [2021-12-06 20:57:57,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54825 states, 49824 states have (on average 1.5409039820166988) internal successors, (76774), 50082 states have internal predecessors, (76774), 3207 states have call successors, (3207), 1536 states have call predecessors, (3207), 1792 states have return successors, (10280), 3462 states have call predecessors, (10280), 3207 states have call successors, (10280) [2021-12-06 20:57:57,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54825 states to 54825 states and 90261 transitions. [2021-12-06 20:57:57,287 INFO L78 Accepts]: Start accepts. Automaton has 54825 states and 90261 transitions. Word has length 112 [2021-12-06 20:57:57,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:57:57,287 INFO L470 AbstractCegarLoop]: Abstraction has 54825 states and 90261 transitions. [2021-12-06 20:57:57,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:57:57,288 INFO L276 IsEmpty]: Start isEmpty. Operand 54825 states and 90261 transitions. [2021-12-06 20:57:57,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 20:57:57,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:57:57,313 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:57:57,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 20:57:57,313 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:57:57,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:57:57,313 INFO L85 PathProgramCache]: Analyzing trace with hash -238456545, now seen corresponding path program 1 times [2021-12-06 20:57:57,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:57:57,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686499861] [2021-12-06 20:57:57,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:57:57,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:57:57,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:57,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:57:57,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:57,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 20:57:57,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:57,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 20:57:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:57,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 20:57:57,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:57,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 20:57:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:57:57,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:57:57,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:57:57,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686499861] [2021-12-06 20:57:57,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686499861] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:57:57,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:57:57,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 20:57:57,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779152378] [2021-12-06 20:57:57,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:57:57,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 20:57:57,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:57:57,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 20:57:57,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:57:57,381 INFO L87 Difference]: Start difference. First operand 54825 states and 90261 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:58:05,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:58:05,752 INFO L93 Difference]: Finished difference Result 184593 states and 299929 transitions. [2021-12-06 20:58:05,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 20:58:05,753 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2021-12-06 20:58:05,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:06,141 INFO L225 Difference]: With dead ends: 184593 [2021-12-06 20:58:06,142 INFO L226 Difference]: Without dead ends: 131905 [2021-12-06 20:58:06,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-06 20:58:06,265 INFO L933 BasicCegarLoop]: 4646 mSDtfsCounter, 5048 mSDsluCounter, 12607 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5081 SdHoareTripleChecker+Valid, 17253 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:06,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5081 Valid, 17253 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1329 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 20:58:06,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131905 states. [2021-12-06 20:58:11,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131905 to 106229. [2021-12-06 20:58:11,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106229 states, 96235 states have (on average 1.524964929599418) internal successors, (146755), 97005 states have internal predecessors, (146755), 6408 states have call successors, (6408), 3072 states have call predecessors, (6408), 3584 states have return successors, (20297), 6407 states have call predecessors, (20297), 6408 states have call successors, (20297) [2021-12-06 20:58:12,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106229 states to 106229 states and 173460 transitions. [2021-12-06 20:58:12,028 INFO L78 Accepts]: Start accepts. Automaton has 106229 states and 173460 transitions. Word has length 112 [2021-12-06 20:58:12,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:58:12,028 INFO L470 AbstractCegarLoop]: Abstraction has 106229 states and 173460 transitions. [2021-12-06 20:58:12,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 20:58:12,028 INFO L276 IsEmpty]: Start isEmpty. Operand 106229 states and 173460 transitions. [2021-12-06 20:58:12,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-12-06 20:58:12,172 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:58:12,172 INFO L514 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, 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] [2021-12-06 20:58:12,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 20:58:12,172 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:58:12,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:58:12,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1077919352, now seen corresponding path program 1 times [2021-12-06 20:58:12,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:58:12,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036013710] [2021-12-06 20:58:12,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:12,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:58:12,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:12,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:58:12,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:12,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 20:58:12,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:12,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 20:58:12,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:12,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 20:58:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:12,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 20:58:12,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:12,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 20:58:12,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:12,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-06 20:58:12,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:12,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-06 20:58:12,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 20:58:12,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:58:12,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036013710] [2021-12-06 20:58:12,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036013710] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:58:12,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069772656] [2021-12-06 20:58:12,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:12,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:12,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:58:12,277 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:58:12,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 20:58:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:12,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 20:58:12,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:58:12,540 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 20:58:12,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:58:12,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069772656] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:58:12,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:58:12,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-06 20:58:12,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641857992] [2021-12-06 20:58:12,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:58:12,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:58:12,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:58:12,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:58:12,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:58:12,542 INFO L87 Difference]: Start difference. First operand 106229 states and 173460 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 20:58:22,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:58:22,153 INFO L93 Difference]: Finished difference Result 312619 states and 512666 transitions. [2021-12-06 20:58:22,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:58:22,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 182 [2021-12-06 20:58:22,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:22,861 INFO L225 Difference]: With dead ends: 312619 [2021-12-06 20:58:22,861 INFO L226 Difference]: Without dead ends: 208527 [2021-12-06 20:58:23,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:58:23,081 INFO L933 BasicCegarLoop]: 4313 mSDtfsCounter, 4227 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4227 SdHoareTripleChecker+Valid, 4624 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:23,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4227 Valid, 4624 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:58:23,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208527 states. [2021-12-06 20:58:33,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208527 to 207501. [2021-12-06 20:58:33,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207501 states, 187777 states have (on average 1.5200849944348882) internal successors, (285437), 189315 states have internal predecessors, (285437), 12554 states have call successors, (12554), 6144 states have call predecessors, (12554), 7168 states have return successors, (40075), 12297 states have call predecessors, (40075), 12554 states have call successors, (40075) [2021-12-06 20:58:34,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207501 states to 207501 states and 338066 transitions. [2021-12-06 20:58:34,708 INFO L78 Accepts]: Start accepts. Automaton has 207501 states and 338066 transitions. Word has length 182 [2021-12-06 20:58:34,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:58:34,708 INFO L470 AbstractCegarLoop]: Abstraction has 207501 states and 338066 transitions. [2021-12-06 20:58:34,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 20:58:34,709 INFO L276 IsEmpty]: Start isEmpty. Operand 207501 states and 338066 transitions. [2021-12-06 20:58:34,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-12-06 20:58:34,995 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:58:34,996 INFO L514 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, 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] [2021-12-06 20:58:35,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 20:58:35,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 20:58:35,198 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:58:35,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:58:35,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1018752152, now seen corresponding path program 1 times [2021-12-06 20:58:35,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:58:35,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129263784] [2021-12-06 20:58:35,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:35,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:58:35,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:35,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:58:35,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:35,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 20:58:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:35,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 20:58:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:35,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 20:58:35,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:35,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 20:58:35,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:35,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 20:58:35,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:35,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-06 20:58:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:35,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-06 20:58:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:35,343 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 20:58:35,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:58:35,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129263784] [2021-12-06 20:58:35,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129263784] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:58:35,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727397983] [2021-12-06 20:58:35,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:58:35,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:58:35,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:58:35,344 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:58:35,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 20:58:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:58:35,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 20:58:35,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:58:35,600 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-06 20:58:35,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:58:35,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727397983] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:58:35,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:58:35,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-06 20:58:35,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457015714] [2021-12-06 20:58:35,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:58:35,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:58:35,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:58:35,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:58:35,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:58:35,602 INFO L87 Difference]: Start difference. First operand 207501 states and 338066 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 20:58:54,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:58:54,933 INFO L93 Difference]: Finished difference Result 614643 states and 1006742 transitions. [2021-12-06 20:58:54,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:58:54,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 182 [2021-12-06 20:58:54,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:58:56,595 INFO L225 Difference]: With dead ends: 614643 [2021-12-06 20:58:56,595 INFO L226 Difference]: Without dead ends: 409279 [2021-12-06 20:58:57,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:58:57,147 INFO L933 BasicCegarLoop]: 4313 mSDtfsCounter, 4245 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4245 SdHoareTripleChecker+Valid, 4624 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:58:57,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4245 Valid, 4624 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:58:57,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409279 states. [2021-12-06 20:59:18,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409279 to 407229. [2021-12-06 20:59:18,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407229 states, 368301 states have (on average 1.516979318546515) internal successors, (558705), 371375 states have internal predecessors, (558705), 24590 states have call successors, (24590), 12288 states have call predecessors, (24590), 14336 states have return successors, (79375), 23821 states have call predecessors, (79375), 24590 states have call successors, (79375) [2021-12-06 20:59:20,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407229 states to 407229 states and 662670 transitions. [2021-12-06 20:59:20,311 INFO L78 Accepts]: Start accepts. Automaton has 407229 states and 662670 transitions. Word has length 182 [2021-12-06 20:59:20,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:59:20,312 INFO L470 AbstractCegarLoop]: Abstraction has 407229 states and 662670 transitions. [2021-12-06 20:59:20,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 20:59:20,312 INFO L276 IsEmpty]: Start isEmpty. Operand 407229 states and 662670 transitions. [2021-12-06 20:59:20,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-12-06 20:59:20,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:59:20,787 INFO L514 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, 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] [2021-12-06 20:59:20,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 20:59:20,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 20:59:20,989 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:59:20,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:59:20,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1076964680, now seen corresponding path program 1 times [2021-12-06 20:59:20,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:59:20,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489837790] [2021-12-06 20:59:20,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:59:20,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:59:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:21,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 20:59:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:21,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 20:59:21,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:21,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 20:59:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:21,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 20:59:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:21,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 20:59:21,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:21,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 20:59:21,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:21,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-06 20:59:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:21,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-06 20:59:21,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:21,093 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 20:59:21,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:59:21,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489837790] [2021-12-06 20:59:21,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489837790] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:59:21,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279021567] [2021-12-06 20:59:21,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:59:21,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:59:21,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:59:21,094 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:59:21,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 20:59:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:21,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 20:59:21,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:59:21,336 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 20:59:21,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:59:21,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279021567] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:59:21,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:59:21,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-06 20:59:21,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053008171] [2021-12-06 20:59:21,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:59:21,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:59:21,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:59:21,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:59:21,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 20:59:21,338 INFO L87 Difference]: Start difference. First operand 407229 states and 662670 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 21:00:00,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:00,830 INFO L93 Difference]: Finished difference Result 1210243 states and 1980814 transitions. [2021-12-06 21:00:00,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:00:00,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 182 [2021-12-06 21:00:00,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:04,184 INFO L225 Difference]: With dead ends: 1210243 [2021-12-06 21:00:04,184 INFO L226 Difference]: Without dead ends: 805151 [2021-12-06 21:00:05,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:00:05,337 INFO L933 BasicCegarLoop]: 4313 mSDtfsCounter, 4239 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4239 SdHoareTripleChecker+Valid, 4624 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:05,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4239 Valid, 4624 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:00:05,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805151 states. [2021-12-06 21:00:49,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805151 to 801053. [2021-12-06 21:00:49,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801053 states, 724229 states have (on average 1.5147819267110265) internal successors, (1097049), 730375 states have internal predecessors, (1097049), 48150 states have call successors, (48150), 24576 states have call predecessors, (48150), 28672 states have return successors, (157463), 46357 states have call predecessors, (157463), 48150 states have call successors, (157463) [2021-12-06 21:00:53,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801053 states to 801053 states and 1302662 transitions. [2021-12-06 21:00:53,653 INFO L78 Accepts]: Start accepts. Automaton has 801053 states and 1302662 transitions. Word has length 182 [2021-12-06 21:00:53,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:53,654 INFO L470 AbstractCegarLoop]: Abstraction has 801053 states and 1302662 transitions. [2021-12-06 21:00:53,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 21:00:53,654 INFO L276 IsEmpty]: Start isEmpty. Operand 801053 states and 1302662 transitions. [2021-12-06 21:00:54,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-12-06 21:00:54,721 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:54,721 INFO L514 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, 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] [2021-12-06 21:00:54,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 21:00:54,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 21:00:54,923 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:54,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:54,924 INFO L85 PathProgramCache]: Analyzing trace with hash 710136024, now seen corresponding path program 1 times [2021-12-06 21:00:54,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:54,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511921505] [2021-12-06 21:00:54,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:54,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:54,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:54,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:00:54,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:54,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 21:00:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:54,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 21:00:54,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:54,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 21:00:55,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:55,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 21:00:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:55,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 21:00:55,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:55,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-06 21:00:55,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:55,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-06 21:00:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:55,017 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 21:00:55,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:55,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511921505] [2021-12-06 21:00:55,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511921505] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:00:55,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027183374] [2021-12-06 21:00:55,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:55,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:00:55,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:00:55,018 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:00:55,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 21:00:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:55,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 21:00:55,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:00:55,252 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-06 21:00:55,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:00:55,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027183374] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:55,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:00:55,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-06 21:00:55,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758022670] [2021-12-06 21:00:55,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:55,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:00:55,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:55,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:00:55,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:00:55,254 INFO L87 Difference]: Start difference. First operand 801053 states and 1302662 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 21:02:14,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:02:14,059 INFO L93 Difference]: Finished difference Result 2370219 states and 3890576 transitions. [2021-12-06 21:02:14,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:02:14,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 182 [2021-12-06 21:02:14,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:02:21,133 INFO L225 Difference]: With dead ends: 2370219 [2021-12-06 21:02:21,134 INFO L226 Difference]: Without dead ends: 1571305 [2021-12-06 21:02:23,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:02:23,250 INFO L933 BasicCegarLoop]: 4619 mSDtfsCounter, 309 mSDsluCounter, 4301 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 8920 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:02:23,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 8920 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:02:24,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571305 states. [2021-12-06 21:03:52,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571305 to 1571305. [2021-12-06 21:03:53,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571305 states, 1421756 states have (on average 1.511632797751513) internal successors, (2149173), 1431999 states have internal predecessors, (2149173), 92203 states have call successors, (92203), 49152 states have call predecessors, (92203), 57344 states have return successors, (330303), 90665 states have call predecessors, (330303), 92203 states have call successors, (330303) [2021-12-06 21:04:01,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571305 states to 1571305 states and 2571679 transitions. [2021-12-06 21:04:01,531 INFO L78 Accepts]: Start accepts. Automaton has 1571305 states and 2571679 transitions. Word has length 182 [2021-12-06 21:04:01,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:04:01,532 INFO L470 AbstractCegarLoop]: Abstraction has 1571305 states and 2571679 transitions. [2021-12-06 21:04:01,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 21:04:01,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1571305 states and 2571679 transitions. [2021-12-06 21:04:06,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-12-06 21:04:06,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:04:06,473 INFO L514 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, 3, 3, 3, 3, 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] [2021-12-06 21:04:06,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 21:04:06,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:04:06,675 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:04:06,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:04:06,676 INFO L85 PathProgramCache]: Analyzing trace with hash 246727101, now seen corresponding path program 1 times [2021-12-06 21:04:06,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:04:06,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278979556] [2021-12-06 21:04:06,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:04:06,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:04:06,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:04:06,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 21:04:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:04:06,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 21:04:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:04:06,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 21:04:06,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:04:06,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 21:04:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:04:06,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 21:04:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:04:06,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 21:04:06,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:04:06,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-06 21:04:06,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:04:06,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-12-06 21:04:06,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:04:06,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-06 21:04:06,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:04:06,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2021-12-06 21:04:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:04:06,801 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-06 21:04:06,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:04:06,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278979556] [2021-12-06 21:04:06,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278979556] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:04:06,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699980924] [2021-12-06 21:04:06,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:04:06,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:04:06,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:04:06,802 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:04:06,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c2b4b7-d97d-4e36-9a1a-8e403b7ac965/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 21:04:06,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:04:06,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 21:04:06,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:04:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-06 21:04:07,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:04:07,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699980924] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:04:07,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:04:07,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-06 21:04:07,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120045649] [2021-12-06 21:04:07,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:04:07,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:04:07,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:04:07,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:04:07,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:04:07,065 INFO L87 Difference]: Start difference. First operand 1571305 states and 2571679 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10)