./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL --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 233676c1e8a1b5798ecf495818fb18bbff45b7aea47a9aff904b2f64a9e366a2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:28:58,032 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:28:58,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:28:58,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:28:58,077 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:28:58,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:28:58,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:28:58,084 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:28:58,087 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:28:58,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:28:58,091 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:28:58,093 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:28:58,094 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:28:58,096 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:28:58,099 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:28:58,101 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:28:58,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:28:58,105 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:28:58,108 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:28:58,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:28:58,114 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:28:58,117 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:28:58,119 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:28:58,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:28:58,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:28:58,126 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:28:58,127 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:28:58,129 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:28:58,130 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:28:58,131 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:28:58,132 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:28:58,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:28:58,135 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:28:58,137 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:28:58,139 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:28:58,139 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:28:58,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:28:58,141 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:28:58,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:28:58,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:28:58,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:28:58,147 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 04:28:58,180 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:28:58,181 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:28:58,181 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:28:58,182 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:28:58,187 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:28:58,188 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:28:58,189 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:28:58,189 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:28:58,190 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:28:58,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:28:58,191 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:28:58,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:28:58,191 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:28:58,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:28:58,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:28:58,193 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:28:58,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:28:58,194 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:28:58,194 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:28:58,195 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:28:58,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:28:58,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:28:58,196 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:28:58,196 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:28:58,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:28:58,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:28:58,197 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:28:58,197 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:28:58,198 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:28:58,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:28:58,200 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:28:58,200 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:28:58,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:28:58,201 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:28:58,201 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_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 233676c1e8a1b5798ecf495818fb18bbff45b7aea47a9aff904b2f64a9e366a2 [2021-11-19 04:28:58,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:28:58,646 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:28:58,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:28:58,651 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:28:58,652 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:28:58,654 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-19 04:28:58,786 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/data/cf6019f96/5d29e2ef81ef414dbb9dad7cb3cbc97c/FLAG3852f8655 [2021-11-19 04:28:59,473 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:28:59,474 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-19 04:28:59,488 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/data/cf6019f96/5d29e2ef81ef414dbb9dad7cb3cbc97c/FLAG3852f8655 [2021-11-19 04:28:59,790 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/data/cf6019f96/5d29e2ef81ef414dbb9dad7cb3cbc97c [2021-11-19 04:28:59,794 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:28:59,796 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:28:59,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:28:59,798 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:28:59,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:28:59,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:28:59" (1/1) ... [2021-11-19 04:28:59,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@953f008 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:28:59, skipping insertion in model container [2021-11-19 04:28:59,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:28:59" (1/1) ... [2021-11-19 04:28:59,815 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:28:59,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:29:00,207 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_2eba6be9-a40a-4667-8116-5b61c907af72/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6876,6889] [2021-11-19 04:29:00,227 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_2eba6be9-a40a-4667-8116-5b61c907af72/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9071,9084] [2021-11-19 04:29:00,242 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:29:00,258 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:29:00,320 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_2eba6be9-a40a-4667-8116-5b61c907af72/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6876,6889] [2021-11-19 04:29:00,336 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_2eba6be9-a40a-4667-8116-5b61c907af72/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9071,9084] [2021-11-19 04:29:00,348 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:29:00,371 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:29:00,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:00 WrapperNode [2021-11-19 04:29:00,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:29:00,374 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:29:00,375 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:29:00,375 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:29:00,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:00" (1/1) ... [2021-11-19 04:29:00,401 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:00" (1/1) ... [2021-11-19 04:29:00,453 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 447 [2021-11-19 04:29:00,453 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:29:00,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:29:00,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:29:00,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:29:00,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:00" (1/1) ... [2021-11-19 04:29:00,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:00" (1/1) ... [2021-11-19 04:29:00,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:00" (1/1) ... [2021-11-19 04:29:00,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:00" (1/1) ... [2021-11-19 04:29:00,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:00" (1/1) ... [2021-11-19 04:29:00,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:00" (1/1) ... [2021-11-19 04:29:00,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:00" (1/1) ... [2021-11-19 04:29:00,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:29:00,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:29:00,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:29:00,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:29:00,511 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:00" (1/1) ... [2021-11-19 04:29:00,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:29:00,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:29:00,564 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:29:00,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:29:00,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:29:00,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:29:00,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:29:00,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:29:00,748 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:29:00,750 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:29:01,348 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:29:01,375 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:29:01,377 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 04:29:01,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:29:01 BoogieIcfgContainer [2021-11-19 04:29:01,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:29:01,384 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:29:01,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:29:01,391 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:29:01,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:28:59" (1/3) ... [2021-11-19 04:29:01,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@422411e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:29:01, skipping insertion in model container [2021-11-19 04:29:01,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:00" (2/3) ... [2021-11-19 04:29:01,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@422411e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:29:01, skipping insertion in model container [2021-11-19 04:29:01,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:29:01" (3/3) ... [2021-11-19 04:29:01,401 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-19 04:29:01,407 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:29:01,407 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-19 04:29:01,469 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:29:01,479 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 04:29:01,479 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-19 04:29:01,503 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 103 states have (on average 1.7475728155339805) internal successors, (180), 105 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:01,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-19 04:29:01,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:01,515 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] [2021-11-19 04:29:01,516 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:01,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:01,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1096512752, now seen corresponding path program 1 times [2021-11-19 04:29:01,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:01,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218416758] [2021-11-19 04:29:01,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:01,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:02,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:02,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:02,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218416758] [2021-11-19 04:29:02,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218416758] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:02,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:02,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:29:02,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26569748] [2021-11-19 04:29:02,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:02,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:29:02,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:02,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:29:02,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:29:02,200 INFO L87 Difference]: Start difference. First operand has 106 states, 103 states have (on average 1.7475728155339805) internal successors, (180), 105 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:02,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:02,697 INFO L93 Difference]: Finished difference Result 422 states and 668 transitions. [2021-11-19 04:29:02,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:29:02,705 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-19 04:29:02,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:02,742 INFO L225 Difference]: With dead ends: 422 [2021-11-19 04:29:02,742 INFO L226 Difference]: Without dead ends: 358 [2021-11-19 04:29:02,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:29:02,752 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 596 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:02,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [596 Valid, 775 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:29:02,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-11-19 04:29:02,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 156. [2021-11-19 04:29:02,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 154 states have (on average 1.4415584415584415) internal successors, (222), 155 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:02,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 222 transitions. [2021-11-19 04:29:02,828 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 222 transitions. Word has length 47 [2021-11-19 04:29:02,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:02,829 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 222 transitions. [2021-11-19 04:29:02,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:02,830 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 222 transitions. [2021-11-19 04:29:02,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-19 04:29:02,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:02,833 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] [2021-11-19 04:29:02,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:29:02,833 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:02,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:02,835 INFO L85 PathProgramCache]: Analyzing trace with hash 191283016, now seen corresponding path program 1 times [2021-11-19 04:29:02,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:02,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848868732] [2021-11-19 04:29:02,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:02,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:02,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:02,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:02,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848868732] [2021-11-19 04:29:02,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848868732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:02,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:02,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:29:02,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707052633] [2021-11-19 04:29:02,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:02,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:29:02,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:02,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:29:03,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:29:03,006 INFO L87 Difference]: Start difference. First operand 156 states and 222 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:03,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:03,118 INFO L93 Difference]: Finished difference Result 247 states and 359 transitions. [2021-11-19 04:29:03,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:29:03,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-19 04:29:03,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:03,127 INFO L225 Difference]: With dead ends: 247 [2021-11-19 04:29:03,128 INFO L226 Difference]: Without dead ends: 160 [2021-11-19 04:29:03,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:29:03,133 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 75 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:03,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 305 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:29:03,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-19 04:29:03,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2021-11-19 04:29:03,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 156 states have (on average 1.4294871794871795) internal successors, (223), 157 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:03,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 223 transitions. [2021-11-19 04:29:03,179 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 223 transitions. Word has length 48 [2021-11-19 04:29:03,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:03,181 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 223 transitions. [2021-11-19 04:29:03,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:03,183 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 223 transitions. [2021-11-19 04:29:03,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-19 04:29:03,190 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:03,192 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] [2021-11-19 04:29:03,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 04:29:03,193 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:03,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:03,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1589815569, now seen corresponding path program 1 times [2021-11-19 04:29:03,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:03,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760100230] [2021-11-19 04:29:03,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:03,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:03,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:03,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:03,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:03,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760100230] [2021-11-19 04:29:03,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760100230] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:03,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:03,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:29:03,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649032125] [2021-11-19 04:29:03,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:03,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:29:03,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:03,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:29:03,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:29:03,402 INFO L87 Difference]: Start difference. First operand 158 states and 223 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:03,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:03,656 INFO L93 Difference]: Finished difference Result 478 states and 707 transitions. [2021-11-19 04:29:03,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:29:03,657 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-19 04:29:03,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:03,661 INFO L225 Difference]: With dead ends: 478 [2021-11-19 04:29:03,661 INFO L226 Difference]: Without dead ends: 394 [2021-11-19 04:29:03,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:29:03,665 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 304 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:03,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 542 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:29:03,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-11-19 04:29:03,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 251. [2021-11-19 04:29:03,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 249 states have (on average 1.4698795180722892) internal successors, (366), 250 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:03,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 366 transitions. [2021-11-19 04:29:03,701 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 366 transitions. Word has length 49 [2021-11-19 04:29:03,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:03,701 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 366 transitions. [2021-11-19 04:29:03,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:03,702 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 366 transitions. [2021-11-19 04:29:03,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-19 04:29:03,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:03,705 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] [2021-11-19 04:29:03,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 04:29:03,706 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:03,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:03,707 INFO L85 PathProgramCache]: Analyzing trace with hash 727047131, now seen corresponding path program 1 times [2021-11-19 04:29:03,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:03,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623735720] [2021-11-19 04:29:03,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:03,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:03,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:03,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:03,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623735720] [2021-11-19 04:29:03,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623735720] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:03,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:03,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:29:03,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514700939] [2021-11-19 04:29:03,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:03,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:29:03,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:03,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:29:03,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:29:03,844 INFO L87 Difference]: Start difference. First operand 251 states and 366 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:04,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:04,036 INFO L93 Difference]: Finished difference Result 566 states and 842 transitions. [2021-11-19 04:29:04,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:29:04,038 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-19 04:29:04,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:04,045 INFO L225 Difference]: With dead ends: 566 [2021-11-19 04:29:04,046 INFO L226 Difference]: Without dead ends: 482 [2021-11-19 04:29:04,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:29:04,061 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 358 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:04,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 564 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:29:04,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-11-19 04:29:04,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 382. [2021-11-19 04:29:04,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 380 states have (on average 1.4894736842105263) internal successors, (566), 381 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:04,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 566 transitions. [2021-11-19 04:29:04,126 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 566 transitions. Word has length 49 [2021-11-19 04:29:04,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:04,127 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 566 transitions. [2021-11-19 04:29:04,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:04,132 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 566 transitions. [2021-11-19 04:29:04,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-19 04:29:04,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:04,134 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] [2021-11-19 04:29:04,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 04:29:04,137 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:04,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:04,140 INFO L85 PathProgramCache]: Analyzing trace with hash 118541383, now seen corresponding path program 1 times [2021-11-19 04:29:04,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:04,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394701468] [2021-11-19 04:29:04,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:04,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:04,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:04,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394701468] [2021-11-19 04:29:04,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394701468] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:04,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:04,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:29:04,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393432814] [2021-11-19 04:29:04,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:04,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:29:04,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:04,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:29:04,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:29:04,321 INFO L87 Difference]: Start difference. First operand 382 states and 566 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:04,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:04,506 INFO L93 Difference]: Finished difference Result 659 states and 985 transitions. [2021-11-19 04:29:04,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:29:04,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-19 04:29:04,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:04,516 INFO L225 Difference]: With dead ends: 659 [2021-11-19 04:29:04,517 INFO L226 Difference]: Without dead ends: 575 [2021-11-19 04:29:04,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:29:04,525 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 367 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:04,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 560 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:29:04,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-11-19 04:29:04,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 475. [2021-11-19 04:29:04,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 473 states have (on average 1.4989429175475688) internal successors, (709), 474 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:04,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 709 transitions. [2021-11-19 04:29:04,583 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 709 transitions. Word has length 49 [2021-11-19 04:29:04,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:04,589 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 709 transitions. [2021-11-19 04:29:04,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:04,590 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 709 transitions. [2021-11-19 04:29:04,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-19 04:29:04,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:04,594 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] [2021-11-19 04:29:04,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 04:29:04,596 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:04,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:04,605 INFO L85 PathProgramCache]: Analyzing trace with hash 2078764873, now seen corresponding path program 1 times [2021-11-19 04:29:04,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:04,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808283811] [2021-11-19 04:29:04,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:04,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:04,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:04,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:04,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808283811] [2021-11-19 04:29:04,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808283811] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:04,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:04,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:29:04,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120005829] [2021-11-19 04:29:04,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:04,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:29:04,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:04,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:29:04,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:29:04,724 INFO L87 Difference]: Start difference. First operand 475 states and 709 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:04,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:04,995 INFO L93 Difference]: Finished difference Result 1341 states and 2026 transitions. [2021-11-19 04:29:04,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:29:04,996 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-19 04:29:04,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:05,003 INFO L225 Difference]: With dead ends: 1341 [2021-11-19 04:29:05,004 INFO L226 Difference]: Without dead ends: 888 [2021-11-19 04:29:05,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:29:05,008 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 560 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:05,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 137 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:29:05,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-11-19 04:29:05,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 883. [2021-11-19 04:29:05,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 881 states have (on average 1.5062429057888762) internal successors, (1327), 882 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:05,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1327 transitions. [2021-11-19 04:29:05,108 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1327 transitions. Word has length 50 [2021-11-19 04:29:05,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:05,108 INFO L470 AbstractCegarLoop]: Abstraction has 883 states and 1327 transitions. [2021-11-19 04:29:05,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:05,109 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1327 transitions. [2021-11-19 04:29:05,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-19 04:29:05,113 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:05,114 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] [2021-11-19 04:29:05,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 04:29:05,114 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:05,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:05,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1832903282, now seen corresponding path program 1 times [2021-11-19 04:29:05,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:05,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560067382] [2021-11-19 04:29:05,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:05,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:05,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:05,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:05,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:05,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560067382] [2021-11-19 04:29:05,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560067382] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:05,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:05,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:29:05,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125870724] [2021-11-19 04:29:05,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:05,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:29:05,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:05,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:29:05,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:29:05,244 INFO L87 Difference]: Start difference. First operand 883 states and 1327 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:05,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:05,508 INFO L93 Difference]: Finished difference Result 1740 states and 2627 transitions. [2021-11-19 04:29:05,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:29:05,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-19 04:29:05,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:05,520 INFO L225 Difference]: With dead ends: 1740 [2021-11-19 04:29:05,520 INFO L226 Difference]: Without dead ends: 883 [2021-11-19 04:29:05,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:29:05,524 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 365 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:05,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 90 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:29:05,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-11-19 04:29:05,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 883. [2021-11-19 04:29:05,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 881 states have (on average 1.4846765039727583) internal successors, (1308), 882 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:05,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1308 transitions. [2021-11-19 04:29:05,626 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1308 transitions. Word has length 51 [2021-11-19 04:29:05,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:05,628 INFO L470 AbstractCegarLoop]: Abstraction has 883 states and 1308 transitions. [2021-11-19 04:29:05,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:05,629 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1308 transitions. [2021-11-19 04:29:05,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-19 04:29:05,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:05,630 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] [2021-11-19 04:29:05,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 04:29:05,631 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:05,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:05,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1624812893, now seen corresponding path program 1 times [2021-11-19 04:29:05,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:05,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914633752] [2021-11-19 04:29:05,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:05,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:05,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:05,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:05,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:05,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914633752] [2021-11-19 04:29:05,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914633752] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:05,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:05,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:29:05,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071765277] [2021-11-19 04:29:05,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:05,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:29:05,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:05,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:29:05,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:29:05,740 INFO L87 Difference]: Start difference. First operand 883 states and 1308 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:05,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:05,955 INFO L93 Difference]: Finished difference Result 1736 states and 2585 transitions. [2021-11-19 04:29:05,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:29:05,956 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-19 04:29:05,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:05,964 INFO L225 Difference]: With dead ends: 1736 [2021-11-19 04:29:05,965 INFO L226 Difference]: Without dead ends: 883 [2021-11-19 04:29:05,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:29:05,968 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 347 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:05,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 98 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:29:05,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-11-19 04:29:06,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 883. [2021-11-19 04:29:06,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 881 states have (on average 1.4631101021566402) internal successors, (1289), 882 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:06,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1289 transitions. [2021-11-19 04:29:06,069 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1289 transitions. Word has length 52 [2021-11-19 04:29:06,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:06,070 INFO L470 AbstractCegarLoop]: Abstraction has 883 states and 1289 transitions. [2021-11-19 04:29:06,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:06,070 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1289 transitions. [2021-11-19 04:29:06,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-19 04:29:06,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:06,073 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] [2021-11-19 04:29:06,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 04:29:06,073 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:06,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:06,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1423750650, now seen corresponding path program 1 times [2021-11-19 04:29:06,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:06,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918702639] [2021-11-19 04:29:06,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:06,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:06,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:06,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:06,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:06,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918702639] [2021-11-19 04:29:06,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918702639] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:06,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:06,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-19 04:29:06,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375487805] [2021-11-19 04:29:06,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:06,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 04:29:06,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:06,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 04:29:06,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:29:06,574 INFO L87 Difference]: Start difference. First operand 883 states and 1289 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:07,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:07,598 INFO L93 Difference]: Finished difference Result 2492 states and 3651 transitions. [2021-11-19 04:29:07,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 04:29:07,599 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-19 04:29:07,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:07,614 INFO L225 Difference]: With dead ends: 2492 [2021-11-19 04:29:07,614 INFO L226 Difference]: Without dead ends: 1713 [2021-11-19 04:29:07,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-11-19 04:29:07,618 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 727 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:07,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [727 Valid, 430 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:29:07,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2021-11-19 04:29:07,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 883. [2021-11-19 04:29:07,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 881 states have (on average 1.456299659477866) internal successors, (1283), 882 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:07,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1283 transitions. [2021-11-19 04:29:07,776 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1283 transitions. Word has length 53 [2021-11-19 04:29:07,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:07,777 INFO L470 AbstractCegarLoop]: Abstraction has 883 states and 1283 transitions. [2021-11-19 04:29:07,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:07,778 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1283 transitions. [2021-11-19 04:29:07,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-19 04:29:07,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:07,779 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] [2021-11-19 04:29:07,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 04:29:07,780 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:07,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:07,780 INFO L85 PathProgramCache]: Analyzing trace with hash 232050318, now seen corresponding path program 1 times [2021-11-19 04:29:07,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:07,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317882898] [2021-11-19 04:29:07,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:07,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:07,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:07,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317882898] [2021-11-19 04:29:07,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317882898] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:07,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:07,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:29:07,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610805366] [2021-11-19 04:29:07,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:07,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:29:07,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:07,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:29:07,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:29:07,998 INFO L87 Difference]: Start difference. First operand 883 states and 1283 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:08,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:08,697 INFO L93 Difference]: Finished difference Result 2444 states and 3594 transitions. [2021-11-19 04:29:08,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:29:08,698 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-19 04:29:08,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:08,712 INFO L225 Difference]: With dead ends: 2444 [2021-11-19 04:29:08,712 INFO L226 Difference]: Without dead ends: 1662 [2021-11-19 04:29:08,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-11-19 04:29:08,716 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 699 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:08,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [699 Valid, 297 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:29:08,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2021-11-19 04:29:08,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 883. [2021-11-19 04:29:08,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 881 states have (on average 1.4551645856980704) internal successors, (1282), 882 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:08,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1282 transitions. [2021-11-19 04:29:08,895 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1282 transitions. Word has length 53 [2021-11-19 04:29:08,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:08,895 INFO L470 AbstractCegarLoop]: Abstraction has 883 states and 1282 transitions. [2021-11-19 04:29:08,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:08,896 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1282 transitions. [2021-11-19 04:29:08,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-19 04:29:08,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:08,898 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] [2021-11-19 04:29:08,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 04:29:08,898 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:08,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:08,899 INFO L85 PathProgramCache]: Analyzing trace with hash 563944451, now seen corresponding path program 1 times [2021-11-19 04:29:08,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:08,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458496252] [2021-11-19 04:29:08,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:08,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:09,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:09,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:09,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458496252] [2021-11-19 04:29:09,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458496252] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:09,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:09,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-19 04:29:09,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932684506] [2021-11-19 04:29:09,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:09,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 04:29:09,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:09,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 04:29:09,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:29:09,275 INFO L87 Difference]: Start difference. First operand 883 states and 1282 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:10,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:10,782 INFO L93 Difference]: Finished difference Result 2257 states and 3269 transitions. [2021-11-19 04:29:10,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 04:29:10,783 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-19 04:29:10,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:10,794 INFO L225 Difference]: With dead ends: 2257 [2021-11-19 04:29:10,795 INFO L226 Difference]: Without dead ends: 1463 [2021-11-19 04:29:10,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2021-11-19 04:29:10,799 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 784 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:10,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [784 Valid, 596 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:29:10,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-11-19 04:29:10,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 883. [2021-11-19 04:29:10,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 881 states have (on average 1.4517593643586832) internal successors, (1279), 882 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:10,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1279 transitions. [2021-11-19 04:29:10,967 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1279 transitions. Word has length 54 [2021-11-19 04:29:10,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:10,967 INFO L470 AbstractCegarLoop]: Abstraction has 883 states and 1279 transitions. [2021-11-19 04:29:10,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:10,968 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1279 transitions. [2021-11-19 04:29:10,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-19 04:29:10,969 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:10,969 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] [2021-11-19 04:29:10,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 04:29:10,970 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:10,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:10,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1521991144, now seen corresponding path program 1 times [2021-11-19 04:29:10,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:10,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134112300] [2021-11-19 04:29:10,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:10,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:11,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:11,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:11,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:11,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134112300] [2021-11-19 04:29:11,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134112300] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:11,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:11,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 04:29:11,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660006017] [2021-11-19 04:29:11,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:11,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 04:29:11,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:11,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 04:29:11,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-11-19 04:29:11,779 INFO L87 Difference]: Start difference. First operand 883 states and 1279 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:15,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:15,511 INFO L93 Difference]: Finished difference Result 3210 states and 4721 transitions. [2021-11-19 04:29:15,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 04:29:15,512 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-19 04:29:15,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:15,534 INFO L225 Difference]: With dead ends: 3210 [2021-11-19 04:29:15,535 INFO L226 Difference]: Without dead ends: 2865 [2021-11-19 04:29:15,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=338, Invalid=1554, Unknown=0, NotChecked=0, Total=1892 [2021-11-19 04:29:15,539 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 1177 mSDsluCounter, 3615 mSDsCounter, 0 mSdLazyCounter, 2047 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1177 SdHoareTripleChecker+Valid, 3896 SdHoareTripleChecker+Invalid, 2107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:15,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1177 Valid, 3896 Invalid, 2107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2047 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 04:29:15,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2021-11-19 04:29:15,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 883. [2021-11-19 04:29:15,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 881 states have (on average 1.449489216799092) internal successors, (1277), 882 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:15,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1277 transitions. [2021-11-19 04:29:15,798 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1277 transitions. Word has length 55 [2021-11-19 04:29:15,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:15,798 INFO L470 AbstractCegarLoop]: Abstraction has 883 states and 1277 transitions. [2021-11-19 04:29:15,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:15,799 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1277 transitions. [2021-11-19 04:29:15,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-19 04:29:15,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:15,801 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] [2021-11-19 04:29:15,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-19 04:29:15,801 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:15,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:15,802 INFO L85 PathProgramCache]: Analyzing trace with hash 822613335, now seen corresponding path program 1 times [2021-11-19 04:29:15,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:15,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178481189] [2021-11-19 04:29:15,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:15,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:15,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:16,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:16,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:16,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178481189] [2021-11-19 04:29:16,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178481189] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:16,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:16,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 04:29:16,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472397526] [2021-11-19 04:29:16,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:16,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 04:29:16,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:16,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 04:29:16,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-11-19 04:29:16,598 INFO L87 Difference]: Start difference. First operand 883 states and 1277 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:20,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:20,324 INFO L93 Difference]: Finished difference Result 4360 states and 6437 transitions. [2021-11-19 04:29:20,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-19 04:29:20,326 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-19 04:29:20,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:20,357 INFO L225 Difference]: With dead ends: 4360 [2021-11-19 04:29:20,358 INFO L226 Difference]: Without dead ends: 4021 [2021-11-19 04:29:20,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=316, Invalid=1490, Unknown=0, NotChecked=0, Total=1806 [2021-11-19 04:29:20,362 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 1759 mSDsluCounter, 3746 mSDsCounter, 0 mSdLazyCounter, 1988 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1759 SdHoareTripleChecker+Valid, 4085 SdHoareTripleChecker+Invalid, 2074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:20,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1759 Valid, 4085 Invalid, 2074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1988 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-19 04:29:20,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4021 states. [2021-11-19 04:29:20,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4021 to 888. [2021-11-19 04:29:20,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 886 states have (on average 1.4480812641083523) internal successors, (1283), 887 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:20,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1283 transitions. [2021-11-19 04:29:20,594 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1283 transitions. Word has length 55 [2021-11-19 04:29:20,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:20,595 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 1283 transitions. [2021-11-19 04:29:20,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:20,595 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1283 transitions. [2021-11-19 04:29:20,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-19 04:29:20,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:20,599 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] [2021-11-19 04:29:20,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-19 04:29:20,599 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:20,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:20,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1171871732, now seen corresponding path program 1 times [2021-11-19 04:29:20,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:20,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910395617] [2021-11-19 04:29:20,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:20,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:21,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:21,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:21,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910395617] [2021-11-19 04:29:21,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910395617] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:21,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:21,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-19 04:29:21,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28758945] [2021-11-19 04:29:21,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:21,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 04:29:21,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:21,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 04:29:21,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:29:21,150 INFO L87 Difference]: Start difference. First operand 888 states and 1283 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:23,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:23,216 INFO L93 Difference]: Finished difference Result 2348 states and 3442 transitions. [2021-11-19 04:29:23,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 04:29:23,217 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-19 04:29:23,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:23,229 INFO L225 Difference]: With dead ends: 2348 [2021-11-19 04:29:23,230 INFO L226 Difference]: Without dead ends: 1976 [2021-11-19 04:29:23,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-11-19 04:29:23,233 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 828 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 1431 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:23,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [828 Valid, 1431 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:29:23,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2021-11-19 04:29:23,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 855. [2021-11-19 04:29:23,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 853 states have (on average 1.4525205158264947) internal successors, (1239), 854 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:23,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1239 transitions. [2021-11-19 04:29:23,489 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1239 transitions. Word has length 55 [2021-11-19 04:29:23,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:23,490 INFO L470 AbstractCegarLoop]: Abstraction has 855 states and 1239 transitions. [2021-11-19 04:29:23,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:23,490 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1239 transitions. [2021-11-19 04:29:23,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-19 04:29:23,491 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:23,491 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] [2021-11-19 04:29:23,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-19 04:29:23,492 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:23,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:23,492 INFO L85 PathProgramCache]: Analyzing trace with hash 380290649, now seen corresponding path program 1 times [2021-11-19 04:29:23,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:23,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473937293] [2021-11-19 04:29:23,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:23,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:23,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:24,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:24,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:24,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473937293] [2021-11-19 04:29:24,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473937293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:24,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:24,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 04:29:24,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383363802] [2021-11-19 04:29:24,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:24,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 04:29:24,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:24,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 04:29:24,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-11-19 04:29:24,139 INFO L87 Difference]: Start difference. First operand 855 states and 1239 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:27,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:27,401 INFO L93 Difference]: Finished difference Result 2986 states and 4393 transitions. [2021-11-19 04:29:27,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 04:29:27,402 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-19 04:29:27,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:27,420 INFO L225 Difference]: With dead ends: 2986 [2021-11-19 04:29:27,420 INFO L226 Difference]: Without dead ends: 2641 [2021-11-19 04:29:27,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=294, Invalid=1188, Unknown=0, NotChecked=0, Total=1482 [2021-11-19 04:29:27,424 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 1026 mSDsluCounter, 3280 mSDsCounter, 0 mSdLazyCounter, 1642 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 3515 SdHoareTripleChecker+Invalid, 1692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:27,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1026 Valid, 3515 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1642 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 04:29:27,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2641 states. [2021-11-19 04:29:27,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2641 to 860. [2021-11-19 04:29:27,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 858 states have (on average 1.4498834498834499) internal successors, (1244), 859 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:27,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1244 transitions. [2021-11-19 04:29:27,703 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1244 transitions. Word has length 55 [2021-11-19 04:29:27,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:27,704 INFO L470 AbstractCegarLoop]: Abstraction has 860 states and 1244 transitions. [2021-11-19 04:29:27,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:27,704 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1244 transitions. [2021-11-19 04:29:27,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-19 04:29:27,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:27,706 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] [2021-11-19 04:29:27,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-19 04:29:27,706 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:27,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:27,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1258334466, now seen corresponding path program 1 times [2021-11-19 04:29:27,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:27,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388439439] [2021-11-19 04:29:27,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:27,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:28,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:28,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:28,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388439439] [2021-11-19 04:29:28,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388439439] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:28,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:28,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-19 04:29:28,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365117377] [2021-11-19 04:29:28,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:28,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 04:29:28,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:29,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 04:29:29,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-11-19 04:29:29,002 INFO L87 Difference]: Start difference. First operand 860 states and 1244 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:34,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:34,646 INFO L93 Difference]: Finished difference Result 4873 states and 7215 transitions. [2021-11-19 04:29:34,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 04:29:34,647 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-19 04:29:34,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:34,677 INFO L225 Difference]: With dead ends: 4873 [2021-11-19 04:29:34,678 INFO L226 Difference]: Without dead ends: 4534 [2021-11-19 04:29:34,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=375, Invalid=1881, Unknown=0, NotChecked=0, Total=2256 [2021-11-19 04:29:34,682 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 1706 mSDsluCounter, 4007 mSDsCounter, 0 mSdLazyCounter, 2255 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1706 SdHoareTripleChecker+Valid, 4322 SdHoareTripleChecker+Invalid, 2324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:34,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1706 Valid, 4322 Invalid, 2324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2255 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 04:29:34,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4534 states. [2021-11-19 04:29:35,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4534 to 849. [2021-11-19 04:29:35,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 847 states have (on average 1.4521841794569068) internal successors, (1230), 848 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:35,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1230 transitions. [2021-11-19 04:29:35,050 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1230 transitions. Word has length 56 [2021-11-19 04:29:35,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:35,051 INFO L470 AbstractCegarLoop]: Abstraction has 849 states and 1230 transitions. [2021-11-19 04:29:35,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:35,052 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1230 transitions. [2021-11-19 04:29:35,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-19 04:29:35,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:35,053 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] [2021-11-19 04:29:35,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-19 04:29:35,054 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:35,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:35,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1802177434, now seen corresponding path program 1 times [2021-11-19 04:29:35,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:35,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525216276] [2021-11-19 04:29:35,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:35,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:35,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:35,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:35,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:35,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525216276] [2021-11-19 04:29:35,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525216276] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:35,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:35,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-19 04:29:35,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84194458] [2021-11-19 04:29:35,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:35,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 04:29:35,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:35,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 04:29:35,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:29:35,518 INFO L87 Difference]: Start difference. First operand 849 states and 1230 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:37,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:37,722 INFO L93 Difference]: Finished difference Result 3414 states and 5063 transitions. [2021-11-19 04:29:37,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 04:29:37,723 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-19 04:29:37,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:37,738 INFO L225 Difference]: With dead ends: 3414 [2021-11-19 04:29:37,739 INFO L226 Difference]: Without dead ends: 3054 [2021-11-19 04:29:37,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-11-19 04:29:37,742 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 738 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:37,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [738 Valid, 1126 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:29:37,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3054 states. [2021-11-19 04:29:38,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3054 to 822. [2021-11-19 04:29:38,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 820 states have (on average 1.4585365853658536) internal successors, (1196), 821 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:38,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1196 transitions. [2021-11-19 04:29:38,074 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1196 transitions. Word has length 56 [2021-11-19 04:29:38,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:38,075 INFO L470 AbstractCegarLoop]: Abstraction has 822 states and 1196 transitions. [2021-11-19 04:29:38,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:38,076 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1196 transitions. [2021-11-19 04:29:38,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-19 04:29:38,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:38,077 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] [2021-11-19 04:29:38,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-19 04:29:38,077 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:38,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:38,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1179705887, now seen corresponding path program 1 times [2021-11-19 04:29:38,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:38,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902302329] [2021-11-19 04:29:38,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:38,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:38,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:38,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:38,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:38,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902302329] [2021-11-19 04:29:38,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902302329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:38,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:38,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-19 04:29:38,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168566748] [2021-11-19 04:29:38,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:38,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 04:29:38,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:38,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 04:29:38,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:29:38,637 INFO L87 Difference]: Start difference. First operand 822 states and 1196 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:41,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:41,295 INFO L93 Difference]: Finished difference Result 3881 states and 5749 transitions. [2021-11-19 04:29:41,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 04:29:41,296 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-19 04:29:41,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:41,304 INFO L225 Difference]: With dead ends: 3881 [2021-11-19 04:29:41,304 INFO L226 Difference]: Without dead ends: 3542 [2021-11-19 04:29:41,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2021-11-19 04:29:41,307 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 1078 mSDsluCounter, 1717 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1078 SdHoareTripleChecker+Valid, 1942 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:41,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1078 Valid, 1942 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:29:41,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3542 states. [2021-11-19 04:29:41,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3542 to 827. [2021-11-19 04:29:41,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 825 states have (on average 1.456969696969697) internal successors, (1202), 826 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:41,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1202 transitions. [2021-11-19 04:29:41,602 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1202 transitions. Word has length 56 [2021-11-19 04:29:41,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:41,602 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1202 transitions. [2021-11-19 04:29:41,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:41,603 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1202 transitions. [2021-11-19 04:29:41,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 04:29:41,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:41,604 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] [2021-11-19 04:29:41,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-19 04:29:41,604 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:41,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:41,605 INFO L85 PathProgramCache]: Analyzing trace with hash -684019272, now seen corresponding path program 1 times [2021-11-19 04:29:41,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:41,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710274879] [2021-11-19 04:29:41,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:41,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:41,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:42,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:42,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:42,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710274879] [2021-11-19 04:29:42,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710274879] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:42,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:42,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-19 04:29:42,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841325125] [2021-11-19 04:29:42,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:42,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 04:29:42,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:42,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 04:29:42,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-11-19 04:29:42,167 INFO L87 Difference]: Start difference. First operand 827 states and 1202 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:45,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:45,121 INFO L93 Difference]: Finished difference Result 3394 states and 5039 transitions. [2021-11-19 04:29:45,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-19 04:29:45,121 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-19 04:29:45,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:45,127 INFO L225 Difference]: With dead ends: 3394 [2021-11-19 04:29:45,127 INFO L226 Difference]: Without dead ends: 3055 [2021-11-19 04:29:45,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=265, Invalid=1375, Unknown=0, NotChecked=0, Total=1640 [2021-11-19 04:29:45,130 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 451 mSDsluCounter, 2720 mSDsCounter, 0 mSdLazyCounter, 1592 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 2928 SdHoareTripleChecker+Invalid, 1623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:45,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 2928 Invalid, 1623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1592 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 04:29:45,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2021-11-19 04:29:45,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 813. [2021-11-19 04:29:45,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 1.4605911330049262) internal successors, (1186), 812 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:45,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1186 transitions. [2021-11-19 04:29:45,418 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1186 transitions. Word has length 57 [2021-11-19 04:29:45,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:45,418 INFO L470 AbstractCegarLoop]: Abstraction has 813 states and 1186 transitions. [2021-11-19 04:29:45,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:45,418 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1186 transitions. [2021-11-19 04:29:45,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-19 04:29:45,419 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:45,420 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:29:45,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-19 04:29:45,420 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:45,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:45,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1531780676, now seen corresponding path program 1 times [2021-11-19 04:29:45,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:45,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672934684] [2021-11-19 04:29:45,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:45,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:45,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:45,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:45,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:45,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672934684] [2021-11-19 04:29:45,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672934684] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:45,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:45,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:29:45,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379812828] [2021-11-19 04:29:45,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:45,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:29:45,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:45,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:29:45,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:29:45,465 INFO L87 Difference]: Start difference. First operand 813 states and 1186 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:45,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:45,982 INFO L93 Difference]: Finished difference Result 2177 states and 3208 transitions. [2021-11-19 04:29:45,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:29:45,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-19 04:29:45,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:45,985 INFO L225 Difference]: With dead ends: 2177 [2021-11-19 04:29:45,985 INFO L226 Difference]: Without dead ends: 1437 [2021-11-19 04:29:45,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:29:45,987 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 71 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:45,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 191 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:29:45,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2021-11-19 04:29:46,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 1417. [2021-11-19 04:29:46,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1417 states, 1416 states have (on average 1.4371468926553672) internal successors, (2035), 1416 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:46,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 2035 transitions. [2021-11-19 04:29:46,421 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 2035 transitions. Word has length 75 [2021-11-19 04:29:46,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:46,421 INFO L470 AbstractCegarLoop]: Abstraction has 1417 states and 2035 transitions. [2021-11-19 04:29:46,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:46,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 2035 transitions. [2021-11-19 04:29:46,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-19 04:29:46,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:46,423 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:29:46,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-19 04:29:46,424 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:46,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:46,424 INFO L85 PathProgramCache]: Analyzing trace with hash 241252331, now seen corresponding path program 1 times [2021-11-19 04:29:46,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:46,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770085098] [2021-11-19 04:29:46,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:46,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:46,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:46,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:46,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770085098] [2021-11-19 04:29:46,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770085098] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:46,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:46,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:29:46,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478833029] [2021-11-19 04:29:46,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:46,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:29:46,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:46,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:29:46,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:29:46,467 INFO L87 Difference]: Start difference. First operand 1417 states and 2035 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:47,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:47,291 INFO L93 Difference]: Finished difference Result 3961 states and 5697 transitions. [2021-11-19 04:29:47,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:29:47,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-19 04:29:47,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:47,297 INFO L225 Difference]: With dead ends: 3961 [2021-11-19 04:29:47,297 INFO L226 Difference]: Without dead ends: 2617 [2021-11-19 04:29:47,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:29:47,301 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 52 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:47,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 259 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:29:47,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2617 states. [2021-11-19 04:29:48,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2617 to 2471. [2021-11-19 04:29:48,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2471 states, 2470 states have (on average 1.4263157894736842) internal successors, (3523), 2470 states have internal predecessors, (3523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:48,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 3523 transitions. [2021-11-19 04:29:48,202 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 3523 transitions. Word has length 76 [2021-11-19 04:29:48,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:48,205 INFO L470 AbstractCegarLoop]: Abstraction has 2471 states and 3523 transitions. [2021-11-19 04:29:48,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:48,205 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 3523 transitions. [2021-11-19 04:29:48,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-19 04:29:48,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:48,207 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:29:48,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-19 04:29:48,207 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:48,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:48,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1306565925, now seen corresponding path program 1 times [2021-11-19 04:29:48,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:48,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57172940] [2021-11-19 04:29:48,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:48,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:48,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:48,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:48,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57172940] [2021-11-19 04:29:48,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57172940] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:48,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:48,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:29:48,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699887673] [2021-11-19 04:29:48,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:48,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:29:48,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:48,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:29:48,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:29:48,261 INFO L87 Difference]: Start difference. First operand 2471 states and 3523 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:50,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:50,127 INFO L93 Difference]: Finished difference Result 6979 states and 9909 transitions. [2021-11-19 04:29:50,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:29:50,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-19 04:29:50,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:50,141 INFO L225 Difference]: With dead ends: 6979 [2021-11-19 04:29:50,141 INFO L226 Difference]: Without dead ends: 4581 [2021-11-19 04:29:50,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:29:50,148 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 45 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:50,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 257 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:29:50,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4581 states. [2021-11-19 04:29:51,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4581 to 4291. [2021-11-19 04:29:51,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4291 states, 4290 states have (on average 1.4058275058275058) internal successors, (6031), 4290 states have internal predecessors, (6031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:51,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4291 states to 4291 states and 6031 transitions. [2021-11-19 04:29:51,967 INFO L78 Accepts]: Start accepts. Automaton has 4291 states and 6031 transitions. Word has length 77 [2021-11-19 04:29:51,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:51,967 INFO L470 AbstractCegarLoop]: Abstraction has 4291 states and 6031 transitions. [2021-11-19 04:29:51,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:51,968 INFO L276 IsEmpty]: Start isEmpty. Operand 4291 states and 6031 transitions. [2021-11-19 04:29:51,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-19 04:29:51,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:51,968 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:29:51,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-19 04:29:51,969 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:51,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:51,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1695604898, now seen corresponding path program 1 times [2021-11-19 04:29:51,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:51,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272727491] [2021-11-19 04:29:51,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:51,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:52,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:52,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:52,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272727491] [2021-11-19 04:29:52,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272727491] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:52,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:52,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:29:52,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660956871] [2021-11-19 04:29:52,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:52,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:29:52,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:52,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:29:52,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:29:52,044 INFO L87 Difference]: Start difference. First operand 4291 states and 6031 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:55,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:55,054 INFO L93 Difference]: Finished difference Result 7671 states and 10661 transitions. [2021-11-19 04:29:55,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:29:55,054 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-19 04:29:55,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:55,074 INFO L225 Difference]: With dead ends: 7671 [2021-11-19 04:29:55,074 INFO L226 Difference]: Without dead ends: 7669 [2021-11-19 04:29:55,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:29:55,078 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 200 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:55,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 662 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:29:55,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7669 states. [2021-11-19 04:29:56,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7669 to 4483. [2021-11-19 04:29:56,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4483 states, 4482 states have (on average 1.3795180722891567) internal successors, (6183), 4482 states have internal predecessors, (6183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:56,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4483 states to 4483 states and 6183 transitions. [2021-11-19 04:29:56,872 INFO L78 Accepts]: Start accepts. Automaton has 4483 states and 6183 transitions. Word has length 78 [2021-11-19 04:29:56,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:56,872 INFO L470 AbstractCegarLoop]: Abstraction has 4483 states and 6183 transitions. [2021-11-19 04:29:56,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:29:56,872 INFO L276 IsEmpty]: Start isEmpty. Operand 4483 states and 6183 transitions. [2021-11-19 04:29:56,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-19 04:29:56,874 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:56,874 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:29:56,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-19 04:29:56,874 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:56,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:56,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1415916470, now seen corresponding path program 1 times [2021-11-19 04:29:56,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:56,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510949619] [2021-11-19 04:29:56,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:56,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:56,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:29:56,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:56,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510949619] [2021-11-19 04:29:56,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510949619] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:56,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:56,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:29:56,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044925763] [2021-11-19 04:29:56,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:56,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:29:56,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:56,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:29:56,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:29:56,924 INFO L87 Difference]: Start difference. First operand 4483 states and 6183 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:30:00,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:30:00,187 INFO L93 Difference]: Finished difference Result 11719 states and 16153 transitions. [2021-11-19 04:30:00,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:30:00,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-19 04:30:00,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:30:00,205 INFO L225 Difference]: With dead ends: 11719 [2021-11-19 04:30:00,206 INFO L226 Difference]: Without dead ends: 7309 [2021-11-19 04:30:00,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:30:00,215 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 56 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:30:00,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 263 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:30:00,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7309 states. [2021-11-19 04:30:03,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7309 to 6731. [2021-11-19 04:30:03,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6731 states, 6730 states have (on average 1.3537890044576524) internal successors, (9111), 6730 states have internal predecessors, (9111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:30:03,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6731 states to 6731 states and 9111 transitions. [2021-11-19 04:30:03,140 INFO L78 Accepts]: Start accepts. Automaton has 6731 states and 9111 transitions. Word has length 79 [2021-11-19 04:30:03,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:30:03,141 INFO L470 AbstractCegarLoop]: Abstraction has 6731 states and 9111 transitions. [2021-11-19 04:30:03,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:30:03,141 INFO L276 IsEmpty]: Start isEmpty. Operand 6731 states and 9111 transitions. [2021-11-19 04:30:03,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-19 04:30:03,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:30:03,144 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:30:03,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-19 04:30:03,145 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:30:03,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:30:03,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1940322908, now seen corresponding path program 1 times [2021-11-19 04:30:03,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:30:03,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731026006] [2021-11-19 04:30:03,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:30:03,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:30:03,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:30:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:30:03,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:30:03,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731026006] [2021-11-19 04:30:03,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731026006] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:30:03,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:30:03,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:30:03,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968638608] [2021-11-19 04:30:03,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:30:03,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:30:03,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:30:03,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:30:03,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:30:03,202 INFO L87 Difference]: Start difference. First operand 6731 states and 9111 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:30:05,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:30:05,964 INFO L93 Difference]: Finished difference Result 13391 states and 18145 transitions. [2021-11-19 04:30:05,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:30:05,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-19 04:30:05,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:30:05,978 INFO L225 Difference]: With dead ends: 13391 [2021-11-19 04:30:05,978 INFO L226 Difference]: Without dead ends: 6733 [2021-11-19 04:30:05,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:30:05,990 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 57 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:30:05,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 235 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:30:05,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6733 states. [2021-11-19 04:30:09,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6733 to 6731. [2021-11-19 04:30:09,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6731 states, 6730 states have (on average 1.3323922734026745) internal successors, (8967), 6730 states have internal predecessors, (8967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:30:09,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6731 states to 6731 states and 8967 transitions. [2021-11-19 04:30:09,209 INFO L78 Accepts]: Start accepts. Automaton has 6731 states and 8967 transitions. Word has length 100 [2021-11-19 04:30:09,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:30:09,210 INFO L470 AbstractCegarLoop]: Abstraction has 6731 states and 8967 transitions. [2021-11-19 04:30:09,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:30:09,210 INFO L276 IsEmpty]: Start isEmpty. Operand 6731 states and 8967 transitions. [2021-11-19 04:30:09,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-19 04:30:09,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:30:09,212 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:30:09,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-19 04:30:09,213 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:30:09,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:30:09,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1124551470, now seen corresponding path program 1 times [2021-11-19 04:30:09,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:30:09,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573667389] [2021-11-19 04:30:09,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:30:09,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:30:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:30:09,514 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:30:09,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:30:09,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573667389] [2021-11-19 04:30:09,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573667389] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:30:09,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662832086] [2021-11-19 04:30:09,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:30:09,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:30:09,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:30:09,520 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:30:09,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:30:09,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:30:09,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 04:30:09,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:30:11,361 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:30:11,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:30:11,832 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:30:11,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662832086] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:30:11,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:30:11,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 18 [2021-11-19 04:30:11,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476985973] [2021-11-19 04:30:11,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:30:11,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 04:30:11,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:30:11,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 04:30:11,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:30:11,836 INFO L87 Difference]: Start difference. First operand 6731 states and 8967 transitions. Second operand has 18 states, 18 states have (on average 15.777777777777779) internal successors, (284), 18 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:30:17,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:30:17,988 INFO L93 Difference]: Finished difference Result 13805 states and 18314 transitions. [2021-11-19 04:30:17,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-19 04:30:17,989 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 15.777777777777779) internal successors, (284), 18 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-19 04:30:17,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:30:17,999 INFO L225 Difference]: With dead ends: 13805 [2021-11-19 04:30:17,999 INFO L226 Difference]: Without dead ends: 7147 [2021-11-19 04:30:18,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=253, Invalid=1007, Unknown=0, NotChecked=0, Total=1260 [2021-11-19 04:30:18,009 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 655 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:30:18,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [655 Valid, 924 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 545 Invalid, 0 Unknown, 125 Unchecked, 0.6s Time] [2021-11-19 04:30:18,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7147 states. [2021-11-19 04:30:21,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7147 to 6915. [2021-11-19 04:30:21,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6915 states, 6914 states have (on average 1.3284639861151286) internal successors, (9185), 6914 states have internal predecessors, (9185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:30:21,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6915 states to 6915 states and 9185 transitions. [2021-11-19 04:30:21,033 INFO L78 Accepts]: Start accepts. Automaton has 6915 states and 9185 transitions. Word has length 100 [2021-11-19 04:30:21,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:30:21,034 INFO L470 AbstractCegarLoop]: Abstraction has 6915 states and 9185 transitions. [2021-11-19 04:30:21,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 15.777777777777779) internal successors, (284), 18 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:30:21,034 INFO L276 IsEmpty]: Start isEmpty. Operand 6915 states and 9185 transitions. [2021-11-19 04:30:21,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 04:30:21,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:30:21,037 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:30:21,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-19 04:30:21,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-19 04:30:21,238 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:30:21,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:30:21,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1274262283, now seen corresponding path program 1 times [2021-11-19 04:30:21,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:30:21,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621628078] [2021-11-19 04:30:21,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:30:21,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:30:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:30:21,652 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:30:21,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:30:21,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621628078] [2021-11-19 04:30:21,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621628078] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:30:21,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143969204] [2021-11-19 04:30:21,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:30:21,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:30:21,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:30:21,660 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:30:21,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:30:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:30:21,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 04:30:21,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:30:22,648 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:30:22,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:30:23,098 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:30:23,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143969204] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:30:23,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:30:23,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 18 [2021-11-19 04:30:23,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337987888] [2021-11-19 04:30:23,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:30:23,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 04:30:23,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:30:23,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 04:30:23,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:30:23,102 INFO L87 Difference]: Start difference. First operand 6915 states and 9185 transitions. Second operand has 18 states, 18 states have (on average 15.944444444444445) internal successors, (287), 18 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:30:53,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:30:53,744 INFO L93 Difference]: Finished difference Result 50193 states and 64996 transitions. [2021-11-19 04:30:53,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-11-19 04:30:53,746 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 15.944444444444445) internal successors, (287), 18 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-19 04:30:53,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:30:53,818 INFO L225 Difference]: With dead ends: 50193 [2021-11-19 04:30:53,818 INFO L226 Difference]: Without dead ends: 43535 [2021-11-19 04:30:53,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3523 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1912, Invalid=8594, Unknown=0, NotChecked=0, Total=10506 [2021-11-19 04:30:53,838 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 2720 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2720 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 1804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:30:53,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2720 Valid, 1257 Invalid, 1804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1598 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-19 04:30:53,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43535 states. [2021-11-19 04:31:02,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43535 to 17063. [2021-11-19 04:31:02,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17063 states, 17062 states have (on average 1.328625014652444) internal successors, (22669), 17062 states have internal predecessors, (22669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:31:02,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17063 states to 17063 states and 22669 transitions. [2021-11-19 04:31:02,875 INFO L78 Accepts]: Start accepts. Automaton has 17063 states and 22669 transitions. Word has length 101 [2021-11-19 04:31:02,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:31:02,876 INFO L470 AbstractCegarLoop]: Abstraction has 17063 states and 22669 transitions. [2021-11-19 04:31:02,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 15.944444444444445) internal successors, (287), 18 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:31:02,877 INFO L276 IsEmpty]: Start isEmpty. Operand 17063 states and 22669 transitions. [2021-11-19 04:31:02,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 04:31:02,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:31:02,882 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:31:02,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:31:03,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-19 04:31:03,109 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:31:03,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:31:03,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1589646215, now seen corresponding path program 1 times [2021-11-19 04:31:03,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:31:03,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921328408] [2021-11-19 04:31:03,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:31:03,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:31:03,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:31:03,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:31:03,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:31:03,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921328408] [2021-11-19 04:31:03,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921328408] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:31:03,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160000803] [2021-11-19 04:31:03,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:31:03,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:31:03,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:31:03,453 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:31:03,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:31:03,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:31:03,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 04:31:03,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:31:25,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:31:25,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:31:28,644 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:31:28,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160000803] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:31:28,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:31:28,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2021-11-19 04:31:28,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079405203] [2021-11-19 04:31:28,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:31:28,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-19 04:31:28,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:31:28,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-19 04:31:28,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=414, Unknown=9, NotChecked=0, Total=506 [2021-11-19 04:31:28,647 INFO L87 Difference]: Start difference. First operand 17063 states and 22669 transitions. Second operand has 23 states, 23 states have (on average 9.434782608695652) internal successors, (217), 22 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:31:45,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:31:45,219 INFO L93 Difference]: Finished difference Result 34479 states and 45493 transitions. [2021-11-19 04:31:45,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 04:31:45,220 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 9.434782608695652) internal successors, (217), 22 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-19 04:31:45,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:31:45,247 INFO L225 Difference]: With dead ends: 34479 [2021-11-19 04:31:45,247 INFO L226 Difference]: Without dead ends: 18241 [2021-11-19 04:31:45,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 186 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=196, Invalid=784, Unknown=12, NotChecked=0, Total=992 [2021-11-19 04:31:45,265 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 424 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 265 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:31:45,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 849 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 297 Invalid, 0 Unknown, 265 Unchecked, 0.3s Time] [2021-11-19 04:31:45,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18241 states. [2021-11-19 04:31:52,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18241 to 17139. [2021-11-19 04:31:52,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17139 states, 17138 states have (on average 1.3281012953670206) internal successors, (22761), 17138 states have internal predecessors, (22761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:31:52,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17139 states to 17139 states and 22761 transitions. [2021-11-19 04:31:52,695 INFO L78 Accepts]: Start accepts. Automaton has 17139 states and 22761 transitions. Word has length 101 [2021-11-19 04:31:52,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:31:52,696 INFO L470 AbstractCegarLoop]: Abstraction has 17139 states and 22761 transitions. [2021-11-19 04:31:52,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.434782608695652) internal successors, (217), 22 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:31:52,696 INFO L276 IsEmpty]: Start isEmpty. Operand 17139 states and 22761 transitions. [2021-11-19 04:31:52,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 04:31:52,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:31:52,701 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:31:52,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 04:31:52,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:31:52,917 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:31:52,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:31:52,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1543942337, now seen corresponding path program 1 times [2021-11-19 04:31:52,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:31:52,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990016853] [2021-11-19 04:31:52,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:31:52,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:31:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:31:53,273 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:31:53,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:31:53,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990016853] [2021-11-19 04:31:53,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990016853] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:31:53,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747086240] [2021-11-19 04:31:53,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:31:53,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:31:53,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:31:53,275 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:31:53,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eba6be9-a40a-4667-8116-5b61c907af72/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 04:31:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:31:53,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-19 04:31:53,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:32:59,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:32:59,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:33:57,231 WARN L227 SmtUtils]: Spent 51.78s on a formula simplification. DAG size of input: 5576 DAG size of output: 869 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-19 04:33:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:33:58,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747086240] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:33:58,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:33:58,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 18] total 47 [2021-11-19 04:33:58,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405587420] [2021-11-19 04:33:58,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:33:58,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-19 04:33:58,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:33:58,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-19 04:33:58,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1987, Unknown=31, NotChecked=0, Total=2162 [2021-11-19 04:33:58,578 INFO L87 Difference]: Start difference. First operand 17139 states and 22761 transitions. Second operand has 47 states, 47 states have (on average 6.1063829787234045) internal successors, (287), 47 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)