./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba69c58-0eee-426f-be47-38dcfed69a2c/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba69c58-0eee-426f-be47-38dcfed69a2c/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba69c58-0eee-426f-be47-38dcfed69a2c/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba69c58-0eee-426f-be47-38dcfed69a2c/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba69c58-0eee-426f-be47-38dcfed69a2c/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba69c58-0eee-426f-be47-38dcfed69a2c/bin/uautomizer-DQz5hQGWxF --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 291c2115713bbaa0f9f6deebfd096e226de91dfa7091a11105c0815d1cda6526 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:46:32,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:46:32,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:46:32,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:46:32,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:46:32,969 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:46:32,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:46:32,977 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:46:32,980 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:46:32,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:46:32,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:46:32,995 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:46:32,996 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:46:33,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:46:33,004 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:46:33,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:46:33,013 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:46:33,015 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:46:33,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:46:33,028 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:46:33,031 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:46:33,033 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:46:33,037 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:46:33,038 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:46:33,050 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:46:33,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:46:33,051 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:46:33,054 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:46:33,055 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:46:33,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:46:33,058 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:46:33,059 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:46:33,062 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:46:33,064 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:46:33,066 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:46:33,066 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:46:33,067 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:46:33,068 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:46:33,068 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:46:33,069 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:46:33,070 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:46:33,072 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba69c58-0eee-426f-be47-38dcfed69a2c/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:46:33,127 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:46:33,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:46:33,128 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:46:33,128 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:46:33,137 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:46:33,138 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:46:33,139 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:46:33,139 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:46:33,140 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:46:33,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:46:33,142 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:46:33,142 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:46:33,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:46:33,143 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:46:33,143 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:46:33,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:46:33,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:46:33,144 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:46:33,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:46:33,144 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:46:33,145 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:46:33,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:46:33,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:46:33,146 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:46:33,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:46:33,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:46:33,147 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:46:33,147 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:46:33,147 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:46:33,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:46:33,150 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:46:33,150 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:46:33,150 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:46:33,151 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:46:33,151 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_7ba69c58-0eee-426f-be47-38dcfed69a2c/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba69c58-0eee-426f-be47-38dcfed69a2c/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 291c2115713bbaa0f9f6deebfd096e226de91dfa7091a11105c0815d1cda6526 [2021-11-20 06:46:33,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:46:33,526 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:46:33,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:46:33,531 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:46:33,532 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:46:33,534 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba69c58-0eee-426f-be47-38dcfed69a2c/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-20 06:46:33,626 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba69c58-0eee-426f-be47-38dcfed69a2c/bin/uautomizer-DQz5hQGWxF/data/c430767f2/76a66faab614481bb4aeb337ed4070d7/FLAG69f216ebf [2021-11-20 06:46:34,254 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:46:34,255 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba69c58-0eee-426f-be47-38dcfed69a2c/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-20 06:46:34,289 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba69c58-0eee-426f-be47-38dcfed69a2c/bin/uautomizer-DQz5hQGWxF/data/c430767f2/76a66faab614481bb4aeb337ed4070d7/FLAG69f216ebf [2021-11-20 06:46:34,539 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba69c58-0eee-426f-be47-38dcfed69a2c/bin/uautomizer-DQz5hQGWxF/data/c430767f2/76a66faab614481bb4aeb337ed4070d7 [2021-11-20 06:46:34,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:46:34,545 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:46:34,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:46:34,548 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:46:34,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:46:34,553 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:46:34" (1/1) ... [2021-11-20 06:46:34,555 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c26180a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:46:34, skipping insertion in model container [2021-11-20 06:46:34,556 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:46:34" (1/1) ... [2021-11-20 06:46:34,577 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:46:34,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:46:34,959 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_7ba69c58-0eee-426f-be47-38dcfed69a2c/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7181,7194] [2021-11-20 06:46:35,018 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:46:35,035 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:46:35,095 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_7ba69c58-0eee-426f-be47-38dcfed69a2c/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7181,7194] [2021-11-20 06:46:35,134 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:46:35,164 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:46:35,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:46:35 WrapperNode [2021-11-20 06:46:35,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:46:35,167 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:46:35,167 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:46:35,167 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:46:35,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:46:35" (1/1) ... [2021-11-20 06:46:35,209 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:46:35" (1/1) ... [2021-11-20 06:46:35,294 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 572 [2021-11-20 06:46:35,294 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:46:35,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:46:35,295 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:46:35,295 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:46:35,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:46:35" (1/1) ... [2021-11-20 06:46:35,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:46:35" (1/1) ... [2021-11-20 06:46:35,313 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:46:35" (1/1) ... [2021-11-20 06:46:35,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:46:35" (1/1) ... [2021-11-20 06:46:35,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:46:35" (1/1) ... [2021-11-20 06:46:35,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:46:35" (1/1) ... [2021-11-20 06:46:35,353 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:46:35" (1/1) ... [2021-11-20 06:46:35,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:46:35,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:46:35,359 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:46:35,359 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:46:35,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:46:35" (1/1) ... [2021-11-20 06:46:35,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:46:35,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba69c58-0eee-426f-be47-38dcfed69a2c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:46:35,408 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba69c58-0eee-426f-be47-38dcfed69a2c/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:46:35,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ba69c58-0eee-426f-be47-38dcfed69a2c/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:46:35,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:46:35,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:46:35,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:46:35,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:46:35,601 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:46:35,603 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:46:36,319 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:46:36,346 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:46:36,346 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 06:46:36,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:46:36 BoogieIcfgContainer [2021-11-20 06:46:36,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:46:36,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:46:36,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:46:36,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:46:36,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:46:34" (1/3) ... [2021-11-20 06:46:36,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1741b56a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:46:36, skipping insertion in model container [2021-11-20 06:46:36,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:46:35" (2/3) ... [2021-11-20 06:46:36,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1741b56a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:46:36, skipping insertion in model container [2021-11-20 06:46:36,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:46:36" (3/3) ... [2021-11-20 06:46:36,376 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-20 06:46:36,392 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:46:36,393 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:46:36,485 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:46:36,494 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 [2021-11-20 06:46:36,494 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:46:36,524 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 132 states have (on average 1.75) internal successors, (231), 133 states have internal predecessors, (231), 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) [2021-11-20 06:46:36,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-20 06:46:36,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:36,537 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] [2021-11-20 06:46:36,537 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:36,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:36,545 INFO L85 PathProgramCache]: Analyzing trace with hash -278043806, now seen corresponding path program 1 times [2021-11-20 06:46:36,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:36,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844829017] [2021-11-20 06:46:36,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:36,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:36,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:37,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:46:37,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:37,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844829017] [2021-11-20 06:46:37,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844829017] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:37,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:37,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:46:37,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068411019] [2021-11-20 06:46:37,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:37,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:46:37,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:37,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:46:37,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:46:37,183 INFO L87 Difference]: Start difference. First operand has 134 states, 132 states have (on average 1.75) internal successors, (231), 133 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 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) [2021-11-20 06:46:37,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:37,387 INFO L93 Difference]: Finished difference Result 297 states and 500 transitions. [2021-11-20 06:46:37,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:46:37,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 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 [2021-11-20 06:46:37,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:37,407 INFO L225 Difference]: With dead ends: 297 [2021-11-20 06:46:37,408 INFO L226 Difference]: Without dead ends: 205 [2021-11-20 06:46:37,412 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 [2021-11-20 06:46:37,417 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 132 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:37,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 406 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:46:37,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-20 06:46:37,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 202. [2021-11-20 06:46:37,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.5970149253731343) internal successors, (321), 201 states have internal predecessors, (321), 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) [2021-11-20 06:46:37,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 321 transitions. [2021-11-20 06:46:37,521 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 321 transitions. Word has length 50 [2021-11-20 06:46:37,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:37,524 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 321 transitions. [2021-11-20 06:46:37,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 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) [2021-11-20 06:46:37,525 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 321 transitions. [2021-11-20 06:46:37,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 06:46:37,532 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:37,532 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] [2021-11-20 06:46:37,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:46:37,534 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:37,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:37,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1333847823, now seen corresponding path program 1 times [2021-11-20 06:46:37,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:37,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559405684] [2021-11-20 06:46:37,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:37,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:37,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:37,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:46:37,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:37,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559405684] [2021-11-20 06:46:37,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559405684] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:37,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:37,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:46:37,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516407639] [2021-11-20 06:46:37,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:37,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:46:37,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:37,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:46:37,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:46:37,726 INFO L87 Difference]: Start difference. First operand 202 states and 321 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 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) [2021-11-20 06:46:37,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:37,839 INFO L93 Difference]: Finished difference Result 496 states and 805 transitions. [2021-11-20 06:46:37,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:46:37,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 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 [2021-11-20 06:46:37,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:37,845 INFO L225 Difference]: With dead ends: 496 [2021-11-20 06:46:37,845 INFO L226 Difference]: Without dead ends: 342 [2021-11-20 06:46:37,847 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 [2021-11-20 06:46:37,849 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 118 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:37,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 385 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:46:37,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-11-20 06:46:37,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 338. [2021-11-20 06:46:37,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 1.6112759643916914) internal successors, (543), 337 states have internal predecessors, (543), 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) [2021-11-20 06:46:37,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 543 transitions. [2021-11-20 06:46:37,912 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 543 transitions. Word has length 52 [2021-11-20 06:46:37,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:37,913 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 543 transitions. [2021-11-20 06:46:37,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 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) [2021-11-20 06:46:37,915 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 543 transitions. [2021-11-20 06:46:37,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 06:46:37,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:37,920 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] [2021-11-20 06:46:37,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:46:37,924 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:37,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:37,926 INFO L85 PathProgramCache]: Analyzing trace with hash 329846722, now seen corresponding path program 1 times [2021-11-20 06:46:37,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:37,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063044705] [2021-11-20 06:46:37,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:37,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:37,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:46:38,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:38,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063044705] [2021-11-20 06:46:38,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063044705] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:38,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:38,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:46:38,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834389042] [2021-11-20 06:46:38,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:38,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:46:38,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:38,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:46:38,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:46:38,112 INFO L87 Difference]: Start difference. First operand 338 states and 543 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 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) [2021-11-20 06:46:38,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:38,212 INFO L93 Difference]: Finished difference Result 890 states and 1445 transitions. [2021-11-20 06:46:38,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:46:38,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 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 [2021-11-20 06:46:38,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:38,219 INFO L225 Difference]: With dead ends: 890 [2021-11-20 06:46:38,219 INFO L226 Difference]: Without dead ends: 600 [2021-11-20 06:46:38,222 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 [2021-11-20 06:46:38,224 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 113 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:38,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 386 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:46:38,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-11-20 06:46:38,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 594. [2021-11-20 06:46:38,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 1.6104553119730185) internal successors, (955), 593 states have internal predecessors, (955), 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) [2021-11-20 06:46:38,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 955 transitions. [2021-11-20 06:46:38,337 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 955 transitions. Word has length 54 [2021-11-20 06:46:38,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:38,338 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 955 transitions. [2021-11-20 06:46:38,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 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) [2021-11-20 06:46:38,339 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 955 transitions. [2021-11-20 06:46:38,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 06:46:38,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:38,343 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] [2021-11-20 06:46:38,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:46:38,343 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:38,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:38,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1296814383, now seen corresponding path program 1 times [2021-11-20 06:46:38,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:38,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873129826] [2021-11-20 06:46:38,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:38,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:38,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:46:38,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:38,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873129826] [2021-11-20 06:46:38,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873129826] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:38,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:38,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:46:38,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999979004] [2021-11-20 06:46:38,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:38,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:46:38,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:38,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:46:38,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:46:38,490 INFO L87 Difference]: Start difference. First operand 594 states and 955 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 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) [2021-11-20 06:46:38,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:38,820 INFO L93 Difference]: Finished difference Result 2582 states and 4241 transitions. [2021-11-20 06:46:38,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:46:38,821 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 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 [2021-11-20 06:46:38,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:38,839 INFO L225 Difference]: With dead ends: 2582 [2021-11-20 06:46:38,839 INFO L226 Difference]: Without dead ends: 2036 [2021-11-20 06:46:38,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:46:38,846 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 851 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 1294 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:38,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 1294 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:46:38,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-11-20 06:46:39,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1071. [2021-11-20 06:46:39,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 1070 states have (on average 1.6196261682242992) internal successors, (1733), 1070 states have internal predecessors, (1733), 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) [2021-11-20 06:46:39,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1733 transitions. [2021-11-20 06:46:39,013 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1733 transitions. Word has length 56 [2021-11-20 06:46:39,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:39,016 INFO L470 AbstractCegarLoop]: Abstraction has 1071 states and 1733 transitions. [2021-11-20 06:46:39,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 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) [2021-11-20 06:46:39,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1733 transitions. [2021-11-20 06:46:39,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 06:46:39,028 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:39,029 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] [2021-11-20 06:46:39,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:46:39,030 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:39,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:39,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1484036003, now seen corresponding path program 1 times [2021-11-20 06:46:39,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:39,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509078081] [2021-11-20 06:46:39,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:39,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:39,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:46:39,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:39,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509078081] [2021-11-20 06:46:39,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509078081] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:39,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:39,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:46:39,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980242077] [2021-11-20 06:46:39,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:39,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:46:39,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:39,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:46:39,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:46:39,158 INFO L87 Difference]: Start difference. First operand 1071 states and 1733 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 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) [2021-11-20 06:46:39,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:39,409 INFO L93 Difference]: Finished difference Result 3136 states and 5140 transitions. [2021-11-20 06:46:39,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:46:39,410 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 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 [2021-11-20 06:46:39,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:39,430 INFO L225 Difference]: With dead ends: 3136 [2021-11-20 06:46:39,431 INFO L226 Difference]: Without dead ends: 2113 [2021-11-20 06:46:39,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:46:39,445 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 404 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:39,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 606 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:46:39,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2021-11-20 06:46:39,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1583. [2021-11-20 06:46:39,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 1.6270543615676358) internal successors, (2574), 1582 states have internal predecessors, (2574), 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) [2021-11-20 06:46:39,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 2574 transitions. [2021-11-20 06:46:39,622 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 2574 transitions. Word has length 57 [2021-11-20 06:46:39,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:39,624 INFO L470 AbstractCegarLoop]: Abstraction has 1583 states and 2574 transitions. [2021-11-20 06:46:39,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 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) [2021-11-20 06:46:39,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 2574 transitions. [2021-11-20 06:46:39,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 06:46:39,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:39,630 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, 1, 1, 1, 1, 1, 1] [2021-11-20 06:46:39,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:46:39,631 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:39,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:39,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1297470346, now seen corresponding path program 1 times [2021-11-20 06:46:39,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:39,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373300143] [2021-11-20 06:46:39,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:39,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:39,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:39,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:46:39,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:39,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373300143] [2021-11-20 06:46:39,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373300143] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:39,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:39,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:46:39,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797080779] [2021-11-20 06:46:39,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:39,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:46:39,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:39,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:46:39,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:46:39,755 INFO L87 Difference]: Start difference. First operand 1583 states and 2574 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-11-20 06:46:40,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:40,101 INFO L93 Difference]: Finished difference Result 4604 states and 7538 transitions. [2021-11-20 06:46:40,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:46:40,102 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 58 [2021-11-20 06:46:40,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:40,129 INFO L225 Difference]: With dead ends: 4604 [2021-11-20 06:46:40,129 INFO L226 Difference]: Without dead ends: 3069 [2021-11-20 06:46:40,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:46:40,141 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 402 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:40,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 649 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:46:40,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2021-11-20 06:46:40,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 2314. [2021-11-20 06:46:40,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2314 states, 2313 states have (on average 1.6260268050151319) internal successors, (3761), 2313 states have internal predecessors, (3761), 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) [2021-11-20 06:46:40,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 3761 transitions. [2021-11-20 06:46:40,389 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 3761 transitions. Word has length 58 [2021-11-20 06:46:40,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:40,391 INFO L470 AbstractCegarLoop]: Abstraction has 2314 states and 3761 transitions. [2021-11-20 06:46:40,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2021-11-20 06:46:40,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 3761 transitions. [2021-11-20 06:46:40,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 06:46:40,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:40,395 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] [2021-11-20 06:46:40,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:46:40,396 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:40,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:40,397 INFO L85 PathProgramCache]: Analyzing trace with hash -370820470, now seen corresponding path program 1 times [2021-11-20 06:46:40,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:40,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777125164] [2021-11-20 06:46:40,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:40,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:40,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:46:40,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:40,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777125164] [2021-11-20 06:46:40,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777125164] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:40,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:40,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:46:40,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039690440] [2021-11-20 06:46:40,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:40,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:46:40,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:40,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:46:40,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:46:40,483 INFO L87 Difference]: Start difference. First operand 2314 states and 3761 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2021-11-20 06:46:40,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:40,784 INFO L93 Difference]: Finished difference Result 5104 states and 8336 transitions. [2021-11-20 06:46:40,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:46:40,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 59 [2021-11-20 06:46:40,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:40,810 INFO L225 Difference]: With dead ends: 5104 [2021-11-20 06:46:40,811 INFO L226 Difference]: Without dead ends: 3495 [2021-11-20 06:46:40,817 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 [2021-11-20 06:46:40,821 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 117 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:40,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 451 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:46:40,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3495 states. [2021-11-20 06:46:41,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3495 to 3493. [2021-11-20 06:46:41,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3493 states, 3492 states have (on average 1.622852233676976) internal successors, (5667), 3492 states have internal predecessors, (5667), 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) [2021-11-20 06:46:41,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3493 states to 3493 states and 5667 transitions. [2021-11-20 06:46:41,172 INFO L78 Accepts]: Start accepts. Automaton has 3493 states and 5667 transitions. Word has length 59 [2021-11-20 06:46:41,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:41,172 INFO L470 AbstractCegarLoop]: Abstraction has 3493 states and 5667 transitions. [2021-11-20 06:46:41,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2021-11-20 06:46:41,173 INFO L276 IsEmpty]: Start isEmpty. Operand 3493 states and 5667 transitions. [2021-11-20 06:46:41,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 06:46:41,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:41,174 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] [2021-11-20 06:46:41,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 06:46:41,175 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:41,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:41,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1594203451, now seen corresponding path program 1 times [2021-11-20 06:46:41,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:41,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778723891] [2021-11-20 06:46:41,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:41,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:41,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:46:41,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:41,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778723891] [2021-11-20 06:46:41,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778723891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:41,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:41,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:46:41,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565406124] [2021-11-20 06:46:41,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:41,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:46:41,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:41,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:46:41,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:46:41,252 INFO L87 Difference]: Start difference. First operand 3493 states and 5667 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2021-11-20 06:46:41,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:41,676 INFO L93 Difference]: Finished difference Result 6911 states and 11267 transitions. [2021-11-20 06:46:41,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:46:41,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 59 [2021-11-20 06:46:41,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:41,716 INFO L225 Difference]: With dead ends: 6911 [2021-11-20 06:46:41,717 INFO L226 Difference]: Without dead ends: 4911 [2021-11-20 06:46:41,722 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 [2021-11-20 06:46:41,723 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 112 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:41,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 434 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:46:41,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4911 states. [2021-11-20 06:46:42,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4911 to 4909. [2021-11-20 06:46:42,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4909 states, 4908 states have (on average 1.6187856560717195) internal successors, (7945), 4908 states have internal predecessors, (7945), 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) [2021-11-20 06:46:42,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4909 states to 4909 states and 7945 transitions. [2021-11-20 06:46:42,200 INFO L78 Accepts]: Start accepts. Automaton has 4909 states and 7945 transitions. Word has length 59 [2021-11-20 06:46:42,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:42,201 INFO L470 AbstractCegarLoop]: Abstraction has 4909 states and 7945 transitions. [2021-11-20 06:46:42,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2021-11-20 06:46:42,202 INFO L276 IsEmpty]: Start isEmpty. Operand 4909 states and 7945 transitions. [2021-11-20 06:46:42,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 06:46:42,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:42,203 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] [2021-11-20 06:46:42,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 06:46:42,204 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:42,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:42,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1620263222, now seen corresponding path program 1 times [2021-11-20 06:46:42,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:42,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618819367] [2021-11-20 06:46:42,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:42,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:46:42,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:42,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618819367] [2021-11-20 06:46:42,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618819367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:42,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:42,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:46:42,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311960610] [2021-11-20 06:46:42,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:42,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:46:42,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:42,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:46:42,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:46:42,275 INFO L87 Difference]: Start difference. First operand 4909 states and 7945 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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) [2021-11-20 06:46:43,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:43,110 INFO L93 Difference]: Finished difference Result 15138 states and 24625 transitions. [2021-11-20 06:46:43,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:46:43,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 59 [2021-11-20 06:46:43,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:43,206 INFO L225 Difference]: With dead ends: 15138 [2021-11-20 06:46:43,206 INFO L226 Difference]: Without dead ends: 10357 [2021-11-20 06:46:43,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:46:43,221 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 400 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:43,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 565 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:46:43,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10357 states. [2021-11-20 06:46:43,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10357 to 7607. [2021-11-20 06:46:43,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7607 states, 7606 states have (on average 1.6149092821456745) internal successors, (12283), 7606 states have internal predecessors, (12283), 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) [2021-11-20 06:46:44,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7607 states to 7607 states and 12283 transitions. [2021-11-20 06:46:44,029 INFO L78 Accepts]: Start accepts. Automaton has 7607 states and 12283 transitions. Word has length 59 [2021-11-20 06:46:44,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:44,029 INFO L470 AbstractCegarLoop]: Abstraction has 7607 states and 12283 transitions. [2021-11-20 06:46:44,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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) [2021-11-20 06:46:44,030 INFO L276 IsEmpty]: Start isEmpty. Operand 7607 states and 12283 transitions. [2021-11-20 06:46:44,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 06:46:44,031 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:44,031 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] [2021-11-20 06:46:44,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 06:46:44,032 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:44,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:44,033 INFO L85 PathProgramCache]: Analyzing trace with hash -515214271, now seen corresponding path program 1 times [2021-11-20 06:46:44,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:44,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808582680] [2021-11-20 06:46:44,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:44,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:44,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:44,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:46:44,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:44,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808582680] [2021-11-20 06:46:44,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808582680] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:44,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:44,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:46:44,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600398371] [2021-11-20 06:46:44,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:44,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:46:44,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:44,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:46:44,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:46:44,086 INFO L87 Difference]: Start difference. First operand 7607 states and 12283 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2021-11-20 06:46:45,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:45,006 INFO L93 Difference]: Finished difference Result 16681 states and 27278 transitions. [2021-11-20 06:46:45,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:46:45,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 59 [2021-11-20 06:46:45,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:45,063 INFO L225 Difference]: With dead ends: 16681 [2021-11-20 06:46:45,063 INFO L226 Difference]: Without dead ends: 11156 [2021-11-20 06:46:45,079 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 [2021-11-20 06:46:45,080 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 122 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:45,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 477 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:46:45,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11156 states. [2021-11-20 06:46:46,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11156 to 11154. [2021-11-20 06:46:46,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11154 states, 11153 states have (on average 1.6192055949072) internal successors, (18059), 11153 states have internal predecessors, (18059), 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) [2021-11-20 06:46:46,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11154 states to 11154 states and 18059 transitions. [2021-11-20 06:46:46,153 INFO L78 Accepts]: Start accepts. Automaton has 11154 states and 18059 transitions. Word has length 59 [2021-11-20 06:46:46,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:46,153 INFO L470 AbstractCegarLoop]: Abstraction has 11154 states and 18059 transitions. [2021-11-20 06:46:46,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2021-11-20 06:46:46,154 INFO L276 IsEmpty]: Start isEmpty. Operand 11154 states and 18059 transitions. [2021-11-20 06:46:46,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-20 06:46:46,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:46,155 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] [2021-11-20 06:46:46,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 06:46:46,156 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:46,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:46,157 INFO L85 PathProgramCache]: Analyzing trace with hash 482860251, now seen corresponding path program 1 times [2021-11-20 06:46:46,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:46,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304964449] [2021-11-20 06:46:46,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:46,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:46,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:46,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:46:46,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:46,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304964449] [2021-11-20 06:46:46,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304964449] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:46,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:46,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:46:46,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145812051] [2021-11-20 06:46:46,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:46,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:46:46,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:46,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:46:46,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:46:46,312 INFO L87 Difference]: Start difference. First operand 11154 states and 18059 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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) [2021-11-20 06:46:47,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:47,392 INFO L93 Difference]: Finished difference Result 22235 states and 36014 transitions. [2021-11-20 06:46:47,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:46:47,403 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 61 [2021-11-20 06:46:47,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:47,443 INFO L225 Difference]: With dead ends: 22235 [2021-11-20 06:46:47,443 INFO L226 Difference]: Without dead ends: 11156 [2021-11-20 06:46:47,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:46:47,465 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 285 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:47,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 559 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:46:47,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11156 states. [2021-11-20 06:46:48,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11156 to 11154. [2021-11-20 06:46:48,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11154 states, 11153 states have (on average 1.6079978481126154) internal successors, (17934), 11153 states have internal predecessors, (17934), 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) [2021-11-20 06:46:48,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11154 states to 11154 states and 17934 transitions. [2021-11-20 06:46:48,269 INFO L78 Accepts]: Start accepts. Automaton has 11154 states and 17934 transitions. Word has length 61 [2021-11-20 06:46:48,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:48,269 INFO L470 AbstractCegarLoop]: Abstraction has 11154 states and 17934 transitions. [2021-11-20 06:46:48,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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) [2021-11-20 06:46:48,270 INFO L276 IsEmpty]: Start isEmpty. Operand 11154 states and 17934 transitions. [2021-11-20 06:46:48,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-20 06:46:48,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:48,271 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] [2021-11-20 06:46:48,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 06:46:48,272 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:48,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:48,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1004302872, now seen corresponding path program 1 times [2021-11-20 06:46:48,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:48,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968455037] [2021-11-20 06:46:48,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:48,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:48,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:46:48,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:48,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968455037] [2021-11-20 06:46:48,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968455037] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:48,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:48,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:46:48,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702318170] [2021-11-20 06:46:48,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:48,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:46:48,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:48,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:46:48,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:46:48,420 INFO L87 Difference]: Start difference. First operand 11154 states and 17934 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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) [2021-11-20 06:46:49,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:49,960 INFO L93 Difference]: Finished difference Result 31937 states and 51506 transitions. [2021-11-20 06:46:49,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:46:49,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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 64 [2021-11-20 06:46:49,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:50,042 INFO L225 Difference]: With dead ends: 31937 [2021-11-20 06:46:50,043 INFO L226 Difference]: Without dead ends: 20858 [2021-11-20 06:46:50,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:46:50,069 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 392 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:50,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 567 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:46:50,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20858 states. [2021-11-20 06:46:51,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20858 to 20856. [2021-11-20 06:46:51,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20856 states, 20855 states have (on average 1.596116039319108) internal successors, (33287), 20855 states have internal predecessors, (33287), 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) [2021-11-20 06:46:51,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20856 states to 20856 states and 33287 transitions. [2021-11-20 06:46:51,498 INFO L78 Accepts]: Start accepts. Automaton has 20856 states and 33287 transitions. Word has length 64 [2021-11-20 06:46:51,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:51,499 INFO L470 AbstractCegarLoop]: Abstraction has 20856 states and 33287 transitions. [2021-11-20 06:46:51,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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) [2021-11-20 06:46:51,499 INFO L276 IsEmpty]: Start isEmpty. Operand 20856 states and 33287 transitions. [2021-11-20 06:46:51,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-20 06:46:51,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:51,501 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] [2021-11-20 06:46:51,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 06:46:51,501 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:51,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:51,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1070527272, now seen corresponding path program 1 times [2021-11-20 06:46:51,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:51,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880129810] [2021-11-20 06:46:51,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:51,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:51,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:46:51,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:51,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880129810] [2021-11-20 06:46:51,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880129810] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:51,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:51,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:46:51,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157549463] [2021-11-20 06:46:51,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:51,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:46:51,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:51,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:46:51,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:46:51,646 INFO L87 Difference]: Start difference. First operand 20856 states and 33287 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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) [2021-11-20 06:46:54,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:54,113 INFO L93 Difference]: Finished difference Result 39968 states and 63509 transitions. [2021-11-20 06:46:54,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:46:54,115 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 65 [2021-11-20 06:46:54,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:54,233 INFO L225 Difference]: With dead ends: 39968 [2021-11-20 06:46:54,234 INFO L226 Difference]: Without dead ends: 39966 [2021-11-20 06:46:54,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:46:54,246 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 250 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:46:54,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 956 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:46:54,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39966 states. [2021-11-20 06:46:56,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39966 to 21580. [2021-11-20 06:46:56,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21580 states, 21579 states have (on average 1.5756985958570833) internal successors, (34002), 21579 states have internal predecessors, (34002), 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) [2021-11-20 06:46:56,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21580 states to 21580 states and 34002 transitions. [2021-11-20 06:46:56,479 INFO L78 Accepts]: Start accepts. Automaton has 21580 states and 34002 transitions. Word has length 65 [2021-11-20 06:46:56,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:46:56,479 INFO L470 AbstractCegarLoop]: Abstraction has 21580 states and 34002 transitions. [2021-11-20 06:46:56,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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) [2021-11-20 06:46:56,479 INFO L276 IsEmpty]: Start isEmpty. Operand 21580 states and 34002 transitions. [2021-11-20 06:46:56,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-20 06:46:56,482 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:46:56,482 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] [2021-11-20 06:46:56,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 06:46:56,483 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:46:56,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:46:56,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1104420716, now seen corresponding path program 1 times [2021-11-20 06:46:56,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:46:56,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102500511] [2021-11-20 06:46:56,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:46:56,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:46:56,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:46:56,573 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:46:56,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:46:56,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102500511] [2021-11-20 06:46:56,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102500511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:46:56,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:46:56,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:46:56,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49667690] [2021-11-20 06:46:56,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:46:56,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:46:56,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:46:56,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:46:56,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:46:56,577 INFO L87 Difference]: Start difference. First operand 21580 states and 34002 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:46:59,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:46:59,903 INFO L93 Difference]: Finished difference Result 52596 states and 83206 transitions. [2021-11-20 06:46:59,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:46:59,904 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-20 06:46:59,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:46:59,995 INFO L225 Difference]: With dead ends: 52596 [2021-11-20 06:46:59,995 INFO L226 Difference]: Without dead ends: 42404 [2021-11-20 06:47:00,017 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 [2021-11-20 06:47:00,018 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 509 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:00,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 976 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:47:00,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42404 states. [2021-11-20 06:47:02,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42404 to 33114. [2021-11-20 06:47:02,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33114 states, 33113 states have (on average 1.5749101561320327) internal successors, (52150), 33113 states have internal predecessors, (52150), 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) [2021-11-20 06:47:02,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33114 states to 33114 states and 52150 transitions. [2021-11-20 06:47:02,840 INFO L78 Accepts]: Start accepts. Automaton has 33114 states and 52150 transitions. Word has length 87 [2021-11-20 06:47:02,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:47:02,841 INFO L470 AbstractCegarLoop]: Abstraction has 33114 states and 52150 transitions. [2021-11-20 06:47:02,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:47:02,841 INFO L276 IsEmpty]: Start isEmpty. Operand 33114 states and 52150 transitions. [2021-11-20 06:47:02,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-20 06:47:02,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:47:02,845 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] [2021-11-20 06:47:02,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 06:47:02,845 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:47:02,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:47:02,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1225522659, now seen corresponding path program 1 times [2021-11-20 06:47:02,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:47:02,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663466505] [2021-11-20 06:47:02,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:02,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:47:02,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:02,924 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:47:02,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:47:02,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663466505] [2021-11-20 06:47:02,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663466505] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:47:02,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:47:02,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:47:02,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709390535] [2021-11-20 06:47:02,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:47:02,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:47:02,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:47:02,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:47:02,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:47:02,928 INFO L87 Difference]: Start difference. First operand 33114 states and 52150 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 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) [2021-11-20 06:47:06,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:47:06,541 INFO L93 Difference]: Finished difference Result 56648 states and 89642 transitions. [2021-11-20 06:47:06,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:47:06,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 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 87 [2021-11-20 06:47:06,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:47:06,641 INFO L225 Difference]: With dead ends: 56648 [2021-11-20 06:47:06,641 INFO L226 Difference]: Without dead ends: 46456 [2021-11-20 06:47:06,665 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 [2021-11-20 06:47:06,666 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 517 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:06,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 909 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:47:06,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46456 states. [2021-11-20 06:47:10,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46456 to 44802. [2021-11-20 06:47:10,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44802 states, 44801 states have (on average 1.5761701747728845) internal successors, (70614), 44801 states have internal predecessors, (70614), 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) [2021-11-20 06:47:10,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44802 states to 44802 states and 70614 transitions. [2021-11-20 06:47:10,409 INFO L78 Accepts]: Start accepts. Automaton has 44802 states and 70614 transitions. Word has length 87 [2021-11-20 06:47:10,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:47:10,409 INFO L470 AbstractCegarLoop]: Abstraction has 44802 states and 70614 transitions. [2021-11-20 06:47:10,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 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) [2021-11-20 06:47:10,410 INFO L276 IsEmpty]: Start isEmpty. Operand 44802 states and 70614 transitions. [2021-11-20 06:47:10,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-20 06:47:10,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:47:10,412 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] [2021-11-20 06:47:10,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 06:47:10,413 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:47:10,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:47:10,414 INFO L85 PathProgramCache]: Analyzing trace with hash 960026915, now seen corresponding path program 1 times [2021-11-20 06:47:10,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:47:10,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792005300] [2021-11-20 06:47:10,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:10,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:47:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:47:10,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:47:10,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792005300] [2021-11-20 06:47:10,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792005300] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:47:10,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:47:10,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:47:10,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101113448] [2021-11-20 06:47:10,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:47:10,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:47:10,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:47:10,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:47:10,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:47:10,497 INFO L87 Difference]: Start difference. First operand 44802 states and 70614 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 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) [2021-11-20 06:47:14,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:47:14,411 INFO L93 Difference]: Finished difference Result 63518 states and 100702 transitions. [2021-11-20 06:47:14,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:47:14,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 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 87 [2021-11-20 06:47:14,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:47:14,516 INFO L225 Difference]: With dead ends: 63518 [2021-11-20 06:47:14,516 INFO L226 Difference]: Without dead ends: 53096 [2021-11-20 06:47:14,533 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 [2021-11-20 06:47:14,533 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 506 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:14,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 1008 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:47:14,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53096 states. [2021-11-20 06:47:18,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53096 to 51442. [2021-11-20 06:47:18,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51442 states, 51441 states have (on average 1.5791683676444859) internal successors, (81234), 51441 states have internal predecessors, (81234), 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) [2021-11-20 06:47:19,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51442 states to 51442 states and 81234 transitions. [2021-11-20 06:47:19,059 INFO L78 Accepts]: Start accepts. Automaton has 51442 states and 81234 transitions. Word has length 87 [2021-11-20 06:47:19,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:47:19,059 INFO L470 AbstractCegarLoop]: Abstraction has 51442 states and 81234 transitions. [2021-11-20 06:47:19,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 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) [2021-11-20 06:47:19,060 INFO L276 IsEmpty]: Start isEmpty. Operand 51442 states and 81234 transitions. [2021-11-20 06:47:19,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-20 06:47:19,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:47:19,063 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:47:19,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 06:47:19,063 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:47:19,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:47:19,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1600537049, now seen corresponding path program 1 times [2021-11-20 06:47:19,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:47:19,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182421872] [2021-11-20 06:47:19,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:19,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:47:19,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:47:19,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:47:19,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182421872] [2021-11-20 06:47:19,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182421872] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:47:19,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:47:19,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:47:19,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459770304] [2021-11-20 06:47:19,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:47:19,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:47:19,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:47:19,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:47:19,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:47:19,136 INFO L87 Difference]: Start difference. First operand 51442 states and 81234 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2021-11-20 06:47:25,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:47:25,145 INFO L93 Difference]: Finished difference Result 113249 states and 179766 transitions. [2021-11-20 06:47:25,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:47:25,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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 88 [2021-11-20 06:47:25,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:47:25,322 INFO L225 Difference]: With dead ends: 113249 [2021-11-20 06:47:25,322 INFO L226 Difference]: Without dead ends: 82689 [2021-11-20 06:47:25,534 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 [2021-11-20 06:47:25,543 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 103 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:25,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 372 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:47:25,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82689 states.