./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.UNBOUNDED.pals.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_c197befe-8fea-47b5-8fc8-c05cfc1f68aa/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c197befe-8fea-47b5-8fc8-c05cfc1f68aa/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_c197befe-8fea-47b5-8fc8-c05cfc1f68aa/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c197befe-8fea-47b5-8fc8-c05cfc1f68aa/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c197befe-8fea-47b5-8fc8-c05cfc1f68aa/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_c197befe-8fea-47b5-8fc8-c05cfc1f68aa/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 71881827e42af7e93d8d7789f21cf70c42c80b5b7128690239afcf02ba9daf37 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:23:06,252 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:23:06,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:23:06,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:23:06,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:23:06,323 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:23:06,325 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:23:06,327 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:23:06,330 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:23:06,331 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:23:06,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:23:06,333 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:23:06,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:23:06,335 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:23:06,337 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:23:06,338 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:23:06,339 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:23:06,340 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:23:06,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:23:06,345 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:23:06,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:23:06,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:23:06,362 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:23:06,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:23:06,369 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:23:06,374 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:23:06,375 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:23:06,376 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:23:06,378 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:23:06,379 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:23:06,380 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:23:06,381 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:23:06,383 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:23:06,384 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:23:06,386 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:23:06,387 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:23:06,387 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:23:06,388 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:23:06,388 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:23:06,389 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:23:06,389 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:23:06,390 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c197befe-8fea-47b5-8fc8-c05cfc1f68aa/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:23:06,442 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:23:06,442 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:23:06,443 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:23:06,443 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:23:06,449 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:23:06,449 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:23:06,450 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:23:06,450 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:23:06,450 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:23:06,450 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:23:06,452 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:23:06,452 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:23:06,452 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:23:06,452 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:23:06,453 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:23:06,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:23:06,453 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:23:06,453 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:23:06,454 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:23:06,454 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:23:06,454 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:23:06,454 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:23:06,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:23:06,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:23:06,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:23:06,455 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:23:06,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:23:06,456 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:23:06,456 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:23:06,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:23:06,457 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:23:06,457 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:23:06,457 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:23:06,458 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:23:06,458 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_c197befe-8fea-47b5-8fc8-c05cfc1f68aa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c197befe-8fea-47b5-8fc8-c05cfc1f68aa/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71881827e42af7e93d8d7789f21cf70c42c80b5b7128690239afcf02ba9daf37 [2021-11-20 07:23:06,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:23:06,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:23:06,737 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:23:06,738 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:23:06,739 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:23:06,741 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c197befe-8fea-47b5-8fc8-c05cfc1f68aa/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.UNBOUNDED.pals.c [2021-11-20 07:23:06,830 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c197befe-8fea-47b5-8fc8-c05cfc1f68aa/bin/uautomizer-DQz5hQGWxF/data/aed68e8b7/21f936810ece4fe99a16eb6a3e4d3e17/FLAG0f2cd3eae [2021-11-20 07:23:07,302 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:23:07,302 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c197befe-8fea-47b5-8fc8-c05cfc1f68aa/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.UNBOUNDED.pals.c [2021-11-20 07:23:07,325 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c197befe-8fea-47b5-8fc8-c05cfc1f68aa/bin/uautomizer-DQz5hQGWxF/data/aed68e8b7/21f936810ece4fe99a16eb6a3e4d3e17/FLAG0f2cd3eae [2021-11-20 07:23:07,629 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c197befe-8fea-47b5-8fc8-c05cfc1f68aa/bin/uautomizer-DQz5hQGWxF/data/aed68e8b7/21f936810ece4fe99a16eb6a3e4d3e17 [2021-11-20 07:23:07,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:23:07,633 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:23:07,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:23:07,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:23:07,639 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:23:07,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:23:07" (1/1) ... [2021-11-20 07:23:07,641 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b6c731b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:23:07, skipping insertion in model container [2021-11-20 07:23:07,641 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:23:07" (1/1) ... [2021-11-20 07:23:07,649 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:23:07,696 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:23:07,945 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_c197befe-8fea-47b5-8fc8-c05cfc1f68aa/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.UNBOUNDED.pals.c[15103,15116] [2021-11-20 07:23:07,948 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:23:07,958 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:23:08,018 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_c197befe-8fea-47b5-8fc8-c05cfc1f68aa/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.UNBOUNDED.pals.c[15103,15116] [2021-11-20 07:23:08,019 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:23:08,035 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:23:08,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:23:08 WrapperNode [2021-11-20 07:23:08,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:23:08,037 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:23:08,037 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:23:08,038 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:23:08,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:23:08" (1/1) ... [2021-11-20 07:23:08,074 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:23:08" (1/1) ... [2021-11-20 07:23:08,116 INFO L137 Inliner]: procedures = 26, calls = 17, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 390 [2021-11-20 07:23:08,116 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:23:08,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:23:08,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:23:08,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:23:08,133 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:23:08" (1/1) ... [2021-11-20 07:23:08,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:23:08" (1/1) ... [2021-11-20 07:23:08,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:23:08" (1/1) ... [2021-11-20 07:23:08,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:23:08" (1/1) ... [2021-11-20 07:23:08,158 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:23:08" (1/1) ... [2021-11-20 07:23:08,169 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:23:08" (1/1) ... [2021-11-20 07:23:08,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:23:08" (1/1) ... [2021-11-20 07:23:08,177 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:23:08,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:23:08,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:23:08,178 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:23:08,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:23:08" (1/1) ... [2021-11-20 07:23:08,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:23:08,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c197befe-8fea-47b5-8fc8-c05cfc1f68aa/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:23:08,224 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c197befe-8fea-47b5-8fc8-c05cfc1f68aa/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:23:08,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c197befe-8fea-47b5-8fc8-c05cfc1f68aa/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:23:08,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:23:08,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:23:08,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:23:08,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:23:08,355 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:23:08,356 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:23:08,945 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:23:08,955 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:23:08,955 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 07:23:08,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:23:08 BoogieIcfgContainer [2021-11-20 07:23:08,958 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:23:08,959 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:23:08,959 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:23:08,963 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:23:08,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:23:07" (1/3) ... [2021-11-20 07:23:08,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e79515e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:23:08, skipping insertion in model container [2021-11-20 07:23:08,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:23:08" (2/3) ... [2021-11-20 07:23:08,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e79515e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:23:08, skipping insertion in model container [2021-11-20 07:23:08,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:23:08" (3/3) ... [2021-11-20 07:23:08,966 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.UNBOUNDED.pals.c [2021-11-20 07:23:08,971 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:23:08,972 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:23:09,047 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:23:09,055 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 07:23:09,055 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:23:09,074 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 110 states have (on average 1.7363636363636363) internal successors, (191), 111 states have internal predecessors, (191), 0 states have call successors, (0), 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 07:23:09,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 07:23:09,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:09,084 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] [2021-11-20 07:23:09,084 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:23:09,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:09,091 INFO L85 PathProgramCache]: Analyzing trace with hash -606038097, now seen corresponding path program 1 times [2021-11-20 07:23:09,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:09,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371015151] [2021-11-20 07:23:09,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:09,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:09,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:09,292 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 07:23:09,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:09,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371015151] [2021-11-20 07:23:09,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371015151] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:09,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:09,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:23:09,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806709545] [2021-11-20 07:23:09,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:09,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 07:23:09,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:09,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 07:23:09,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:23:09,332 INFO L87 Difference]: Start difference. First operand has 112 states, 110 states have (on average 1.7363636363636363) internal successors, (191), 111 states have internal predecessors, (191), 0 states have call successors, (0), 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 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 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 07:23:09,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:09,360 INFO L93 Difference]: Finished difference Result 175 states and 293 transitions. [2021-11-20 07:23:09,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:23:09,363 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-11-20 07:23:09,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:09,373 INFO L225 Difference]: With dead ends: 175 [2021-11-20 07:23:09,373 INFO L226 Difference]: Without dead ends: 108 [2021-11-20 07:23:09,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:23:09,380 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:09,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:23:09,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-20 07:23:09,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-11-20 07:23:09,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.719626168224299) internal successors, (184), 107 states have internal predecessors, (184), 0 states have call successors, (0), 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 07:23:09,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 184 transitions. [2021-11-20 07:23:09,427 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 184 transitions. Word has length 37 [2021-11-20 07:23:09,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:09,428 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 184 transitions. [2021-11-20 07:23:09,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 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 07:23:09,429 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 184 transitions. [2021-11-20 07:23:09,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 07:23:09,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:09,431 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] [2021-11-20 07:23:09,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:23:09,432 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:23:09,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:09,433 INFO L85 PathProgramCache]: Analyzing trace with hash -331278483, now seen corresponding path program 1 times [2021-11-20 07:23:09,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:09,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045629744] [2021-11-20 07:23:09,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:09,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:09,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:09,531 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 07:23:09,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:09,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045629744] [2021-11-20 07:23:09,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045629744] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:09,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:09,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:23:09,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981089727] [2021-11-20 07:23:09,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:09,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:23:09,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:09,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:23:09,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:23:09,535 INFO L87 Difference]: Start difference. First operand 108 states and 184 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 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 07:23:09,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:09,669 INFO L93 Difference]: Finished difference Result 174 states and 286 transitions. [2021-11-20 07:23:09,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:23:09,675 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-11-20 07:23:09,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:09,676 INFO L225 Difference]: With dead ends: 174 [2021-11-20 07:23:09,677 INFO L226 Difference]: Without dead ends: 108 [2021-11-20 07:23:09,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:23:09,679 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 3 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:09,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 685 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:23:09,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-20 07:23:09,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-11-20 07:23:09,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.3457943925233644) internal successors, (144), 107 states have internal predecessors, (144), 0 states have call successors, (0), 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 07:23:09,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 144 transitions. [2021-11-20 07:23:09,698 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 144 transitions. Word has length 37 [2021-11-20 07:23:09,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:09,699 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 144 transitions. [2021-11-20 07:23:09,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 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 07:23:09,700 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 144 transitions. [2021-11-20 07:23:09,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 07:23:09,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:09,708 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:23:09,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:23:09,709 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:23:09,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:09,710 INFO L85 PathProgramCache]: Analyzing trace with hash 85749534, now seen corresponding path program 1 times [2021-11-20 07:23:09,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:09,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394830124] [2021-11-20 07:23:09,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:09,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:09,934 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 07:23:09,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:09,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394830124] [2021-11-20 07:23:09,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394830124] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:09,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:09,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:23:09,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619542282] [2021-11-20 07:23:09,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:09,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:23:09,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:09,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:23:09,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:23:09,946 INFO L87 Difference]: Start difference. First operand 108 states and 144 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:23:09,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:10,000 INFO L93 Difference]: Finished difference Result 226 states and 330 transitions. [2021-11-20 07:23:10,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:23:10,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-20 07:23:10,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:10,006 INFO L225 Difference]: With dead ends: 226 [2021-11-20 07:23:10,008 INFO L226 Difference]: Without dead ends: 164 [2021-11-20 07:23:10,009 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 07:23:10,011 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 84 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 312 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 07:23:10,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 312 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:23:10,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-20 07:23:10,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2021-11-20 07:23:10,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.4285714285714286) internal successors, (230), 161 states have internal predecessors, (230), 0 states have call successors, (0), 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 07:23:10,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 230 transitions. [2021-11-20 07:23:10,029 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 230 transitions. Word has length 76 [2021-11-20 07:23:10,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:10,030 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 230 transitions. [2021-11-20 07:23:10,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:23:10,031 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 230 transitions. [2021-11-20 07:23:10,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 07:23:10,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:10,032 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:23:10,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 07:23:10,032 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:23:10,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:10,033 INFO L85 PathProgramCache]: Analyzing trace with hash -659833196, now seen corresponding path program 1 times [2021-11-20 07:23:10,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:10,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393992568] [2021-11-20 07:23:10,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:10,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:10,176 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 07:23:10,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:10,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393992568] [2021-11-20 07:23:10,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393992568] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:10,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:10,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:23:10,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534865230] [2021-11-20 07:23:10,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:10,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:23:10,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:10,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:23:10,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:23:10,180 INFO L87 Difference]: Start difference. First operand 162 states and 230 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:23:10,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:10,206 INFO L93 Difference]: Finished difference Result 382 states and 578 transitions. [2021-11-20 07:23:10,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:23:10,206 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-20 07:23:10,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:10,209 INFO L225 Difference]: With dead ends: 382 [2021-11-20 07:23:10,209 INFO L226 Difference]: Without dead ends: 266 [2021-11-20 07:23:10,210 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 07:23:10,212 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 80 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 311 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 07:23:10,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 311 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:23:10,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-20 07:23:10,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2021-11-20 07:23:10,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.4866920152091254) internal successors, (391), 263 states have internal predecessors, (391), 0 states have call successors, (0), 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 07:23:10,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 391 transitions. [2021-11-20 07:23:10,253 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 391 transitions. Word has length 76 [2021-11-20 07:23:10,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:10,253 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 391 transitions. [2021-11-20 07:23:10,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:23:10,254 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 391 transitions. [2021-11-20 07:23:10,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 07:23:10,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:10,254 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:23:10,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 07:23:10,255 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:23:10,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:10,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1695103242, now seen corresponding path program 1 times [2021-11-20 07:23:10,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:10,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522838586] [2021-11-20 07:23:10,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:10,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:10,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:10,350 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 07:23:10,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:10,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522838586] [2021-11-20 07:23:10,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522838586] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:10,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:10,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:23:10,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454574359] [2021-11-20 07:23:10,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:10,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:23:10,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:10,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:23:10,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:23:10,353 INFO L87 Difference]: Start difference. First operand 264 states and 391 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:23:10,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:10,397 INFO L93 Difference]: Finished difference Result 676 states and 1041 transitions. [2021-11-20 07:23:10,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:23:10,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-20 07:23:10,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:10,402 INFO L225 Difference]: With dead ends: 676 [2021-11-20 07:23:10,402 INFO L226 Difference]: Without dead ends: 458 [2021-11-20 07:23:10,404 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 07:23:10,405 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 76 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 310 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 07:23:10,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 310 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:23:10,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-11-20 07:23:10,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2021-11-20 07:23:10,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.5186813186813186) internal successors, (691), 455 states have internal predecessors, (691), 0 states have call successors, (0), 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 07:23:10,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 691 transitions. [2021-11-20 07:23:10,448 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 691 transitions. Word has length 76 [2021-11-20 07:23:10,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:10,449 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 691 transitions. [2021-11-20 07:23:10,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:23:10,449 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 691 transitions. [2021-11-20 07:23:10,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 07:23:10,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:10,454 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:23:10,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 07:23:10,454 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:23:10,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:10,455 INFO L85 PathProgramCache]: Analyzing trace with hash 100818560, now seen corresponding path program 1 times [2021-11-20 07:23:10,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:10,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405074894] [2021-11-20 07:23:10,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:10,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:10,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:10,571 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 07:23:10,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:10,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405074894] [2021-11-20 07:23:10,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405074894] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:10,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:10,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:23:10,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957430807] [2021-11-20 07:23:10,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:10,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:23:10,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:10,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:23:10,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:23:10,575 INFO L87 Difference]: Start difference. First operand 456 states and 691 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:23:10,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:10,656 INFO L93 Difference]: Finished difference Result 1228 states and 1901 transitions. [2021-11-20 07:23:10,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:23:10,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-20 07:23:10,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:10,664 INFO L225 Difference]: With dead ends: 1228 [2021-11-20 07:23:10,664 INFO L226 Difference]: Without dead ends: 818 [2021-11-20 07:23:10,665 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 07:23:10,667 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 72 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 309 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 07:23:10,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 309 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:23:10,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-11-20 07:23:10,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 816. [2021-11-20 07:23:10,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 1.5300613496932516) internal successors, (1247), 815 states have internal predecessors, (1247), 0 states have call successors, (0), 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 07:23:10,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1247 transitions. [2021-11-20 07:23:10,728 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1247 transitions. Word has length 76 [2021-11-20 07:23:10,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:10,728 INFO L470 AbstractCegarLoop]: Abstraction has 816 states and 1247 transitions. [2021-11-20 07:23:10,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:23:10,729 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1247 transitions. [2021-11-20 07:23:10,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 07:23:10,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:10,730 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:23:10,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 07:23:10,730 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:23:10,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:10,731 INFO L85 PathProgramCache]: Analyzing trace with hash 438611702, now seen corresponding path program 1 times [2021-11-20 07:23:10,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:10,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303441947] [2021-11-20 07:23:10,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:10,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:10,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:10,783 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 07:23:10,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:10,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303441947] [2021-11-20 07:23:10,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303441947] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:10,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:10,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:23:10,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253959641] [2021-11-20 07:23:10,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:10,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:23:10,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:10,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:23:10,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:23:10,786 INFO L87 Difference]: Start difference. First operand 816 states and 1247 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:23:10,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:10,845 INFO L93 Difference]: Finished difference Result 2260 states and 3489 transitions. [2021-11-20 07:23:10,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:23:10,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-20 07:23:10,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:10,859 INFO L225 Difference]: With dead ends: 2260 [2021-11-20 07:23:10,859 INFO L226 Difference]: Without dead ends: 1490 [2021-11-20 07:23:10,861 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 07:23:10,863 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 68 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 308 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 07:23:10,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 308 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:23:10,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2021-11-20 07:23:10,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1488. [2021-11-20 07:23:10,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1487 states have (on average 1.527236045729657) internal successors, (2271), 1487 states have internal predecessors, (2271), 0 states have call successors, (0), 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 07:23:10,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 2271 transitions. [2021-11-20 07:23:10,943 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 2271 transitions. Word has length 76 [2021-11-20 07:23:10,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:10,945 INFO L470 AbstractCegarLoop]: Abstraction has 1488 states and 2271 transitions. [2021-11-20 07:23:10,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:23:10,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 2271 transitions. [2021-11-20 07:23:10,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 07:23:10,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:10,949 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:23:10,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 07:23:10,950 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:23:10,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:10,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1656597100, now seen corresponding path program 1 times [2021-11-20 07:23:10,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:10,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960317027] [2021-11-20 07:23:10,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:10,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:10,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:11,051 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 07:23:11,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:11,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960317027] [2021-11-20 07:23:11,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960317027] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:11,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:11,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 07:23:11,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785997470] [2021-11-20 07:23:11,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:11,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:23:11,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:11,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:23:11,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:23:11,055 INFO L87 Difference]: Start difference. First operand 1488 states and 2271 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:23:11,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:11,968 INFO L93 Difference]: Finished difference Result 18792 states and 28971 transitions. [2021-11-20 07:23:11,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:23:11,968 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-20 07:23:11,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:12,080 INFO L225 Difference]: With dead ends: 18792 [2021-11-20 07:23:12,080 INFO L226 Difference]: Without dead ends: 17350 [2021-11-20 07:23:12,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:23:12,092 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 1919 mSDsluCounter, 1813 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1919 SdHoareTripleChecker+Valid, 1953 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:12,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1919 Valid, 1953 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:23:12,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17350 states. [2021-11-20 07:23:12,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17350 to 2928. [2021-11-20 07:23:12,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2928 states, 2927 states have (on average 1.5138366928595832) internal successors, (4431), 2927 states have internal predecessors, (4431), 0 states have call successors, (0), 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 07:23:12,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 4431 transitions. [2021-11-20 07:23:12,495 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 4431 transitions. Word has length 76 [2021-11-20 07:23:12,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:12,495 INFO L470 AbstractCegarLoop]: Abstraction has 2928 states and 4431 transitions. [2021-11-20 07:23:12,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:23:12,496 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 4431 transitions. [2021-11-20 07:23:12,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-20 07:23:12,497 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:12,497 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:23:12,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 07:23:12,497 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:23:12,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:12,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1436220828, now seen corresponding path program 1 times [2021-11-20 07:23:12,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:12,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136145739] [2021-11-20 07:23:12,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:12,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:12,580 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 07:23:12,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:12,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136145739] [2021-11-20 07:23:12,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136145739] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:12,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:12,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:23:12,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203430350] [2021-11-20 07:23:12,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:12,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:23:12,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:12,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:23:12,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:23:12,583 INFO L87 Difference]: Start difference. First operand 2928 states and 4431 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:23:12,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:12,978 INFO L93 Difference]: Finished difference Result 8340 states and 12593 transitions. [2021-11-20 07:23:13,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:23:13,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-20 07:23:13,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:13,054 INFO L225 Difference]: With dead ends: 8340 [2021-11-20 07:23:13,054 INFO L226 Difference]: Without dead ends: 5458 [2021-11-20 07:23:13,058 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 07:23:13,061 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 59 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:13,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 232 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:23:13,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5458 states. [2021-11-20 07:23:13,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5458 to 5392. [2021-11-20 07:23:13,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5392 states, 5391 states have (on average 1.4808013355592655) internal successors, (7983), 5391 states have internal predecessors, (7983), 0 states have call successors, (0), 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 07:23:13,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5392 states to 5392 states and 7983 transitions. [2021-11-20 07:23:13,474 INFO L78 Accepts]: Start accepts. Automaton has 5392 states and 7983 transitions. Word has length 78 [2021-11-20 07:23:13,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:13,474 INFO L470 AbstractCegarLoop]: Abstraction has 5392 states and 7983 transitions. [2021-11-20 07:23:13,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:23:13,475 INFO L276 IsEmpty]: Start isEmpty. Operand 5392 states and 7983 transitions. [2021-11-20 07:23:13,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-20 07:23:13,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:13,476 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:23:13,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 07:23:13,477 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:23:13,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:13,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1502714340, now seen corresponding path program 1 times [2021-11-20 07:23:13,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:13,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637232134] [2021-11-20 07:23:13,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:13,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:13,771 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 07:23:13,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:13,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637232134] [2021-11-20 07:23:13,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637232134] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:13,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:13,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 07:23:13,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584606135] [2021-11-20 07:23:13,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:13,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:23:13,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:13,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:23:13,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:23:13,776 INFO L87 Difference]: Start difference. First operand 5392 states and 7983 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:23:14,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:14,358 INFO L93 Difference]: Finished difference Result 10740 states and 15921 transitions. [2021-11-20 07:23:14,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:23:14,359 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-20 07:23:14,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:14,394 INFO L225 Difference]: With dead ends: 10740 [2021-11-20 07:23:14,395 INFO L226 Difference]: Without dead ends: 5394 [2021-11-20 07:23:14,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:23:14,403 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 347 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:14,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 710 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:23:14,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5394 states. [2021-11-20 07:23:14,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5394 to 5392. [2021-11-20 07:23:14,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5392 states, 5391 states have (on average 1.4689296976442219) internal successors, (7919), 5391 states have internal predecessors, (7919), 0 states have call successors, (0), 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 07:23:14,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5392 states to 5392 states and 7919 transitions. [2021-11-20 07:23:14,805 INFO L78 Accepts]: Start accepts. Automaton has 5392 states and 7919 transitions. Word has length 78 [2021-11-20 07:23:14,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:14,809 INFO L470 AbstractCegarLoop]: Abstraction has 5392 states and 7919 transitions. [2021-11-20 07:23:14,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:23:14,809 INFO L276 IsEmpty]: Start isEmpty. Operand 5392 states and 7919 transitions. [2021-11-20 07:23:14,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-20 07:23:14,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:14,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:23:14,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 07:23:14,811 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:23:14,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:14,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1075218669, now seen corresponding path program 1 times [2021-11-20 07:23:14,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:14,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703641175] [2021-11-20 07:23:14,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:14,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:14,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:14,913 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 07:23:14,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:14,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703641175] [2021-11-20 07:23:14,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703641175] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:14,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:14,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:23:14,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207751066] [2021-11-20 07:23:14,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:14,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:23:14,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:14,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:23:14,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:23:14,916 INFO L87 Difference]: Start difference. First operand 5392 states and 7919 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:23:15,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:15,535 INFO L93 Difference]: Finished difference Result 9362 states and 13674 transitions. [2021-11-20 07:23:15,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:23:15,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-20 07:23:15,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:15,555 INFO L225 Difference]: With dead ends: 9362 [2021-11-20 07:23:15,556 INFO L226 Difference]: Without dead ends: 9360 [2021-11-20 07:23:15,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:23:15,559 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 264 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:15,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 629 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:23:15,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9360 states. [2021-11-20 07:23:15,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9360 to 5584. [2021-11-20 07:23:16,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5584 states, 5583 states have (on average 1.447071466953251) internal successors, (8079), 5583 states have internal predecessors, (8079), 0 states have call successors, (0), 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 07:23:16,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5584 states to 5584 states and 8079 transitions. [2021-11-20 07:23:16,020 INFO L78 Accepts]: Start accepts. Automaton has 5584 states and 8079 transitions. Word has length 79 [2021-11-20 07:23:16,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:16,021 INFO L470 AbstractCegarLoop]: Abstraction has 5584 states and 8079 transitions. [2021-11-20 07:23:16,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:23:16,021 INFO L276 IsEmpty]: Start isEmpty. Operand 5584 states and 8079 transitions. [2021-11-20 07:23:16,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-20 07:23:16,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:16,028 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:23:16,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 07:23:16,028 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:23:16,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:16,038 INFO L85 PathProgramCache]: Analyzing trace with hash 809566587, now seen corresponding path program 1 times [2021-11-20 07:23:16,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:16,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544436065] [2021-11-20 07:23:16,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:16,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:16,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:16,082 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 07:23:16,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:16,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544436065] [2021-11-20 07:23:16,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544436065] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:16,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:16,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:23:16,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006131749] [2021-11-20 07:23:16,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:16,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:23:16,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:16,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:23:16,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:23:16,085 INFO L87 Difference]: Start difference. First operand 5584 states and 8079 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:23:16,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:16,642 INFO L93 Difference]: Finished difference Result 11223 states and 16341 transitions. [2021-11-20 07:23:16,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:23:16,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-20 07:23:16,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:16,661 INFO L225 Difference]: With dead ends: 11223 [2021-11-20 07:23:16,661 INFO L226 Difference]: Without dead ends: 8148 [2021-11-20 07:23:16,667 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 07:23:16,668 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 85 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 317 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 07:23:16,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 317 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:23:16,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8148 states. [2021-11-20 07:23:17,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8148 to 8146. [2021-11-20 07:23:17,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8146 states, 8145 states have (on average 1.440024554941682) internal successors, (11729), 8145 states have internal predecessors, (11729), 0 states have call successors, (0), 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 07:23:17,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8146 states to 8146 states and 11729 transitions. [2021-11-20 07:23:17,385 INFO L78 Accepts]: Start accepts. Automaton has 8146 states and 11729 transitions. Word has length 80 [2021-11-20 07:23:17,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:17,385 INFO L470 AbstractCegarLoop]: Abstraction has 8146 states and 11729 transitions. [2021-11-20 07:23:17,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:23:17,386 INFO L276 IsEmpty]: Start isEmpty. Operand 8146 states and 11729 transitions. [2021-11-20 07:23:17,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-20 07:23:17,394 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:17,394 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:23:17,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 07:23:17,395 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:23:17,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:17,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1318686152, now seen corresponding path program 1 times [2021-11-20 07:23:17,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:17,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563524887] [2021-11-20 07:23:17,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:17,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:17,509 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 07:23:17,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:17,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563524887] [2021-11-20 07:23:17,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563524887] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:17,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:17,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 07:23:17,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613272830] [2021-11-20 07:23:17,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:17,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:23:17,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:17,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:23:17,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:23:17,512 INFO L87 Difference]: Start difference. First operand 8146 states and 11729 transitions. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 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 07:23:20,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:20,074 INFO L93 Difference]: Finished difference Result 58336 states and 84040 transitions. [2021-11-20 07:23:20,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:23:20,075 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 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 111 [2021-11-20 07:23:20,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:20,214 INFO L225 Difference]: With dead ends: 58336 [2021-11-20 07:23:20,214 INFO L226 Difference]: Without dead ends: 50238 [2021-11-20 07:23:20,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:23:20,239 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 1455 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1455 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:20,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1455 Valid, 978 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:23:20,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50238 states. [2021-11-20 07:23:21,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50238 to 16242. [2021-11-20 07:23:21,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16242 states, 16241 states have (on average 1.4354411674157994) internal successors, (23313), 16241 states have internal predecessors, (23313), 0 states have call successors, (0), 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 07:23:21,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16242 states to 16242 states and 23313 transitions. [2021-11-20 07:23:21,668 INFO L78 Accepts]: Start accepts. Automaton has 16242 states and 23313 transitions. Word has length 111 [2021-11-20 07:23:21,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:21,668 INFO L470 AbstractCegarLoop]: Abstraction has 16242 states and 23313 transitions. [2021-11-20 07:23:21,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 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 07:23:21,669 INFO L276 IsEmpty]: Start isEmpty. Operand 16242 states and 23313 transitions. [2021-11-20 07:23:21,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-20 07:23:21,675 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:21,676 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:23:21,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 07:23:21,676 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:23:21,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:21,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1207498328, now seen corresponding path program 1 times [2021-11-20 07:23:21,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:21,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685241561] [2021-11-20 07:23:21,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:21,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:21,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:23:21,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:21,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685241561] [2021-11-20 07:23:21,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685241561] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:21,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:21,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 07:23:21,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704056714] [2021-11-20 07:23:21,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:21,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:23:21,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:21,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:23:21,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:23:21,789 INFO L87 Difference]: Start difference. First operand 16242 states and 23313 transitions. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 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 07:23:24,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:24,435 INFO L93 Difference]: Finished difference Result 66432 states and 95624 transitions. [2021-11-20 07:23:24,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:23:24,436 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 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 111 [2021-11-20 07:23:24,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:24,583 INFO L225 Difference]: With dead ends: 66432 [2021-11-20 07:23:24,583 INFO L226 Difference]: Without dead ends: 58334 [2021-11-20 07:23:24,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:23:24,606 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 1277 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:24,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1277 Valid, 1026 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:23:24,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58334 states. [2021-11-20 07:23:26,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58334 to 28402. [2021-11-20 07:23:26,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28402 states, 28401 states have (on average 1.4298440195767754) internal successors, (40609), 28401 states have internal predecessors, (40609), 0 states have call successors, (0), 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 07:23:26,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28402 states to 28402 states and 40609 transitions. [2021-11-20 07:23:26,380 INFO L78 Accepts]: Start accepts. Automaton has 28402 states and 40609 transitions. Word has length 111 [2021-11-20 07:23:26,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:26,380 INFO L470 AbstractCegarLoop]: Abstraction has 28402 states and 40609 transitions. [2021-11-20 07:23:26,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 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 07:23:26,381 INFO L276 IsEmpty]: Start isEmpty. Operand 28402 states and 40609 transitions. [2021-11-20 07:23:26,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-20 07:23:26,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:26,391 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:23:26,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 07:23:26,391 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:23:26,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:26,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1955829128, now seen corresponding path program 1 times [2021-11-20 07:23:26,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:26,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874283998] [2021-11-20 07:23:26,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:26,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:26,708 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 07:23:26,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:26,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874283998] [2021-11-20 07:23:26,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874283998] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:26,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:26,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 07:23:26,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644091848] [2021-11-20 07:23:26,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:26,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:23:26,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:26,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:23:26,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:23:26,710 INFO L87 Difference]: Start difference. First operand 28402 states and 40609 transitions. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 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 07:23:29,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:29,780 INFO L93 Difference]: Finished difference Result 74528 states and 107208 transitions. [2021-11-20 07:23:29,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:23:29,781 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 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 111 [2021-11-20 07:23:29,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:29,942 INFO L225 Difference]: With dead ends: 74528 [2021-11-20 07:23:29,942 INFO L226 Difference]: Without dead ends: 66430 [2021-11-20 07:23:29,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:23:29,976 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 1243 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1243 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:29,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1243 Valid, 1070 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:23:30,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66430 states. [2021-11-20 07:23:32,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66430 to 36498. [2021-11-20 07:23:32,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36498 states, 36497 states have (on average 1.4300627448831411) internal successors, (52193), 36497 states have internal predecessors, (52193), 0 states have call successors, (0), 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 07:23:32,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36498 states to 36498 states and 52193 transitions. [2021-11-20 07:23:32,477 INFO L78 Accepts]: Start accepts. Automaton has 36498 states and 52193 transitions. Word has length 111 [2021-11-20 07:23:32,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:32,478 INFO L470 AbstractCegarLoop]: Abstraction has 36498 states and 52193 transitions. [2021-11-20 07:23:32,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 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 07:23:32,478 INFO L276 IsEmpty]: Start isEmpty. Operand 36498 states and 52193 transitions. [2021-11-20 07:23:32,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-20 07:23:32,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:32,488 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:23:32,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 07:23:32,488 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:23:32,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:32,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1103679128, now seen corresponding path program 1 times [2021-11-20 07:23:32,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:32,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017072649] [2021-11-20 07:23:32,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:32,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:32,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:32,588 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:23:32,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:32,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017072649] [2021-11-20 07:23:32,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017072649] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:32,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:32,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 07:23:32,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157745970] [2021-11-20 07:23:32,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:32,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:23:32,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:32,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:23:32,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:23:32,591 INFO L87 Difference]: Start difference. First operand 36498 states and 52193 transitions. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 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 07:23:36,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:36,715 INFO L93 Difference]: Finished difference Result 82624 states and 118792 transitions. [2021-11-20 07:23:36,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:23:36,716 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 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 111 [2021-11-20 07:23:36,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:36,850 INFO L225 Difference]: With dead ends: 82624 [2021-11-20 07:23:36,850 INFO L226 Difference]: Without dead ends: 74526 [2021-11-20 07:23:36,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:23:36,877 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 1311 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1311 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:36,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1311 Valid, 1112 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:23:36,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74526 states. [2021-11-20 07:23:39,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74526 to 44594. [2021-11-20 07:23:39,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44594 states, 44593 states have (on average 1.430202049649048) internal successors, (63777), 44593 states have internal predecessors, (63777), 0 states have call successors, (0), 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 07:23:39,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44594 states to 44594 states and 63777 transitions. [2021-11-20 07:23:39,652 INFO L78 Accepts]: Start accepts. Automaton has 44594 states and 63777 transitions. Word has length 111 [2021-11-20 07:23:39,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:39,652 INFO L470 AbstractCegarLoop]: Abstraction has 44594 states and 63777 transitions. [2021-11-20 07:23:39,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 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 07:23:39,653 INFO L276 IsEmpty]: Start isEmpty. Operand 44594 states and 63777 transitions. [2021-11-20 07:23:39,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-20 07:23:39,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:39,664 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:23:39,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 07:23:39,664 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:23:39,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:39,665 INFO L85 PathProgramCache]: Analyzing trace with hash -317316424, now seen corresponding path program 1 times [2021-11-20 07:23:39,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:39,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182361059] [2021-11-20 07:23:39,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:39,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:39,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:39,770 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:23:39,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:39,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182361059] [2021-11-20 07:23:39,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182361059] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:39,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:39,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 07:23:39,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278394716] [2021-11-20 07:23:39,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:39,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:23:39,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:39,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:23:39,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:23:39,773 INFO L87 Difference]: Start difference. First operand 44594 states and 63777 transitions. Second operand has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 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 07:23:44,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:44,778 INFO L93 Difference]: Finished difference Result 90720 states and 130376 transitions. [2021-11-20 07:23:44,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:23:44,779 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 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 111 [2021-11-20 07:23:44,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:44,923 INFO L225 Difference]: With dead ends: 90720 [2021-11-20 07:23:44,923 INFO L226 Difference]: Without dead ends: 82622 [2021-11-20 07:23:44,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:23:44,953 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 1429 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1429 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:44,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1429 Valid, 1025 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:23:45,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82622 states. [2021-11-20 07:23:48,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82622 to 52690. [2021-11-20 07:23:48,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52690 states, 52689 states have (on average 1.4302985442881815) internal successors, (75361), 52689 states have internal predecessors, (75361), 0 states have call successors, (0), 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 07:23:48,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52690 states to 52690 states and 75361 transitions. [2021-11-20 07:23:48,877 INFO L78 Accepts]: Start accepts. Automaton has 52690 states and 75361 transitions. Word has length 111 [2021-11-20 07:23:48,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:48,877 INFO L470 AbstractCegarLoop]: Abstraction has 52690 states and 75361 transitions. [2021-11-20 07:23:48,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 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 07:23:48,877 INFO L276 IsEmpty]: Start isEmpty. Operand 52690 states and 75361 transitions. [2021-11-20 07:23:48,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-20 07:23:48,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:48,894 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:23:48,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 07:23:48,895 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:23:48,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:48,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1591238992, now seen corresponding path program 1 times [2021-11-20 07:23:48,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:48,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688709756] [2021-11-20 07:23:48,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:48,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:48,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:48,955 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:23:48,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:48,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688709756] [2021-11-20 07:23:48,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688709756] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:48,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:48,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:23:48,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535787762] [2021-11-20 07:23:48,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:48,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:23:48,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:48,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:23:48,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:23:48,957 INFO L87 Difference]: Start difference. First operand 52690 states and 75361 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 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 07:23:51,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:51,246 INFO L93 Difference]: Finished difference Result 89336 states and 128236 transitions. [2021-11-20 07:23:51,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:23:51,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 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 113 [2021-11-20 07:23:51,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:51,292 INFO L225 Difference]: With dead ends: 89336 [2021-11-20 07:23:51,292 INFO L226 Difference]: Without dead ends: 36694 [2021-11-20 07:23:51,321 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 07:23:51,322 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 63 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:51,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 320 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:23:51,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36694 states. [2021-11-20 07:23:53,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36694 to 36692. [2021-11-20 07:23:53,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36692 states, 36691 states have (on average 1.4310048785805785) internal successors, (52505), 36691 states have internal predecessors, (52505), 0 states have call successors, (0), 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 07:23:53,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36692 states to 36692 states and 52505 transitions. [2021-11-20 07:23:53,906 INFO L78 Accepts]: Start accepts. Automaton has 36692 states and 52505 transitions. Word has length 113 [2021-11-20 07:23:53,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:53,906 INFO L470 AbstractCegarLoop]: Abstraction has 36692 states and 52505 transitions. [2021-11-20 07:23:53,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 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 07:23:53,906 INFO L276 IsEmpty]: Start isEmpty. Operand 36692 states and 52505 transitions. [2021-11-20 07:23:53,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-20 07:23:53,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:53,916 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:23:53,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 07:23:53,916 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:23:53,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:53,917 INFO L85 PathProgramCache]: Analyzing trace with hash 406305469, now seen corresponding path program 1 times [2021-11-20 07:23:53,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:53,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69892267] [2021-11-20 07:23:53,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:53,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:54,015 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:23:54,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:54,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69892267] [2021-11-20 07:23:54,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69892267] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:54,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:54,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 07:23:54,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079806459] [2021-11-20 07:23:54,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:54,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:23:54,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:54,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:23:54,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:23:54,018 INFO L87 Difference]: Start difference. First operand 36692 states and 52505 transitions. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)