./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 48aec8d1d241a0a7736380f3571da3a89472d426f8d78df6e318e9a8d52f121e --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 22:01:34,256 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 22:01:34,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 22:01:34,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 22:01:34,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 22:01:34,289 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 22:01:34,291 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 22:01:34,293 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 22:01:34,295 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 22:01:34,296 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 22:01:34,297 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 22:01:34,298 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 22:01:34,299 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 22:01:34,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 22:01:34,301 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 22:01:34,303 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 22:01:34,303 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 22:01:34,305 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 22:01:34,307 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 22:01:34,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 22:01:34,311 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 22:01:34,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 22:01:34,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 22:01:34,314 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 22:01:34,318 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 22:01:34,318 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 22:01:34,319 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 22:01:34,320 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 22:01:34,320 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 22:01:34,321 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 22:01:34,322 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 22:01:34,322 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 22:01:34,323 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 22:01:34,324 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 22:01:34,325 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 22:01:34,325 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 22:01:34,326 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 22:01:34,326 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 22:01:34,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 22:01:34,327 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 22:01:34,328 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 22:01:34,329 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 22:01:34,349 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 22:01:34,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 22:01:34,350 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 22:01:34,350 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 22:01:34,351 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 22:01:34,351 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 22:01:34,352 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 22:01:34,352 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 22:01:34,352 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 22:01:34,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 22:01:34,352 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 22:01:34,353 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 22:01:34,353 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 22:01:34,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 22:01:34,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 22:01:34,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 22:01:34,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 22:01:34,354 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 22:01:34,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 22:01:34,354 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 22:01:34,354 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 22:01:34,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 22:01:34,354 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 22:01:34,355 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 22:01:34,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:01:34,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 22:01:34,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 22:01:34,355 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 22:01:34,356 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 22:01:34,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 22:01:34,356 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 22:01:34,356 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 22:01:34,356 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 22:01:34,356 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 22:01:34,357 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_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48aec8d1d241a0a7736380f3571da3a89472d426f8d78df6e318e9a8d52f121e [2021-12-06 22:01:34,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 22:01:34,561 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 22:01:34,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 22:01:34,563 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 22:01:34,564 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 22:01:34,565 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/eca-rers2012/Problem13_label02.c [2021-12-06 22:01:34,608 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/data/e2b062a13/213aebb2efe34ad08c4a06830261312a/FLAG1421e8577 [2021-12-06 22:01:35,196 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 22:01:35,197 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/sv-benchmarks/c/eca-rers2012/Problem13_label02.c [2021-12-06 22:01:35,225 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/data/e2b062a13/213aebb2efe34ad08c4a06830261312a/FLAG1421e8577 [2021-12-06 22:01:35,658 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/data/e2b062a13/213aebb2efe34ad08c4a06830261312a [2021-12-06 22:01:35,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 22:01:35,665 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 22:01:35,667 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 22:01:35,667 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 22:01:35,671 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 22:01:35,672 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:01:35" (1/1) ... [2021-12-06 22:01:35,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47a0a11b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:01:35, skipping insertion in model container [2021-12-06 22:01:35,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:01:35" (1/1) ... [2021-12-06 22:01:35,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 22:01:35,764 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 22:01:35,988 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_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/sv-benchmarks/c/eca-rers2012/Problem13_label02.c[5671,5684] [2021-12-06 22:01:36,665 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:01:36,671 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 22:01:36,691 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_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/sv-benchmarks/c/eca-rers2012/Problem13_label02.c[5671,5684] [2021-12-06 22:01:37,158 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:01:37,177 INFO L208 MainTranslator]: Completed translation [2021-12-06 22:01:37,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:01:37 WrapperNode [2021-12-06 22:01:37,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 22:01:37,178 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 22:01:37,178 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 22:01:37,178 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 22:01:37,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:01:37" (1/1) ... [2021-12-06 22:01:37,230 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:01:37" (1/1) ... [2021-12-06 22:01:37,644 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-06 22:01:37,644 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 22:01:37,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 22:01:37,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 22:01:37,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 22:01:37,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:01:37" (1/1) ... [2021-12-06 22:01:37,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:01:37" (1/1) ... [2021-12-06 22:01:37,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:01:37" (1/1) ... [2021-12-06 22:01:37,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:01:37" (1/1) ... [2021-12-06 22:01:37,935 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:01:37" (1/1) ... [2021-12-06 22:01:37,977 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:01:37" (1/1) ... [2021-12-06 22:01:38,023 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:01:37" (1/1) ... [2021-12-06 22:01:38,082 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 22:01:38,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 22:01:38,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 22:01:38,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 22:01:38,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:01:37" (1/1) ... [2021-12-06 22:01:38,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:01:38,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:01:38,114 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 22:01:38,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 22:01:38,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 22:01:38,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 22:01:38,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 22:01:38,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 22:01:38,213 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 22:01:38,214 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 22:01:41,846 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 22:01:41,863 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 22:01:41,863 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 22:01:41,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:01:41 BoogieIcfgContainer [2021-12-06 22:01:41,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 22:01:41,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 22:01:41,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 22:01:41,871 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 22:01:41,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 10:01:35" (1/3) ... [2021-12-06 22:01:41,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@114c19c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:01:41, skipping insertion in model container [2021-12-06 22:01:41,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:01:37" (2/3) ... [2021-12-06 22:01:41,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@114c19c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:01:41, skipping insertion in model container [2021-12-06 22:01:41,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:01:41" (3/3) ... [2021-12-06 22:01:41,874 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label02.c [2021-12-06 22:01:41,879 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 22:01:41,879 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 22:01:41,924 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 22:01:41,931 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 22:01:41,931 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 22:01:41,958 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:01:41,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 22:01:41,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:01:41,963 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] [2021-12-06 22:01:41,964 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:01:41,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:01:41,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1453294289, now seen corresponding path program 1 times [2021-12-06 22:01:41,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:01:41,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500248826] [2021-12-06 22:01:41,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:01:41,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:01:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:01:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:01:42,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:01:42,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500248826] [2021-12-06 22:01:42,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500248826] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:01:42,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:01:42,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:01:42,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185251179] [2021-12-06 22:01:42,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:01:42,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:01:42,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:01:42,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:01:42,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:01:42,243 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:01:47,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:01:47,210 INFO L93 Difference]: Finished difference Result 3829 states and 7206 transitions. [2021-12-06 22:01:47,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:01:47,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-12-06 22:01:47,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:01:47,236 INFO L225 Difference]: With dead ends: 3829 [2021-12-06 22:01:47,236 INFO L226 Difference]: Without dead ends: 2664 [2021-12-06 22:01:47,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:01:47,244 INFO L933 BasicCegarLoop]: 761 mSDtfsCounter, 2712 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 4246 mSolverCounterSat, 1610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2712 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 5856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1610 IncrementalHoareTripleChecker+Valid, 4246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-06 22:01:47,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2712 Valid, 1067 Invalid, 5856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1610 Valid, 4246 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-06 22:01:47,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-12-06 22:01:47,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2663. [2021-12-06 22:01:47,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2662 states have (on average 1.460931630353118) internal successors, (3889), 2662 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:01:47,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 3889 transitions. [2021-12-06 22:01:47,346 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 3889 transitions. Word has length 39 [2021-12-06 22:01:47,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:01:47,347 INFO L470 AbstractCegarLoop]: Abstraction has 2663 states and 3889 transitions. [2021-12-06 22:01:47,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:01:47,347 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 3889 transitions. [2021-12-06 22:01:47,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-06 22:01:47,352 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:01:47,353 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:01:47,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 22:01:47,353 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:01:47,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:01:47,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1912821561, now seen corresponding path program 1 times [2021-12-06 22:01:47,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:01:47,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36732095] [2021-12-06 22:01:47,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:01:47,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:01:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:01:47,504 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:01:47,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:01:47,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36732095] [2021-12-06 22:01:47,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36732095] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:01:47,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:01:47,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:01:47,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456671247] [2021-12-06 22:01:47,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:01:47,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:01:47,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:01:47,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:01:47,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:01:47,507 INFO L87 Difference]: Start difference. First operand 2663 states and 3889 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:01:53,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:01:53,090 INFO L93 Difference]: Finished difference Result 7864 states and 12669 transitions. [2021-12-06 22:01:53,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:01:53,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 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 164 [2021-12-06 22:01:53,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:01:53,116 INFO L225 Difference]: With dead ends: 7864 [2021-12-06 22:01:53,116 INFO L226 Difference]: Without dead ends: 5990 [2021-12-06 22:01:53,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:01:53,120 INFO L933 BasicCegarLoop]: 894 mSDtfsCounter, 1640 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 6333 mSolverCounterSat, 831 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1640 SdHoareTripleChecker+Valid, 1191 SdHoareTripleChecker+Invalid, 7164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 831 IncrementalHoareTripleChecker+Valid, 6333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:01:53,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1640 Valid, 1191 Invalid, 7164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [831 Valid, 6333 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-12-06 22:01:53,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5990 states. [2021-12-06 22:01:53,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5990 to 5859. [2021-12-06 22:01:53,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5859 states, 5858 states have (on average 1.4452031410037556) internal successors, (8466), 5858 states have internal predecessors, (8466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:01:53,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5859 states to 5859 states and 8466 transitions. [2021-12-06 22:01:53,233 INFO L78 Accepts]: Start accepts. Automaton has 5859 states and 8466 transitions. Word has length 164 [2021-12-06 22:01:53,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:01:53,234 INFO L470 AbstractCegarLoop]: Abstraction has 5859 states and 8466 transitions. [2021-12-06 22:01:53,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:01:53,234 INFO L276 IsEmpty]: Start isEmpty. Operand 5859 states and 8466 transitions. [2021-12-06 22:01:53,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-12-06 22:01:53,239 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:01:53,239 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:01:53,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 22:01:53,239 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:01:53,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:01:53,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1291731195, now seen corresponding path program 1 times [2021-12-06 22:01:53,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:01:53,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346427814] [2021-12-06 22:01:53,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:01:53,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:01:53,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:01:53,371 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-06 22:01:53,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:01:53,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346427814] [2021-12-06 22:01:53,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346427814] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:01:53,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:01:53,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 22:01:53,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710558171] [2021-12-06 22:01:53,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:01:53,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:01:53,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:01:53,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:01:53,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:01:53,373 INFO L87 Difference]: Start difference. First operand 5859 states and 8466 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:01:56,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:01:56,303 INFO L93 Difference]: Finished difference Result 15685 states and 23389 transitions. [2021-12-06 22:01:56,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:01:56,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 0 states have call successors, (0), 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 206 [2021-12-06 22:01:56,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:01:56,345 INFO L225 Difference]: With dead ends: 15685 [2021-12-06 22:01:56,345 INFO L226 Difference]: Without dead ends: 10615 [2021-12-06 22:01:56,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:01:56,352 INFO L933 BasicCegarLoop]: 784 mSDtfsCounter, 918 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2553 mSolverCounterSat, 757 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 3310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 757 IncrementalHoareTripleChecker+Valid, 2553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 22:01:56,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 916 Invalid, 3310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [757 Valid, 2553 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 22:01:56,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10615 states. [2021-12-06 22:01:56,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10615 to 10608. [2021-12-06 22:01:56,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10608 states, 10607 states have (on average 1.3551428302064674) internal successors, (14374), 10607 states have internal predecessors, (14374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:01:56,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10608 states to 10608 states and 14374 transitions. [2021-12-06 22:01:56,507 INFO L78 Accepts]: Start accepts. Automaton has 10608 states and 14374 transitions. Word has length 206 [2021-12-06 22:01:56,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:01:56,507 INFO L470 AbstractCegarLoop]: Abstraction has 10608 states and 14374 transitions. [2021-12-06 22:01:56,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:01:56,507 INFO L276 IsEmpty]: Start isEmpty. Operand 10608 states and 14374 transitions. [2021-12-06 22:01:56,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-12-06 22:01:56,510 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:01:56,510 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:01:56,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 22:01:56,510 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:01:56,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:01:56,511 INFO L85 PathProgramCache]: Analyzing trace with hash -333607138, now seen corresponding path program 1 times [2021-12-06 22:01:56,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:01:56,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021498094] [2021-12-06 22:01:56,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:01:56,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:01:56,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:01:56,635 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-06 22:01:56,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:01:56,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021498094] [2021-12-06 22:01:56,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021498094] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:01:56,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:01:56,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 22:01:56,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257545102] [2021-12-06 22:01:56,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:01:56,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:01:56,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:01:56,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:01:56,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:01:56,638 INFO L87 Difference]: Start difference. First operand 10608 states and 14374 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:01:59,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:01:59,591 INFO L93 Difference]: Finished difference Result 28349 states and 39239 transitions. [2021-12-06 22:01:59,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:01:59,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 0 states have call successors, (0), 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 220 [2021-12-06 22:01:59,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:01:59,638 INFO L225 Difference]: With dead ends: 28349 [2021-12-06 22:01:59,638 INFO L226 Difference]: Without dead ends: 18530 [2021-12-06 22:01:59,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:01:59,648 INFO L933 BasicCegarLoop]: 449 mSDtfsCounter, 907 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 2871 mSolverCounterSat, 545 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 3416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 545 IncrementalHoareTripleChecker+Valid, 2871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 22:01:59,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [907 Valid, 614 Invalid, 3416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [545 Valid, 2871 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 22:01:59,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18530 states. [2021-12-06 22:01:59,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18530 to 18523. [2021-12-06 22:01:59,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18523 states, 18522 states have (on average 1.3250188964474678) internal successors, (24542), 18522 states have internal predecessors, (24542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:01:59,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18523 states to 18523 states and 24542 transitions. [2021-12-06 22:01:59,894 INFO L78 Accepts]: Start accepts. Automaton has 18523 states and 24542 transitions. Word has length 220 [2021-12-06 22:01:59,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:01:59,894 INFO L470 AbstractCegarLoop]: Abstraction has 18523 states and 24542 transitions. [2021-12-06 22:01:59,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:01:59,895 INFO L276 IsEmpty]: Start isEmpty. Operand 18523 states and 24542 transitions. [2021-12-06 22:01:59,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-12-06 22:01:59,898 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:01:59,898 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 22:01:59,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 22:01:59,899 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:01:59,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:01:59,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1947524445, now seen corresponding path program 1 times [2021-12-06 22:01:59,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:01:59,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228675378] [2021-12-06 22:01:59,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:01:59,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:01:59,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:02:00,004 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-06 22:02:00,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:02:00,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228675378] [2021-12-06 22:02:00,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228675378] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:02:00,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:02:00,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 22:02:00,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174711141] [2021-12-06 22:02:00,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:02:00,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:02:00,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:02:00,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:02:00,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:02:00,006 INFO L87 Difference]: Start difference. First operand 18523 states and 24542 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:02,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:02:02,647 INFO L93 Difference]: Finished difference Result 51208 states and 68744 transitions. [2021-12-06 22:02:02,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:02:02,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 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 257 [2021-12-06 22:02:02,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:02:02,697 INFO L225 Difference]: With dead ends: 51208 [2021-12-06 22:02:02,697 INFO L226 Difference]: Without dead ends: 33474 [2021-12-06 22:02:02,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:02:02,713 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 860 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 870 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 3178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 870 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:02:02,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [860 Valid, 986 Invalid, 3178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [870 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 22:02:02,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33474 states. [2021-12-06 22:02:03,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33474 to 31109. [2021-12-06 22:02:03,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31109 states, 31108 states have (on average 1.2544361579015044) internal successors, (39023), 31108 states have internal predecessors, (39023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:03,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31109 states to 31109 states and 39023 transitions. [2021-12-06 22:02:03,086 INFO L78 Accepts]: Start accepts. Automaton has 31109 states and 39023 transitions. Word has length 257 [2021-12-06 22:02:03,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:02:03,087 INFO L470 AbstractCegarLoop]: Abstraction has 31109 states and 39023 transitions. [2021-12-06 22:02:03,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:03,087 INFO L276 IsEmpty]: Start isEmpty. Operand 31109 states and 39023 transitions. [2021-12-06 22:02:03,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-12-06 22:02:03,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:02:03,093 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:02:03,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 22:02:03,094 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:02:03,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:02:03,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1064755178, now seen corresponding path program 1 times [2021-12-06 22:02:03,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:02:03,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384548101] [2021-12-06 22:02:03,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:02:03,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:02:03,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:02:03,176 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 286 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-06 22:02:03,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:02:03,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384548101] [2021-12-06 22:02:03,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384548101] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:02:03,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:02:03,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:02:03,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133570519] [2021-12-06 22:02:03,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:02:03,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:02:03,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:02:03,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:02:03,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:02:03,179 INFO L87 Difference]: Start difference. First operand 31109 states and 39023 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:06,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:02:06,135 INFO L93 Difference]: Finished difference Result 87412 states and 110601 transitions. [2021-12-06 22:02:06,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:02:06,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 279 [2021-12-06 22:02:06,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:02:06,208 INFO L225 Difference]: With dead ends: 87412 [2021-12-06 22:02:06,208 INFO L226 Difference]: Without dead ends: 57092 [2021-12-06 22:02:06,230 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 [2021-12-06 22:02:06,231 INFO L933 BasicCegarLoop]: 791 mSDtfsCounter, 889 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 2377 mSolverCounterSat, 920 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 3297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 920 IncrementalHoareTripleChecker+Valid, 2377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:02:06,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [889 Valid, 907 Invalid, 3297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [920 Valid, 2377 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 22:02:06,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57092 states. [2021-12-06 22:02:06,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57092 to 57082. [2021-12-06 22:02:06,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57082 states, 57081 states have (on average 1.1981920428864246) internal successors, (68394), 57081 states have internal predecessors, (68394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:06,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57082 states to 57082 states and 68394 transitions. [2021-12-06 22:02:06,796 INFO L78 Accepts]: Start accepts. Automaton has 57082 states and 68394 transitions. Word has length 279 [2021-12-06 22:02:06,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:02:06,797 INFO L470 AbstractCegarLoop]: Abstraction has 57082 states and 68394 transitions. [2021-12-06 22:02:06,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:06,797 INFO L276 IsEmpty]: Start isEmpty. Operand 57082 states and 68394 transitions. [2021-12-06 22:02:06,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2021-12-06 22:02:06,801 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:02:06,802 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:02:06,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 22:02:06,802 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:02:06,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:02:06,802 INFO L85 PathProgramCache]: Analyzing trace with hash -136295388, now seen corresponding path program 1 times [2021-12-06 22:02:06,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:02:06,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926943071] [2021-12-06 22:02:06,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:02:06,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:02:06,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:02:06,948 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 309 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-06 22:02:06,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:02:06,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926943071] [2021-12-06 22:02:06,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926943071] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:02:06,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:02:06,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:02:06,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329993793] [2021-12-06 22:02:06,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:02:06,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:02:06,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:02:06,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:02:06,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:02:06,950 INFO L87 Difference]: Start difference. First operand 57082 states and 68394 transitions. Second operand has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:13,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:02:13,385 INFO L93 Difference]: Finished difference Result 154524 states and 187111 transitions. [2021-12-06 22:02:13,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:02:13,386 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 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 307 [2021-12-06 22:02:13,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:02:13,483 INFO L225 Difference]: With dead ends: 154524 [2021-12-06 22:02:13,483 INFO L226 Difference]: Without dead ends: 98231 [2021-12-06 22:02:13,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:02:13,514 INFO L933 BasicCegarLoop]: 501 mSDtfsCounter, 1735 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 6696 mSolverCounterSat, 1118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1735 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 7814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1118 IncrementalHoareTripleChecker+Valid, 6696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:02:13,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1735 Valid, 743 Invalid, 7814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1118 Valid, 6696 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2021-12-06 22:02:13,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98231 states. [2021-12-06 22:02:14,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98231 to 98101. [2021-12-06 22:02:14,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98101 states, 98100 states have (on average 1.1910601427115188) internal successors, (116843), 98100 states have internal predecessors, (116843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:14,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98101 states to 98101 states and 116843 transitions. [2021-12-06 22:02:14,526 INFO L78 Accepts]: Start accepts. Automaton has 98101 states and 116843 transitions. Word has length 307 [2021-12-06 22:02:14,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:02:14,526 INFO L470 AbstractCegarLoop]: Abstraction has 98101 states and 116843 transitions. [2021-12-06 22:02:14,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:14,527 INFO L276 IsEmpty]: Start isEmpty. Operand 98101 states and 116843 transitions. [2021-12-06 22:02:14,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-12-06 22:02:14,530 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:02:14,530 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:02:14,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 22:02:14,530 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:02:14,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:02:14,531 INFO L85 PathProgramCache]: Analyzing trace with hash 2103186526, now seen corresponding path program 1 times [2021-12-06 22:02:14,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:02:14,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067881454] [2021-12-06 22:02:14,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:02:14,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:02:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:02:14,620 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 214 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-06 22:02:14,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:02:14,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067881454] [2021-12-06 22:02:14,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067881454] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:02:14,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:02:14,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 22:02:14,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852084644] [2021-12-06 22:02:14,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:02:14,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:02:14,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:02:14,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:02:14,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:02:14,622 INFO L87 Difference]: Start difference. First operand 98101 states and 116843 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:17,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:02:17,860 INFO L93 Difference]: Finished difference Result 182032 states and 218402 transitions. [2021-12-06 22:02:17,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:02:17,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 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 322 [2021-12-06 22:02:17,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:02:17,956 INFO L225 Difference]: With dead ends: 182032 [2021-12-06 22:02:17,956 INFO L226 Difference]: Without dead ends: 98111 [2021-12-06 22:02:17,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:02:17,977 INFO L933 BasicCegarLoop]: 1020 mSDtfsCounter, 728 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 2705 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 2709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 22:02:17,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 1201 Invalid, 2709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2705 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 22:02:18,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98111 states. [2021-12-06 22:02:18,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98111 to 98101. [2021-12-06 22:02:18,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98101 states, 98100 states have (on average 1.1901936799184505) internal successors, (116758), 98100 states have internal predecessors, (116758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:18,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98101 states to 98101 states and 116758 transitions. [2021-12-06 22:02:18,963 INFO L78 Accepts]: Start accepts. Automaton has 98101 states and 116758 transitions. Word has length 322 [2021-12-06 22:02:18,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:02:18,963 INFO L470 AbstractCegarLoop]: Abstraction has 98101 states and 116758 transitions. [2021-12-06 22:02:18,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:18,963 INFO L276 IsEmpty]: Start isEmpty. Operand 98101 states and 116758 transitions. [2021-12-06 22:02:18,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2021-12-06 22:02:18,968 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:02:18,969 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:02:18,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 22:02:18,969 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:02:18,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:02:18,970 INFO L85 PathProgramCache]: Analyzing trace with hash 821010150, now seen corresponding path program 1 times [2021-12-06 22:02:18,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:02:18,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32102368] [2021-12-06 22:02:18,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:02:18,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:02:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:02:19,180 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 217 proven. 110 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-06 22:02:19,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:02:19,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32102368] [2021-12-06 22:02:19,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32102368] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:02:19,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142811478] [2021-12-06 22:02:19,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:02:19,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:02:19,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:02:19,181 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:02:19,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 22:02:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:02:19,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 22:02:19,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:02:19,639 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-06 22:02:19,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:02:19,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142811478] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:02:19,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:02:19,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-06 22:02:19,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584849473] [2021-12-06 22:02:19,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:02:19,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:02:19,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:02:19,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:02:19,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:02:19,640 INFO L87 Difference]: Start difference. First operand 98101 states and 116758 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:22,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:02:22,413 INFO L93 Difference]: Finished difference Result 194624 states and 231569 transitions. [2021-12-06 22:02:22,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:02:22,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 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 351 [2021-12-06 22:02:22,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:02:22,502 INFO L225 Difference]: With dead ends: 194624 [2021-12-06 22:02:22,503 INFO L226 Difference]: Without dead ends: 97312 [2021-12-06 22:02:22,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:02:22,523 INFO L933 BasicCegarLoop]: 1366 mSDtfsCounter, 1138 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2467 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 1448 SdHoareTripleChecker+Invalid, 2918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 2467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:02:22,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1138 Valid, 1448 Invalid, 2918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 2467 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-06 22:02:22,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97312 states. [2021-12-06 22:02:23,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97312 to 97311. [2021-12-06 22:02:23,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97311 states, 97310 states have (on average 1.1398931250642277) internal successors, (110923), 97310 states have internal predecessors, (110923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:23,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97311 states to 97311 states and 110923 transitions. [2021-12-06 22:02:23,497 INFO L78 Accepts]: Start accepts. Automaton has 97311 states and 110923 transitions. Word has length 351 [2021-12-06 22:02:23,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:02:23,498 INFO L470 AbstractCegarLoop]: Abstraction has 97311 states and 110923 transitions. [2021-12-06 22:02:23,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:23,498 INFO L276 IsEmpty]: Start isEmpty. Operand 97311 states and 110923 transitions. [2021-12-06 22:02:23,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2021-12-06 22:02:23,503 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:02:23,503 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:02:23,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 22:02:23,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:02:23,705 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:02:23,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:02:23,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1611430083, now seen corresponding path program 1 times [2021-12-06 22:02:23,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:02:23,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692059566] [2021-12-06 22:02:23,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:02:23,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:02:23,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:02:23,831 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2021-12-06 22:02:23,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:02:23,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692059566] [2021-12-06 22:02:23,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692059566] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:02:23,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:02:23,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:02:23,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655720141] [2021-12-06 22:02:23,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:02:23,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:02:23,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:02:23,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:02:23,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:02:23,833 INFO L87 Difference]: Start difference. First operand 97311 states and 110923 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:27,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:02:27,018 INFO L93 Difference]: Finished difference Result 226913 states and 257590 transitions. [2021-12-06 22:02:27,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:02:27,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 368 [2021-12-06 22:02:27,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:02:27,165 INFO L225 Difference]: With dead ends: 226913 [2021-12-06 22:02:27,165 INFO L226 Difference]: Without dead ends: 130391 [2021-12-06 22:02:27,202 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 [2021-12-06 22:02:27,203 INFO L933 BasicCegarLoop]: 1299 mSDtfsCounter, 1069 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 2472 mSolverCounterSat, 718 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1069 SdHoareTripleChecker+Valid, 1350 SdHoareTripleChecker+Invalid, 3190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 718 IncrementalHoareTripleChecker+Valid, 2472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:02:27,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1069 Valid, 1350 Invalid, 3190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [718 Valid, 2472 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 22:02:27,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130391 states. [2021-12-06 22:02:28,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130391 to 123277. [2021-12-06 22:02:28,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123277 states, 123276 states have (on average 1.120493851195691) internal successors, (138130), 123276 states have internal predecessors, (138130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:28,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123277 states to 123277 states and 138130 transitions. [2021-12-06 22:02:28,587 INFO L78 Accepts]: Start accepts. Automaton has 123277 states and 138130 transitions. Word has length 368 [2021-12-06 22:02:28,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:02:28,588 INFO L470 AbstractCegarLoop]: Abstraction has 123277 states and 138130 transitions. [2021-12-06 22:02:28,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:28,588 INFO L276 IsEmpty]: Start isEmpty. Operand 123277 states and 138130 transitions. [2021-12-06 22:02:28,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2021-12-06 22:02:28,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:02:28,599 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:02:28,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 22:02:28,599 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:02:28,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:02:28,600 INFO L85 PathProgramCache]: Analyzing trace with hash -173582310, now seen corresponding path program 1 times [2021-12-06 22:02:28,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:02:28,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394372311] [2021-12-06 22:02:28,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:02:28,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:02:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:02:28,722 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 446 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-06 22:02:28,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:02:28,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394372311] [2021-12-06 22:02:28,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394372311] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:02:28,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:02:28,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:02:28,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302810171] [2021-12-06 22:02:28,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:02:28,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:02:28,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:02:28,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:02:28,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:02:28,724 INFO L87 Difference]: Start difference. First operand 123277 states and 138130 transitions. Second operand has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:32,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:02:32,134 INFO L93 Difference]: Finished difference Result 274901 states and 310706 transitions. [2021-12-06 22:02:32,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:02:32,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 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 470 [2021-12-06 22:02:32,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:02:32,297 INFO L225 Difference]: With dead ends: 274901 [2021-12-06 22:02:32,298 INFO L226 Difference]: Without dead ends: 152413 [2021-12-06 22:02:32,342 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 [2021-12-06 22:02:32,343 INFO L933 BasicCegarLoop]: 1784 mSDtfsCounter, 739 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 2552 mSolverCounterSat, 619 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 1938 SdHoareTripleChecker+Invalid, 3171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 619 IncrementalHoareTripleChecker+Valid, 2552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 22:02:32,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 1938 Invalid, 3171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [619 Valid, 2552 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 22:02:32,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152413 states. [2021-12-06 22:02:33,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152413 to 152394. [2021-12-06 22:02:33,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152394 states, 152393 states have (on average 1.1043420629556475) internal successors, (168294), 152393 states have internal predecessors, (168294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:33,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152394 states to 152394 states and 168294 transitions. [2021-12-06 22:02:33,940 INFO L78 Accepts]: Start accepts. Automaton has 152394 states and 168294 transitions. Word has length 470 [2021-12-06 22:02:33,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:02:33,941 INFO L470 AbstractCegarLoop]: Abstraction has 152394 states and 168294 transitions. [2021-12-06 22:02:33,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:33,941 INFO L276 IsEmpty]: Start isEmpty. Operand 152394 states and 168294 transitions. [2021-12-06 22:02:33,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2021-12-06 22:02:33,953 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:02:33,953 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:02:33,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 22:02:33,954 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:02:33,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:02:33,954 INFO L85 PathProgramCache]: Analyzing trace with hash 826766630, now seen corresponding path program 1 times [2021-12-06 22:02:33,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:02:33,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827040689] [2021-12-06 22:02:33,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:02:33,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:02:34,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:02:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 508 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2021-12-06 22:02:34,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:02:34,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827040689] [2021-12-06 22:02:34,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827040689] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:02:34,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:02:34,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:02:34,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298786915] [2021-12-06 22:02:34,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:02:34,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:02:34,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:02:34,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:02:34,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:02:34,069 INFO L87 Difference]: Start difference. First operand 152394 states and 168294 transitions. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:37,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:02:37,685 INFO L93 Difference]: Finished difference Result 333127 states and 370830 transitions. [2021-12-06 22:02:37,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:02:37,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 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 479 [2021-12-06 22:02:37,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:02:37,868 INFO L225 Difference]: With dead ends: 333127 [2021-12-06 22:02:37,868 INFO L226 Difference]: Without dead ends: 181522 [2021-12-06 22:02:37,916 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 [2021-12-06 22:02:37,917 INFO L933 BasicCegarLoop]: 700 mSDtfsCounter, 924 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2386 mSolverCounterSat, 938 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 3324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 938 IncrementalHoareTripleChecker+Valid, 2386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:02:37,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 782 Invalid, 3324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [938 Valid, 2386 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-06 22:02:38,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181522 states. [2021-12-06 22:02:39,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181522 to 181501. [2021-12-06 22:02:39,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181501 states, 181500 states have (on average 1.106793388429752) internal successors, (200883), 181500 states have internal predecessors, (200883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:39,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181501 states to 181501 states and 200883 transitions. [2021-12-06 22:02:39,966 INFO L78 Accepts]: Start accepts. Automaton has 181501 states and 200883 transitions. Word has length 479 [2021-12-06 22:02:39,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:02:39,967 INFO L470 AbstractCegarLoop]: Abstraction has 181501 states and 200883 transitions. [2021-12-06 22:02:39,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:39,967 INFO L276 IsEmpty]: Start isEmpty. Operand 181501 states and 200883 transitions. [2021-12-06 22:02:39,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2021-12-06 22:02:39,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:02:39,980 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:02:39,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 22:02:39,980 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:02:39,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:02:39,980 INFO L85 PathProgramCache]: Analyzing trace with hash -14888204, now seen corresponding path program 1 times [2021-12-06 22:02:39,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:02:39,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602153121] [2021-12-06 22:02:39,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:02:39,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:02:40,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:02:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 374 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-06 22:02:40,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:02:40,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602153121] [2021-12-06 22:02:40,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602153121] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:02:40,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:02:40,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:02:40,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142775778] [2021-12-06 22:02:40,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:02:40,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:02:40,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:02:40,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:02:40,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:02:40,123 INFO L87 Difference]: Start difference. First operand 181501 states and 200883 transitions. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:43,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:02:43,447 INFO L93 Difference]: Finished difference Result 352727 states and 392352 transitions. [2021-12-06 22:02:43,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:02:43,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 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 496 [2021-12-06 22:02:43,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:02:43,653 INFO L225 Difference]: With dead ends: 352727 [2021-12-06 22:02:43,653 INFO L226 Difference]: Without dead ends: 192485 [2021-12-06 22:02:43,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:02:43,711 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 1186 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 2264 mSolverCounterSat, 834 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1186 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 3098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 834 IncrementalHoareTripleChecker+Valid, 2264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:02:43,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1186 Valid, 386 Invalid, 3098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [834 Valid, 2264 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 22:02:43,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192485 states. [2021-12-06 22:02:45,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192485 to 192485. [2021-12-06 22:02:45,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192485 states, 192484 states have (on average 1.0990783649550093) internal successors, (211555), 192484 states have internal predecessors, (211555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:45,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192485 states to 192485 states and 211555 transitions. [2021-12-06 22:02:45,797 INFO L78 Accepts]: Start accepts. Automaton has 192485 states and 211555 transitions. Word has length 496 [2021-12-06 22:02:45,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:02:45,798 INFO L470 AbstractCegarLoop]: Abstraction has 192485 states and 211555 transitions. [2021-12-06 22:02:45,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:45,798 INFO L276 IsEmpty]: Start isEmpty. Operand 192485 states and 211555 transitions. [2021-12-06 22:02:45,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2021-12-06 22:02:45,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:02:45,822 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:02:45,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 22:02:45,822 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:02:45,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:02:45,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1589919666, now seen corresponding path program 1 times [2021-12-06 22:02:45,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:02:45,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456577819] [2021-12-06 22:02:45,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:02:45,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:02:45,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:02:46,226 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 316 proven. 110 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-06 22:02:46,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:02:46,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456577819] [2021-12-06 22:02:46,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456577819] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:02:46,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995074477] [2021-12-06 22:02:46,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:02:46,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:02:46,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:02:46,228 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:02:46,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 22:02:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:02:46,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 22:02:46,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:02:47,467 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 302 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-06 22:02:47,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:02:47,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995074477] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:02:47,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:02:47,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-06 22:02:47,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278645053] [2021-12-06 22:02:47,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:02:47,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:02:47,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:02:47,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:02:47,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:02:47,468 INFO L87 Difference]: Start difference. First operand 192485 states and 211555 transitions. Second operand has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 2 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:50,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:02:50,747 INFO L93 Difference]: Finished difference Result 370809 states and 408579 transitions. [2021-12-06 22:02:50,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:02:50,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 2 states have internal predecessors, (382), 0 states have call successors, (0), 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 541 [2021-12-06 22:02:50,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:02:50,978 INFO L225 Difference]: With dead ends: 370809 [2021-12-06 22:02:50,978 INFO L226 Difference]: Without dead ends: 199583 [2021-12-06 22:02:51,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:02:51,036 INFO L933 BasicCegarLoop]: 1004 mSDtfsCounter, 547 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2439 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 2591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 2439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:02:51,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 1133 Invalid, 2591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2439 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 22:02:51,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199583 states. [2021-12-06 22:02:52,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199583 to 199572. [2021-12-06 22:02:52,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199572 states, 199571 states have (on average 1.0951340625642003) internal successors, (218557), 199571 states have internal predecessors, (218557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:53,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199572 states to 199572 states and 218557 transitions. [2021-12-06 22:02:53,305 INFO L78 Accepts]: Start accepts. Automaton has 199572 states and 218557 transitions. Word has length 541 [2021-12-06 22:02:53,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:02:53,305 INFO L470 AbstractCegarLoop]: Abstraction has 199572 states and 218557 transitions. [2021-12-06 22:02:53,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 2 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:53,306 INFO L276 IsEmpty]: Start isEmpty. Operand 199572 states and 218557 transitions. [2021-12-06 22:02:53,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 561 [2021-12-06 22:02:53,323 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:02:53,323 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:02:53,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 22:02:53,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 22:02:53,526 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:02:53,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:02:53,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1371222807, now seen corresponding path program 1 times [2021-12-06 22:02:53,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:02:53,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340354137] [2021-12-06 22:02:53,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:02:53,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:02:53,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:02:53,696 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 757 trivial. 0 not checked. [2021-12-06 22:02:53,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:02:53,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340354137] [2021-12-06 22:02:53,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340354137] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:02:53,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:02:53,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:02:53,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370525940] [2021-12-06 22:02:53,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:02:53,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:02:53,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:02:53,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:02:53,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:02:53,698 INFO L87 Difference]: Start difference. First operand 199572 states and 218557 transitions. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:02:57,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:02:57,978 INFO L93 Difference]: Finished difference Result 433797 states and 477050 transitions. [2021-12-06 22:02:57,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:02:57,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 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 560 [2021-12-06 22:02:57,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:02:58,294 INFO L225 Difference]: With dead ends: 433797 [2021-12-06 22:02:58,295 INFO L226 Difference]: Without dead ends: 255484 [2021-12-06 22:02:58,458 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 [2021-12-06 22:02:58,459 INFO L933 BasicCegarLoop]: 540 mSDtfsCounter, 945 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 2847 mSolverCounterSat, 516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 3363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 516 IncrementalHoareTripleChecker+Valid, 2847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:02:58,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [945 Valid, 679 Invalid, 3363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [516 Valid, 2847 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-06 22:02:58,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255484 states. [2021-12-06 22:03:00,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255484 to 221617. [2021-12-06 22:03:00,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221617 states, 221616 states have (on average 1.0895603205544726) internal successors, (241464), 221616 states have internal predecessors, (241464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:03:00,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221617 states to 221617 states and 241464 transitions. [2021-12-06 22:03:00,969 INFO L78 Accepts]: Start accepts. Automaton has 221617 states and 241464 transitions. Word has length 560 [2021-12-06 22:03:00,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:03:00,969 INFO L470 AbstractCegarLoop]: Abstraction has 221617 states and 241464 transitions. [2021-12-06 22:03:00,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:03:00,970 INFO L276 IsEmpty]: Start isEmpty. Operand 221617 states and 241464 transitions. [2021-12-06 22:03:00,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2021-12-06 22:03:00,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:03:00,991 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:03:00,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 22:03:00,991 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:03:00,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:03:00,992 INFO L85 PathProgramCache]: Analyzing trace with hash -2037060357, now seen corresponding path program 1 times [2021-12-06 22:03:00,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:03:00,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975049467] [2021-12-06 22:03:00,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:03:00,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:03:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:03:01,286 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 565 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-12-06 22:03:01,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:03:01,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975049467] [2021-12-06 22:03:01,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975049467] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:03:01,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:03:01,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:03:01,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803034741] [2021-12-06 22:03:01,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:03:01,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:03:01,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:03:01,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:03:01,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:03:01,288 INFO L87 Difference]: Start difference. First operand 221617 states and 241464 transitions. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:03:05,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:03:05,030 INFO L93 Difference]: Finished difference Result 449491 states and 489229 transitions. [2021-12-06 22:03:05,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:03:05,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 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 579 [2021-12-06 22:03:05,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:03:05,289 INFO L225 Difference]: With dead ends: 449491 [2021-12-06 22:03:05,289 INFO L226 Difference]: Without dead ends: 222367 [2021-12-06 22:03:05,369 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 [2021-12-06 22:03:05,369 INFO L933 BasicCegarLoop]: 1468 mSDtfsCounter, 1007 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 2320 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1007 SdHoareTripleChecker+Valid, 1596 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 2320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:03:05,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1007 Valid, 1596 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 2320 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 22:03:05,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222367 states. [2021-12-06 22:03:07,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222367 to 209764. [2021-12-06 22:03:07,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209764 states, 209763 states have (on average 1.0597674518385034) internal successors, (222300), 209763 states have internal predecessors, (222300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:03:07,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209764 states to 209764 states and 222300 transitions. [2021-12-06 22:03:07,851 INFO L78 Accepts]: Start accepts. Automaton has 209764 states and 222300 transitions. Word has length 579 [2021-12-06 22:03:07,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:03:07,851 INFO L470 AbstractCegarLoop]: Abstraction has 209764 states and 222300 transitions. [2021-12-06 22:03:07,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:03:07,852 INFO L276 IsEmpty]: Start isEmpty. Operand 209764 states and 222300 transitions. [2021-12-06 22:03:07,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2021-12-06 22:03:07,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:03:07,864 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:03:07,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 22:03:07,864 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:03:07,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:03:07,865 INFO L85 PathProgramCache]: Analyzing trace with hash 181456026, now seen corresponding path program 1 times [2021-12-06 22:03:07,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:03:07,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474306650] [2021-12-06 22:03:07,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:03:07,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:03:07,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:03:07,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 827 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-12-06 22:03:07,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:03:07,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474306650] [2021-12-06 22:03:07,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474306650] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:03:07,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:03:07,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:03:07,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595694088] [2021-12-06 22:03:07,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:03:07,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:03:07,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:03:07,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:03:07,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:03:07,993 INFO L87 Difference]: Start difference. First operand 209764 states and 222300 transitions. Second operand has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:03:11,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:03:11,496 INFO L93 Difference]: Finished difference Result 420318 states and 445399 transitions. [2021-12-06 22:03:11,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:03:11,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 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 583 [2021-12-06 22:03:11,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:03:11,740 INFO L225 Difference]: With dead ends: 420318 [2021-12-06 22:03:11,740 INFO L226 Difference]: Without dead ends: 211343 [2021-12-06 22:03:11,810 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 [2021-12-06 22:03:11,810 INFO L933 BasicCegarLoop]: 1337 mSDtfsCounter, 922 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2391 mSolverCounterSat, 481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 2872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 481 IncrementalHoareTripleChecker+Valid, 2391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:03:11,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [922 Valid, 1416 Invalid, 2872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [481 Valid, 2391 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 22:03:11,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211343 states. [2021-12-06 22:03:13,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211343 to 209757. [2021-12-06 22:03:13,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209757 states, 209756 states have (on average 1.0507208375445756) internal successors, (220395), 209756 states have internal predecessors, (220395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:03:14,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209757 states to 209757 states and 220395 transitions. [2021-12-06 22:03:14,299 INFO L78 Accepts]: Start accepts. Automaton has 209757 states and 220395 transitions. Word has length 583 [2021-12-06 22:03:14,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:03:14,300 INFO L470 AbstractCegarLoop]: Abstraction has 209757 states and 220395 transitions. [2021-12-06 22:03:14,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:03:14,300 INFO L276 IsEmpty]: Start isEmpty. Operand 209757 states and 220395 transitions. [2021-12-06 22:03:14,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 635 [2021-12-06 22:03:14,319 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:03:14,320 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:03:14,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 22:03:14,320 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:03:14,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:03:14,321 INFO L85 PathProgramCache]: Analyzing trace with hash 902649876, now seen corresponding path program 1 times [2021-12-06 22:03:14,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:03:14,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665831962] [2021-12-06 22:03:14,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:03:14,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:03:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:03:14,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 624 proven. 0 refuted. 0 times theorem prover too weak. 730 trivial. 0 not checked. [2021-12-06 22:03:14,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:03:14,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665831962] [2021-12-06 22:03:14,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665831962] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:03:14,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:03:14,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:03:14,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281211172] [2021-12-06 22:03:14,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:03:14,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:03:14,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:03:14,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:03:14,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:03:14,490 INFO L87 Difference]: Start difference. First operand 209757 states and 220395 transitions. Second operand has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:03:18,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:03:18,342 INFO L93 Difference]: Finished difference Result 425051 states and 446891 transitions. [2021-12-06 22:03:18,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:03:18,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 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 634 [2021-12-06 22:03:18,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:03:18,606 INFO L225 Difference]: With dead ends: 425051 [2021-12-06 22:03:18,606 INFO L226 Difference]: Without dead ends: 233403 [2021-12-06 22:03:18,762 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 [2021-12-06 22:03:18,763 INFO L933 BasicCegarLoop]: 1761 mSDtfsCounter, 669 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 2500 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 1920 SdHoareTripleChecker+Invalid, 2664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 2500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-06 22:03:18,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 1920 Invalid, 2664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 2500 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-06 22:03:18,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233403 states. [2021-12-06 22:03:20,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233403 to 227890. [2021-12-06 22:03:20,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227890 states, 227889 states have (on average 1.04857628055764) internal successors, (238959), 227889 states have internal predecessors, (238959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:03:21,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227890 states to 227890 states and 238959 transitions. [2021-12-06 22:03:21,106 INFO L78 Accepts]: Start accepts. Automaton has 227890 states and 238959 transitions. Word has length 634 [2021-12-06 22:03:21,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:03:21,107 INFO L470 AbstractCegarLoop]: Abstraction has 227890 states and 238959 transitions. [2021-12-06 22:03:21,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:03:21,107 INFO L276 IsEmpty]: Start isEmpty. Operand 227890 states and 238959 transitions. [2021-12-06 22:03:21,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 667 [2021-12-06 22:03:21,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:03:21,126 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:03:21,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 22:03:21,126 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:03:21,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:03:21,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1901089762, now seen corresponding path program 1 times [2021-12-06 22:03:21,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:03:21,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52108721] [2021-12-06 22:03:21,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:03:21,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:03:21,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:03:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 428 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-06 22:03:21,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:03:21,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52108721] [2021-12-06 22:03:21,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52108721] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:03:21,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:03:21,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:03:21,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509648205] [2021-12-06 22:03:21,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:03:21,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:03:21,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:03:21,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:03:21,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:03:21,315 INFO L87 Difference]: Start difference. First operand 227890 states and 238959 transitions. Second operand has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:03:28,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:03:28,084 INFO L93 Difference]: Finished difference Result 549615 states and 577373 transitions. [2021-12-06 22:03:28,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:03:28,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 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 666 [2021-12-06 22:03:28,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:03:28,438 INFO L225 Difference]: With dead ends: 549615 [2021-12-06 22:03:28,438 INFO L226 Difference]: Without dead ends: 320939 [2021-12-06 22:03:28,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:03:28,521 INFO L933 BasicCegarLoop]: 525 mSDtfsCounter, 1564 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 6112 mSolverCounterSat, 720 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1564 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 6832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 720 IncrementalHoareTripleChecker+Valid, 6112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:03:28,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1564 Valid, 768 Invalid, 6832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [720 Valid, 6112 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-06 22:03:28,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320939 states. [2021-12-06 22:03:31,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320939 to 312930. [2021-12-06 22:03:31,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312930 states, 312929 states have (on average 1.0504139916722324) internal successors, (328705), 312929 states have internal predecessors, (328705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:03:32,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312930 states to 312930 states and 328705 transitions. [2021-12-06 22:03:32,005 INFO L78 Accepts]: Start accepts. Automaton has 312930 states and 328705 transitions. Word has length 666 [2021-12-06 22:03:32,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:03:32,005 INFO L470 AbstractCegarLoop]: Abstraction has 312930 states and 328705 transitions. [2021-12-06 22:03:32,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:03:32,006 INFO L276 IsEmpty]: Start isEmpty. Operand 312930 states and 328705 transitions. [2021-12-06 22:03:32,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 675 [2021-12-06 22:03:32,021 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:03:32,021 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:03:32,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 22:03:32,022 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:03:32,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:03:32,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1408718450, now seen corresponding path program 1 times [2021-12-06 22:03:32,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:03:32,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013201320] [2021-12-06 22:03:32,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:03:32,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:03:32,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:03:32,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 798 proven. 75 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-12-06 22:03:32,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:03:32,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013201320] [2021-12-06 22:03:32,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013201320] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:03:32,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162537195] [2021-12-06 22:03:32,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:03:32,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:03:32,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:03:32,238 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:03:32,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 22:03:32,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:03:32,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 22:03:32,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:03:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 936 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-12-06 22:03:33,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:03:33,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162537195] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:03:33,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:03:33,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-12-06 22:03:33,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092662089] [2021-12-06 22:03:33,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:03:33,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:03:33,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:03:33,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:03:33,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:03:33,522 INFO L87 Difference]: Start difference. First operand 312930 states and 328705 transitions. Second operand has 4 states, 4 states have (on average 141.5) internal successors, (566), 4 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:03:37,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:03:37,746 INFO L93 Difference]: Finished difference Result 606968 states and 638225 transitions. [2021-12-06 22:03:37,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:03:37,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 141.5) internal successors, (566), 4 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 674 [2021-12-06 22:03:37,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:03:38,070 INFO L225 Difference]: With dead ends: 606968 [2021-12-06 22:03:38,070 INFO L226 Difference]: Without dead ends: 316082 [2021-12-06 22:03:38,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 677 GetRequests, 674 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:03:38,149 INFO L933 BasicCegarLoop]: 619 mSDtfsCounter, 2351 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 3253 mSolverCounterSat, 541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2351 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 3794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 541 IncrementalHoareTripleChecker+Valid, 3253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:03:38,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2351 Valid, 775 Invalid, 3794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [541 Valid, 3253 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-06 22:03:38,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316082 states. [2021-12-06 22:03:41,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316082 to 313717. [2021-12-06 22:03:41,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313717 states, 313716 states have (on average 1.0483016486248709) internal successors, (328869), 313716 states have internal predecessors, (328869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:03:41,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313717 states to 313717 states and 328869 transitions. [2021-12-06 22:03:41,634 INFO L78 Accepts]: Start accepts. Automaton has 313717 states and 328869 transitions. Word has length 674 [2021-12-06 22:03:41,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:03:41,635 INFO L470 AbstractCegarLoop]: Abstraction has 313717 states and 328869 transitions. [2021-12-06 22:03:41,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 141.5) internal successors, (566), 4 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:03:41,635 INFO L276 IsEmpty]: Start isEmpty. Operand 313717 states and 328869 transitions. [2021-12-06 22:03:41,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 704 [2021-12-06 22:03:41,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:03:41,658 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:03:41,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 22:03:41,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:03:41,860 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:03:41,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:03:41,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1371639433, now seen corresponding path program 1 times [2021-12-06 22:03:41,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:03:41,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953787755] [2021-12-06 22:03:41,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:03:41,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:03:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:03:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 602 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-06 22:03:42,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:03:42,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953787755] [2021-12-06 22:03:42,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953787755] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:03:42,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:03:42,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:03:42,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994989577] [2021-12-06 22:03:42,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:03:42,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:03:42,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:03:42,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:03:42,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:03:42,247 INFO L87 Difference]: Start difference. First operand 313717 states and 328869 transitions. Second operand has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:03:46,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:03:46,802 INFO L93 Difference]: Finished difference Result 681766 states and 716527 transitions. [2021-12-06 22:03:46,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:03:46,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 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 703 [2021-12-06 22:03:46,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:03:47,379 INFO L225 Difference]: With dead ends: 681766 [2021-12-06 22:03:47,379 INFO L226 Difference]: Without dead ends: 390093 [2021-12-06 22:03:47,506 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 [2021-12-06 22:03:47,507 INFO L933 BasicCegarLoop]: 542 mSDtfsCounter, 962 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 2356 mSolverCounterSat, 902 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 3258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 902 IncrementalHoareTripleChecker+Valid, 2356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:03:47,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [962 Valid, 618 Invalid, 3258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [902 Valid, 2356 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-06 22:03:47,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390093 states. [2021-12-06 22:03:50,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390093 to 386149. [2021-12-06 22:03:51,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386149 states, 386148 states have (on average 1.0456793768192507) internal successors, (403787), 386148 states have internal predecessors, (403787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:03:51,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386149 states to 386149 states and 403787 transitions. [2021-12-06 22:03:51,702 INFO L78 Accepts]: Start accepts. Automaton has 386149 states and 403787 transitions. Word has length 703 [2021-12-06 22:03:51,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:03:51,703 INFO L470 AbstractCegarLoop]: Abstraction has 386149 states and 403787 transitions. [2021-12-06 22:03:51,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:03:51,703 INFO L276 IsEmpty]: Start isEmpty. Operand 386149 states and 403787 transitions. [2021-12-06 22:03:51,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 728 [2021-12-06 22:03:51,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:03:51,726 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:03:51,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 22:03:51,726 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:03:51,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:03:51,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1055194069, now seen corresponding path program 1 times [2021-12-06 22:03:51,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:03:51,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815121059] [2021-12-06 22:03:51,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:03:51,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:03:51,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:03:51,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 680 proven. 0 refuted. 0 times theorem prover too weak. 598 trivial. 0 not checked. [2021-12-06 22:03:51,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:03:51,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815121059] [2021-12-06 22:03:51,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815121059] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:03:51,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:03:51,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:03:51,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270872612] [2021-12-06 22:03:51,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:03:51,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:03:51,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:03:51,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:03:51,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:03:51,934 INFO L87 Difference]: Start difference. First operand 386149 states and 403787 transitions. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:03:56,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:03:56,845 INFO L93 Difference]: Finished difference Result 790436 states and 826767 transitions. [2021-12-06 22:03:56,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:03:56,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 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 727 [2021-12-06 22:03:56,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:03:57,375 INFO L225 Difference]: With dead ends: 790436 [2021-12-06 22:03:57,375 INFO L226 Difference]: Without dead ends: 420035 [2021-12-06 22:03:57,489 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 [2021-12-06 22:03:57,490 INFO L933 BasicCegarLoop]: 1711 mSDtfsCounter, 669 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 2429 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 1870 SdHoareTripleChecker+Invalid, 2627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 2429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:03:57,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 1870 Invalid, 2627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 2429 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-06 22:03:57,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420035 states. [2021-12-06 22:04:01,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420035 to 391661. [2021-12-06 22:04:01,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391661 states, 391660 states have (on average 1.0448041668794363) internal successors, (409208), 391660 states have internal predecessors, (409208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:01,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391661 states to 391661 states and 409208 transitions. [2021-12-06 22:04:01,869 INFO L78 Accepts]: Start accepts. Automaton has 391661 states and 409208 transitions. Word has length 727 [2021-12-06 22:04:01,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:04:01,870 INFO L470 AbstractCegarLoop]: Abstraction has 391661 states and 409208 transitions. [2021-12-06 22:04:01,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:01,870 INFO L276 IsEmpty]: Start isEmpty. Operand 391661 states and 409208 transitions. [2021-12-06 22:04:01,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 746 [2021-12-06 22:04:01,895 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:04:01,895 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:04:01,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 22:04:01,895 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:04:01,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:04:01,896 INFO L85 PathProgramCache]: Analyzing trace with hash 474674130, now seen corresponding path program 1 times [2021-12-06 22:04:01,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:04:01,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853745415] [2021-12-06 22:04:01,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:04:01,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:04:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:04:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1437 backedges. 955 proven. 0 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2021-12-06 22:04:02,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:04:02,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853745415] [2021-12-06 22:04:02,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853745415] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:04:02,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:04:02,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:04:02,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415047970] [2021-12-06 22:04:02,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:04:02,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:04:02,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:04:02,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:04:02,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:04:02,309 INFO L87 Difference]: Start difference. First operand 391661 states and 409208 transitions. Second operand has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:06,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:04:06,308 INFO L93 Difference]: Finished difference Result 759736 states and 794204 transitions. [2021-12-06 22:04:06,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:04:06,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 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 745 [2021-12-06 22:04:06,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:04:06,754 INFO L225 Difference]: With dead ends: 759736 [2021-12-06 22:04:06,754 INFO L226 Difference]: Without dead ends: 386968 [2021-12-06 22:04:06,882 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 [2021-12-06 22:04:06,883 INFO L933 BasicCegarLoop]: 1615 mSDtfsCounter, 614 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 2396 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 1739 SdHoareTripleChecker+Invalid, 2597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 2396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:04:06,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 1739 Invalid, 2597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 2396 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 22:04:07,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386968 states. [2021-12-06 22:04:10,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386968 to 375118. [2021-12-06 22:04:10,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375118 states, 375117 states have (on average 1.043151869949909) internal successors, (391304), 375117 states have internal predecessors, (391304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:11,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375118 states to 375118 states and 391304 transitions. [2021-12-06 22:04:11,264 INFO L78 Accepts]: Start accepts. Automaton has 375118 states and 391304 transitions. Word has length 745 [2021-12-06 22:04:11,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:04:11,264 INFO L470 AbstractCegarLoop]: Abstraction has 375118 states and 391304 transitions. [2021-12-06 22:04:11,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:11,265 INFO L276 IsEmpty]: Start isEmpty. Operand 375118 states and 391304 transitions. [2021-12-06 22:04:11,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 769 [2021-12-06 22:04:11,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:04:11,290 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:04:11,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 22:04:11,291 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:04:11,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:04:11,291 INFO L85 PathProgramCache]: Analyzing trace with hash -311812933, now seen corresponding path program 1 times [2021-12-06 22:04:11,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:04:11,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999239705] [2021-12-06 22:04:11,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:04:11,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:04:11,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:04:11,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 989 proven. 0 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2021-12-06 22:04:11,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:04:11,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999239705] [2021-12-06 22:04:11,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999239705] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:04:11,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:04:11,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:04:11,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12520205] [2021-12-06 22:04:11,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:04:11,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:04:11,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:04:11,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:04:11,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:04:11,491 INFO L87 Difference]: Start difference. First operand 375118 states and 391304 transitions. Second operand has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:16,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:04:16,378 INFO L93 Difference]: Finished difference Result 742354 states and 774507 transitions. [2021-12-06 22:04:16,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:04:16,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 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 768 [2021-12-06 22:04:16,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:04:16,943 INFO L225 Difference]: With dead ends: 742354 [2021-12-06 22:04:16,943 INFO L226 Difference]: Without dead ends: 370388 [2021-12-06 22:04:17,053 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 [2021-12-06 22:04:17,053 INFO L933 BasicCegarLoop]: 1618 mSDtfsCounter, 642 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 2380 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 2757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 2380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:04:17,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 1748 Invalid, 2757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 2380 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-06 22:04:17,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370388 states. [2021-12-06 22:04:20,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370388 to 367229. [2021-12-06 22:04:20,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367229 states, 367228 states have (on average 1.0342566470966266) internal successors, (379808), 367228 states have internal predecessors, (379808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:20,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367229 states to 367229 states and 379808 transitions. [2021-12-06 22:04:20,993 INFO L78 Accepts]: Start accepts. Automaton has 367229 states and 379808 transitions. Word has length 768 [2021-12-06 22:04:20,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:04:20,994 INFO L470 AbstractCegarLoop]: Abstraction has 367229 states and 379808 transitions. [2021-12-06 22:04:20,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:20,994 INFO L276 IsEmpty]: Start isEmpty. Operand 367229 states and 379808 transitions. [2021-12-06 22:04:21,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 778 [2021-12-06 22:04:21,021 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:04:21,022 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:04:21,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 22:04:21,022 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:04:21,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:04:21,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1561219945, now seen corresponding path program 1 times [2021-12-06 22:04:21,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:04:21,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050634643] [2021-12-06 22:04:21,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:04:21,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:04:21,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:04:21,580 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 197 proven. 276 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-06 22:04:21,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:04:21,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050634643] [2021-12-06 22:04:21,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050634643] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:04:21,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194003598] [2021-12-06 22:04:21,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:04:21,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:04:21,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:04:21,582 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:04:21,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 22:04:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:04:21,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 22:04:21,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:04:22,552 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 529 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-12-06 22:04:22,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:04:22,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194003598] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:04:22,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:04:22,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-06 22:04:22,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661806143] [2021-12-06 22:04:22,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:04:22,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:04:22,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:04:22,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:04:22,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-06 22:04:22,554 INFO L87 Difference]: Start difference. First operand 367229 states and 379808 transitions. Second operand has 4 states, 4 states have (on average 150.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:29,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:04:29,686 INFO L93 Difference]: Finished difference Result 766050 states and 792126 transitions. [2021-12-06 22:04:29,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:04:29,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 150.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 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 777 [2021-12-06 22:04:29,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:04:30,164 INFO L225 Difference]: With dead ends: 766050 [2021-12-06 22:04:30,165 INFO L226 Difference]: Without dead ends: 401973 [2021-12-06 22:04:30,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 775 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-06 22:04:30,295 INFO L933 BasicCegarLoop]: 558 mSDtfsCounter, 1646 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 5408 mSolverCounterSat, 666 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1646 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 6074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 666 IncrementalHoareTripleChecker+Valid, 5408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:04:30,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1646 Valid, 725 Invalid, 6074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [666 Valid, 5408 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-06 22:04:30,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401973 states. [2021-12-06 22:04:34,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401973 to 391639. [2021-12-06 22:04:34,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391639 states, 391638 states have (on average 1.0339982330621647) internal successors, (404953), 391638 states have internal predecessors, (404953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:34,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391639 states to 391639 states and 404953 transitions. [2021-12-06 22:04:34,540 INFO L78 Accepts]: Start accepts. Automaton has 391639 states and 404953 transitions. Word has length 777 [2021-12-06 22:04:34,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:04:34,540 INFO L470 AbstractCegarLoop]: Abstraction has 391639 states and 404953 transitions. [2021-12-06 22:04:34,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:34,540 INFO L276 IsEmpty]: Start isEmpty. Operand 391639 states and 404953 transitions. [2021-12-06 22:04:34,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 821 [2021-12-06 22:04:34,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:04:34,555 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:04:34,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 22:04:34,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 22:04:34,757 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:04:34,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:04:34,758 INFO L85 PathProgramCache]: Analyzing trace with hash 792038098, now seen corresponding path program 1 times [2021-12-06 22:04:34,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:04:34,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551635817] [2021-12-06 22:04:34,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:04:34,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:04:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:04:35,238 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 792 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-06 22:04:35,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:04:35,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551635817] [2021-12-06 22:04:35,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551635817] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:04:35,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:04:35,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:04:35,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381851027] [2021-12-06 22:04:35,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:04:35,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:04:35,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:04:35,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:04:35,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:04:35,240 INFO L87 Difference]: Start difference. First operand 391639 states and 404953 transitions. Second operand has 3 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:39,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:04:39,754 INFO L93 Difference]: Finished difference Result 765974 states and 792339 transitions. [2021-12-06 22:04:39,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:04:39,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 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 820 [2021-12-06 22:04:39,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:04:40,206 INFO L225 Difference]: With dead ends: 765974 [2021-12-06 22:04:40,206 INFO L226 Difference]: Without dead ends: 391652 [2021-12-06 22:04:40,320 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 [2021-12-06 22:04:40,321 INFO L933 BasicCegarLoop]: 1615 mSDtfsCounter, 630 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 2435 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 1741 SdHoareTripleChecker+Invalid, 2560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 2435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-06 22:04:40,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [630 Valid, 1741 Invalid, 2560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 2435 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-06 22:04:40,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391652 states. [2021-12-06 22:04:43,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391652 to 386126. [2021-12-06 22:04:44,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386126 states, 386125 states have (on average 1.0319404337973455) internal successors, (398458), 386125 states have internal predecessors, (398458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:44,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386126 states to 386126 states and 398458 transitions. [2021-12-06 22:04:44,407 INFO L78 Accepts]: Start accepts. Automaton has 386126 states and 398458 transitions. Word has length 820 [2021-12-06 22:04:44,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:04:44,407 INFO L470 AbstractCegarLoop]: Abstraction has 386126 states and 398458 transitions. [2021-12-06 22:04:44,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:44,408 INFO L276 IsEmpty]: Start isEmpty. Operand 386126 states and 398458 transitions. [2021-12-06 22:04:44,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 978 [2021-12-06 22:04:44,437 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:04:44,437 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:04:44,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 22:04:44,438 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:04:44,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:04:44,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1039699489, now seen corresponding path program 1 times [2021-12-06 22:04:44,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:04:44,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376796799] [2021-12-06 22:04:44,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:04:44,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:04:44,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:04:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1669 backedges. 778 proven. 0 refuted. 0 times theorem prover too weak. 891 trivial. 0 not checked. [2021-12-06 22:04:44,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:04:44,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376796799] [2021-12-06 22:04:44,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376796799] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:04:44,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:04:44,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:04:44,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703111306] [2021-12-06 22:04:44,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:04:44,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:04:44,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:04:44,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:04:44,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:04:44,971 INFO L87 Difference]: Start difference. First operand 386126 states and 398458 transitions. Second operand has 4 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:52,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:04:52,002 INFO L93 Difference]: Finished difference Result 901488 states and 930467 transitions. [2021-12-06 22:04:52,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:04:52,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 0 states have call successors, (0), 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 977 [2021-12-06 22:04:52,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:04:52,645 INFO L225 Difference]: With dead ends: 901488 [2021-12-06 22:04:52,645 INFO L226 Difference]: Without dead ends: 517727 [2021-12-06 22:04:52,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:04:52,940 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 1701 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 5308 mSolverCounterSat, 1422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1701 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 6730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1422 IncrementalHoareTripleChecker+Valid, 5308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:04:52,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1701 Valid, 351 Invalid, 6730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1422 Valid, 5308 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-12-06 22:04:53,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517727 states. [2021-12-06 22:04:57,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517727 to 463297. [2021-12-06 22:04:57,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463297 states, 463296 states have (on average 1.031791770272137) internal successors, (478025), 463296 states have internal predecessors, (478025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:58,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463297 states to 463297 states and 478025 transitions. [2021-12-06 22:04:58,339 INFO L78 Accepts]: Start accepts. Automaton has 463297 states and 478025 transitions. Word has length 977 [2021-12-06 22:04:58,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:04:58,340 INFO L470 AbstractCegarLoop]: Abstraction has 463297 states and 478025 transitions. [2021-12-06 22:04:58,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:04:58,340 INFO L276 IsEmpty]: Start isEmpty. Operand 463297 states and 478025 transitions. [2021-12-06 22:04:58,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 989 [2021-12-06 22:04:58,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:04:58,368 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:04:58,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-06 22:04:58,368 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:04:58,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:04:58,369 INFO L85 PathProgramCache]: Analyzing trace with hash 615288807, now seen corresponding path program 1 times [2021-12-06 22:04:58,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:04:58,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052919992] [2021-12-06 22:04:58,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:04:58,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:04:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:04:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1339 backedges. 1202 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-06 22:04:58,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:04:58,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052919992] [2021-12-06 22:04:58,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052919992] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:04:58,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:04:58,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:04:58,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601751406] [2021-12-06 22:04:58,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:04:58,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:04:58,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:04:58,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:04:58,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:04:58,883 INFO L87 Difference]: Start difference. First operand 463297 states and 478025 transitions. Second operand has 4 states, 4 states have (on average 213.25) internal successors, (853), 4 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:04,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:04,293 INFO L93 Difference]: Finished difference Result 906914 states and 936135 transitions. [2021-12-06 22:05:04,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:05:04,294 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 213.25) internal successors, (853), 4 states have internal predecessors, (853), 0 states have call successors, (0), 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 988 [2021-12-06 22:05:04,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:04,855 INFO L225 Difference]: With dead ends: 906914 [2021-12-06 22:05:04,856 INFO L226 Difference]: Without dead ends: 462512 [2021-12-06 22:05:05,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:05:05,015 INFO L933 BasicCegarLoop]: 1411 mSDtfsCounter, 1471 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 5370 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1471 SdHoareTripleChecker+Valid, 1683 SdHoareTripleChecker+Invalid, 5608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 5370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:05,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1471 Valid, 1683 Invalid, 5608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 5370 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-06 22:05:05,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462512 states. [2021-12-06 22:05:09,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462512 to 457000. [2021-12-06 22:05:09,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457000 states, 456999 states have (on average 1.0312407685793623) internal successors, (471276), 456999 states have internal predecessors, (471276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:10,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457000 states to 457000 states and 471276 transitions. [2021-12-06 22:05:10,198 INFO L78 Accepts]: Start accepts. Automaton has 457000 states and 471276 transitions. Word has length 988 [2021-12-06 22:05:10,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:10,198 INFO L470 AbstractCegarLoop]: Abstraction has 457000 states and 471276 transitions. [2021-12-06 22:05:10,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 213.25) internal successors, (853), 4 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:10,199 INFO L276 IsEmpty]: Start isEmpty. Operand 457000 states and 471276 transitions. [2021-12-06 22:05:10,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1018 [2021-12-06 22:05:10,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:10,462 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-06 22:05:10,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-06 22:05:10,462 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:10,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:10,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1500752290, now seen corresponding path program 1 times [2021-12-06 22:05:10,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:10,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650115991] [2021-12-06 22:05:10,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:10,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:10,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:10,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 670 proven. 479 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-06 22:05:10,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:10,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650115991] [2021-12-06 22:05:10,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650115991] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:10,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431258855] [2021-12-06 22:05:10,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:10,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:10,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:05:10,854 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:05:10,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 22:05:11,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:11,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 1211 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 22:05:11,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:05:12,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 495 proven. 654 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-06 22:05:12,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:05:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 802 proven. 0 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-12-06 22:05:12,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431258855] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 22:05:12,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:05:12,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 4] total 14 [2021-12-06 22:05:12,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732289438] [2021-12-06 22:05:12,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:05:12,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:05:12,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:12,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:05:12,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-06 22:05:12,925 INFO L87 Difference]: Start difference. First operand 457000 states and 471276 transitions. Second operand has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:20,766 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.38s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-06 22:05:22,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:22,461 INFO L93 Difference]: Finished difference Result 986427 states and 1017254 transitions. [2021-12-06 22:05:22,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:05:22,462 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 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 1017 [2021-12-06 22:05:22,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:23,138 INFO L225 Difference]: With dead ends: 986427 [2021-12-06 22:05:23,138 INFO L226 Difference]: Without dead ends: 548322 [2021-12-06 22:05:23,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2040 GetRequests, 2028 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-06 22:05:23,256 INFO L933 BasicCegarLoop]: 452 mSDtfsCounter, 1508 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 4839 mSolverCounterSat, 747 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1508 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 5587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 747 IncrementalHoareTripleChecker+Valid, 4839 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:23,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1508 Valid, 661 Invalid, 5587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [747 Valid, 4839 Invalid, 1 Unknown, 0 Unchecked, 7.3s Time] [2021-12-06 22:05:23,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548322 states. [2021-12-06 22:05:27,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548322 to 390868. [2021-12-06 22:05:27,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390868 states, 390867 states have (on average 1.029375721153231) internal successors, (402349), 390867 states have internal predecessors, (402349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:28,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390868 states to 390868 states and 402349 transitions. [2021-12-06 22:05:28,144 INFO L78 Accepts]: Start accepts. Automaton has 390868 states and 402349 transitions. Word has length 1017 [2021-12-06 22:05:28,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:28,145 INFO L470 AbstractCegarLoop]: Abstraction has 390868 states and 402349 transitions. [2021-12-06 22:05:28,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:28,145 INFO L276 IsEmpty]: Start isEmpty. Operand 390868 states and 402349 transitions. [2021-12-06 22:05:28,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1075 [2021-12-06 22:05:28,180 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:28,180 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:28,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 22:05:28,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d35bc84e-fc78-4618-bfd4-57f9fa9374ec/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:05:28,383 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:28,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:28,384 INFO L85 PathProgramCache]: Analyzing trace with hash 61978573, now seen corresponding path program 1 times [2021-12-06 22:05:28,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:28,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136681675] [2021-12-06 22:05:28,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:28,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:28,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:28,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1675 backedges. 1196 proven. 0 refuted. 0 times theorem prover too weak. 479 trivial. 0 not checked. [2021-12-06 22:05:28,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:28,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136681675] [2021-12-06 22:05:28,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136681675] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:05:28,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:05:28,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:05:28,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648647369] [2021-12-06 22:05:28,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:05:28,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:05:28,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:28,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:05:28,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:05:28,749 INFO L87 Difference]: Start difference. First operand 390868 states and 402349 transitions. Second operand has 4 states, 4 states have (on average 173.25) internal successors, (693), 4 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:35,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:35,077 INFO L93 Difference]: Finished difference Result 799120 states and 822812 transitions. [2021-12-06 22:05:35,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:05:35,078 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 173.25) internal successors, (693), 4 states have internal predecessors, (693), 0 states have call successors, (0), 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 1074 [2021-12-06 22:05:35,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:35,722 INFO L225 Difference]: With dead ends: 799120 [2021-12-06 22:05:35,723 INFO L226 Difference]: Without dead ends: 411404 [2021-12-06 22:05:35,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:05:35,849 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 1556 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 5149 mSolverCounterSat, 938 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1556 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 6087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 938 IncrementalHoareTripleChecker+Valid, 5149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:35,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1556 Valid, 508 Invalid, 6087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [938 Valid, 5149 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-12-06 22:05:36,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411404 states. [2021-12-06 22:05:39,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411404 to 397947. [2021-12-06 22:05:39,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397947 states, 397946 states have (on average 1.0290240384373759) internal successors, (409496), 397946 states have internal predecessors, (409496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:40,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397947 states to 397947 states and 409496 transitions. [2021-12-06 22:05:40,269 INFO L78 Accepts]: Start accepts. Automaton has 397947 states and 409496 transitions. Word has length 1074 [2021-12-06 22:05:40,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:05:40,270 INFO L470 AbstractCegarLoop]: Abstraction has 397947 states and 409496 transitions. [2021-12-06 22:05:40,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.25) internal successors, (693), 4 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:40,270 INFO L276 IsEmpty]: Start isEmpty. Operand 397947 states and 409496 transitions. [2021-12-06 22:05:40,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1103 [2021-12-06 22:05:40,312 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:05:40,313 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:05:40,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-06 22:05:40,313 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:05:40,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:05:40,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1205614891, now seen corresponding path program 1 times [2021-12-06 22:05:40,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:05:40,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169868557] [2021-12-06 22:05:40,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:05:40,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:05:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:05:40,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1867 backedges. 1373 proven. 0 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2021-12-06 22:05:40,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:05:40,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169868557] [2021-12-06 22:05:40,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169868557] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:05:40,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:05:40,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:05:40,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858401293] [2021-12-06 22:05:40,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:05:40,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:05:40,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:05:40,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:05:40,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:05:40,602 INFO L87 Difference]: Start difference. First operand 397947 states and 409496 transitions. Second operand has 3 states, 3 states have (on average 245.66666666666666) internal successors, (737), 3 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:05:45,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:05:45,167 INFO L93 Difference]: Finished difference Result 795114 states and 818377 transitions. [2021-12-06 22:05:45,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:05:45,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 245.66666666666666) internal successors, (737), 3 states have internal predecessors, (737), 0 states have call successors, (0), 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 1102 [2021-12-06 22:05:45,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:05:45,821 INFO L225 Difference]: With dead ends: 795114 [2021-12-06 22:05:45,821 INFO L226 Difference]: Without dead ends: 401106 [2021-12-06 22:05:45,936 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 [2021-12-06 22:05:45,936 INFO L933 BasicCegarLoop]: 1656 mSDtfsCounter, 725 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 2347 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 1782 SdHoareTripleChecker+Invalid, 2469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 2347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 22:05:45,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [725 Valid, 1782 Invalid, 2469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 2347 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 22:05:46,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401106 states.