./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec6_product35.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be2d09b-7438-4805-8a86-264850554572/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be2d09b-7438-4805-8a86-264850554572/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be2d09b-7438-4805-8a86-264850554572/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be2d09b-7438-4805-8a86-264850554572/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec6_product35.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be2d09b-7438-4805-8a86-264850554572/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be2d09b-7438-4805-8a86-264850554572/bin/uautomizer-tBqnrhUYjU --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 4b1644ee409dd7fb9188781699149bb283de125dad063a54175775584b617862 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:38:08,241 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:38:08,245 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:38:08,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:38:08,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:38:08,308 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:38:08,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:38:08,314 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:38:08,317 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:38:08,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:38:08,324 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:38:08,326 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:38:08,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:38:08,330 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:38:08,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:38:08,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:38:08,339 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:38:08,340 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:38:08,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:38:08,351 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:38:08,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:38:08,355 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:38:08,358 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:38:08,359 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:38:08,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:38:08,369 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:38:08,369 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:38:08,371 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:38:08,372 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:38:08,374 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:38:08,374 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:38:08,375 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:38:08,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:38:08,379 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:38:08,380 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:38:08,381 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:38:08,381 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:38:08,382 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:38:08,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:38:08,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:38:08,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:38:08,385 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be2d09b-7438-4805-8a86-264850554572/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:38:08,428 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:38:08,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:38:08,429 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:38:08,430 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:38:08,438 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:38:08,438 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:38:08,438 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:38:08,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:38:08,439 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:38:08,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:38:08,440 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:38:08,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:38:08,441 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:38:08,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:38:08,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:38:08,442 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:38:08,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:38:08,442 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:38:08,442 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:38:08,443 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:38:08,443 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:38:08,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:38:08,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:38:08,444 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:38:08,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:38:08,444 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:38:08,444 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:38:08,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:38:08,445 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:38:08,447 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:38:08,447 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:38:08,447 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:38:08,448 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_2be2d09b-7438-4805-8a86-264850554572/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be2d09b-7438-4805-8a86-264850554572/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b1644ee409dd7fb9188781699149bb283de125dad063a54175775584b617862 [2021-11-02 22:38:08,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:38:08,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:38:08,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:38:08,842 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:38:08,843 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:38:08,844 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be2d09b-7438-4805-8a86-264850554572/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/product-lines/email_spec6_product35.cil.c [2021-11-02 22:38:08,944 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be2d09b-7438-4805-8a86-264850554572/bin/uautomizer-tBqnrhUYjU/data/5dfe1cbba/ec4cff76ef1e483f82fcce09ff9ebe18/FLAG291c95295 [2021-11-02 22:38:09,639 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:38:09,640 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be2d09b-7438-4805-8a86-264850554572/sv-benchmarks/c/product-lines/email_spec6_product35.cil.c [2021-11-02 22:38:09,679 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be2d09b-7438-4805-8a86-264850554572/bin/uautomizer-tBqnrhUYjU/data/5dfe1cbba/ec4cff76ef1e483f82fcce09ff9ebe18/FLAG291c95295 [2021-11-02 22:38:09,816 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be2d09b-7438-4805-8a86-264850554572/bin/uautomizer-tBqnrhUYjU/data/5dfe1cbba/ec4cff76ef1e483f82fcce09ff9ebe18 [2021-11-02 22:38:09,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:38:09,824 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:38:09,828 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:38:09,828 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:38:09,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:38:09,833 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:38:09" (1/1) ... [2021-11-02 22:38:09,835 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18fa94a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:09, skipping insertion in model container [2021-11-02 22:38:09,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:38:09" (1/1) ... [2021-11-02 22:38:09,844 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:38:09,950 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:38:10,555 WARN L228 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_2be2d09b-7438-4805-8a86-264850554572/sv-benchmarks/c/product-lines/email_spec6_product35.cil.c[24735,24748] [2021-11-02 22:38:10,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:38:10,776 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:38:10,855 WARN L228 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_2be2d09b-7438-4805-8a86-264850554572/sv-benchmarks/c/product-lines/email_spec6_product35.cil.c[24735,24748] [2021-11-02 22:38:10,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:38:10,993 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:38:10,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:10 WrapperNode [2021-11-02 22:38:10,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:38:10,995 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:38:10,995 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:38:10,996 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:38:11,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:10" (1/1) ... [2021-11-02 22:38:11,058 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:10" (1/1) ... [2021-11-02 22:38:11,328 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:38:11,329 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:38:11,329 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:38:11,330 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:38:11,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:10" (1/1) ... [2021-11-02 22:38:11,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:10" (1/1) ... [2021-11-02 22:38:11,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:10" (1/1) ... [2021-11-02 22:38:11,383 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:10" (1/1) ... [2021-11-02 22:38:11,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:10" (1/1) ... [2021-11-02 22:38:11,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:10" (1/1) ... [2021-11-02 22:38:11,583 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:10" (1/1) ... [2021-11-02 22:38:11,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:38:11,650 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:38:11,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:38:11,652 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:38:11,653 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:10" (1/1) ... [2021-11-02 22:38:11,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:38:11,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be2d09b-7438-4805-8a86-264850554572/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:38:11,696 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be2d09b-7438-4805-8a86-264850554572/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:38:11,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be2d09b-7438-4805-8a86-264850554572/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:38:11,741 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-02 22:38:11,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:38:11,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:38:11,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:38:11,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:38:16,100 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:38:16,100 INFO L299 CfgBuilder]: Removed 961 assume(true) statements. [2021-11-02 22:38:16,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:38:16 BoogieIcfgContainer [2021-11-02 22:38:16,107 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:38:16,109 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:38:16,109 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:38:16,113 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:38:16,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:38:09" (1/3) ... [2021-11-02 22:38:16,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@104c8216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:38:16, skipping insertion in model container [2021-11-02 22:38:16,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:38:10" (2/3) ... [2021-11-02 22:38:16,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@104c8216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:38:16, skipping insertion in model container [2021-11-02 22:38:16,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:38:16" (3/3) ... [2021-11-02 22:38:16,117 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec6_product35.cil.c [2021-11-02 22:38:16,126 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:38:16,126 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-02 22:38:16,192 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:38:16,199 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:38:16,199 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-02 22:38:16,246 INFO L276 IsEmpty]: Start isEmpty. Operand has 1384 states, 1377 states have (on average 1.7189542483660132) internal successors, (2367), 1383 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:16,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-02 22:38:16,261 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:38:16,262 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:38:16,263 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-02 22:38:16,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:38:16,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1580358661, now seen corresponding path program 1 times [2021-11-02 22:38:16,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:38:16,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104118811] [2021-11-02 22:38:16,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:16,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:38:16,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:16,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:38:16,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:38:16,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104118811] [2021-11-02 22:38:16,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104118811] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:38:16,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:38:16,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:38:16,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756183971] [2021-11-02 22:38:16,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:38:16,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:38:16,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:38:16,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:38:16,738 INFO L87 Difference]: Start difference. First operand has 1384 states, 1377 states have (on average 1.7189542483660132) internal successors, (2367), 1383 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:16,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:38:16,990 INFO L93 Difference]: Finished difference Result 4117 states and 7043 transitions. [2021-11-02 22:38:16,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:38:16,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-02 22:38:16,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:38:17,027 INFO L225 Difference]: With dead ends: 4117 [2021-11-02 22:38:17,027 INFO L226 Difference]: Without dead ends: 2284 [2021-11-02 22:38:17,039 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:38:17,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2021-11-02 22:38:17,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 1151. [2021-11-02 22:38:17,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 1145 states have (on average 1.7187772925764193) internal successors, (1968), 1150 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:17,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1968 transitions. [2021-11-02 22:38:17,203 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1968 transitions. Word has length 57 [2021-11-02 22:38:17,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:38:17,204 INFO L470 AbstractCegarLoop]: Abstraction has 1151 states and 1968 transitions. [2021-11-02 22:38:17,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:17,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1968 transitions. [2021-11-02 22:38:17,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-02 22:38:17,214 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:38:17,215 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:38:17,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:38:17,215 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-02 22:38:17,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:38:17,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1959785708, now seen corresponding path program 1 times [2021-11-02 22:38:17,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:38:17,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30877685] [2021-11-02 22:38:17,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:17,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:38:17,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:17,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:38:17,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:38:17,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30877685] [2021-11-02 22:38:17,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30877685] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:38:17,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:38:17,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:38:17,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143146363] [2021-11-02 22:38:17,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:38:17,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:38:17,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:38:17,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:38:17,429 INFO L87 Difference]: Start difference. First operand 1151 states and 1968 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:17,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:38:17,691 INFO L93 Difference]: Finished difference Result 3402 states and 5820 transitions. [2021-11-02 22:38:17,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:38:17,691 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-02 22:38:17,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:38:17,709 INFO L225 Difference]: With dead ends: 3402 [2021-11-02 22:38:17,709 INFO L226 Difference]: Without dead ends: 2270 [2021-11-02 22:38:17,712 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:38:17,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2021-11-02 22:38:17,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 1151. [2021-11-02 22:38:17,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 1145 states have (on average 1.7179039301310044) internal successors, (1967), 1150 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:17,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1967 transitions. [2021-11-02 22:38:17,785 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1967 transitions. Word has length 59 [2021-11-02 22:38:17,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:38:17,786 INFO L470 AbstractCegarLoop]: Abstraction has 1151 states and 1967 transitions. [2021-11-02 22:38:17,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:17,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1967 transitions. [2021-11-02 22:38:17,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-02 22:38:17,790 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:38:17,791 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:38:17,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:38:17,792 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-02 22:38:17,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:38:17,793 INFO L85 PathProgramCache]: Analyzing trace with hash -2021360729, now seen corresponding path program 1 times [2021-11-02 22:38:17,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:38:17,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660930797] [2021-11-02 22:38:17,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:17,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:38:17,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:38:17,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:38:17,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660930797] [2021-11-02 22:38:17,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660930797] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:38:17,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:38:17,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:38:17,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266950363] [2021-11-02 22:38:17,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:38:17,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:38:17,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:38:17,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:38:17,913 INFO L87 Difference]: Start difference. First operand 1151 states and 1967 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:18,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:38:18,043 INFO L93 Difference]: Finished difference Result 2284 states and 3908 transitions. [2021-11-02 22:38:18,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:38:18,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2021-11-02 22:38:18,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:38:18,051 INFO L225 Difference]: With dead ends: 2284 [2021-11-02 22:38:18,052 INFO L226 Difference]: Without dead ends: 1156 [2021-11-02 22:38:18,054 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:38:18,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2021-11-02 22:38:18,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 1151. [2021-11-02 22:38:18,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 1145 states have (on average 1.7152838427947599) internal successors, (1964), 1150 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:18,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1964 transitions. [2021-11-02 22:38:18,103 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1964 transitions. Word has length 60 [2021-11-02 22:38:18,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:38:18,103 INFO L470 AbstractCegarLoop]: Abstraction has 1151 states and 1964 transitions. [2021-11-02 22:38:18,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:18,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1964 transitions. [2021-11-02 22:38:18,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-02 22:38:18,105 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:38:18,106 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:38:18,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:38:18,106 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-02 22:38:18,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:38:18,107 INFO L85 PathProgramCache]: Analyzing trace with hash -128272532, now seen corresponding path program 1 times [2021-11-02 22:38:18,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:38:18,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946639972] [2021-11-02 22:38:18,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:18,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:38:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:38:18,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:38:18,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946639972] [2021-11-02 22:38:18,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946639972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:38:18,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:38:18,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:38:18,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874028990] [2021-11-02 22:38:18,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:38:18,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:38:18,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:38:18,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:38:18,231 INFO L87 Difference]: Start difference. First operand 1151 states and 1964 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:18,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:38:18,461 INFO L93 Difference]: Finished difference Result 3392 states and 5800 transitions. [2021-11-02 22:38:18,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:38:18,461 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-11-02 22:38:18,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:38:18,475 INFO L225 Difference]: With dead ends: 3392 [2021-11-02 22:38:18,475 INFO L226 Difference]: Without dead ends: 2268 [2021-11-02 22:38:18,478 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:38:18,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2021-11-02 22:38:18,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 1151. [2021-11-02 22:38:18,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 1145 states have (on average 1.714410480349345) internal successors, (1963), 1150 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:18,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1963 transitions. [2021-11-02 22:38:18,545 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1963 transitions. Word has length 62 [2021-11-02 22:38:18,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:38:18,546 INFO L470 AbstractCegarLoop]: Abstraction has 1151 states and 1963 transitions. [2021-11-02 22:38:18,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:18,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1963 transitions. [2021-11-02 22:38:18,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-02 22:38:18,548 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:38:18,548 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:38:18,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:38:18,549 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-02 22:38:18,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:38:18,550 INFO L85 PathProgramCache]: Analyzing trace with hash 2008138985, now seen corresponding path program 1 times [2021-11-02 22:38:18,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:38:18,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607313370] [2021-11-02 22:38:18,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:18,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:38:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:38:18,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:38:18,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607313370] [2021-11-02 22:38:18,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607313370] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:38:18,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:38:18,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:38:18,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549692483] [2021-11-02 22:38:18,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:38:18,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:38:18,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:38:18,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:38:18,697 INFO L87 Difference]: Start difference. First operand 1151 states and 1963 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:18,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:38:18,959 INFO L93 Difference]: Finished difference Result 3397 states and 5804 transitions. [2021-11-02 22:38:18,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:38:18,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-11-02 22:38:18,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:38:18,974 INFO L225 Difference]: With dead ends: 3397 [2021-11-02 22:38:18,974 INFO L226 Difference]: Without dead ends: 2273 [2021-11-02 22:38:18,977 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:38:18,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-11-02 22:38:19,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 1151. [2021-11-02 22:38:19,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 1145 states have (on average 1.71353711790393) internal successors, (1962), 1150 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:19,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1962 transitions. [2021-11-02 22:38:19,053 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1962 transitions. Word has length 63 [2021-11-02 22:38:19,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:38:19,054 INFO L470 AbstractCegarLoop]: Abstraction has 1151 states and 1962 transitions. [2021-11-02 22:38:19,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:19,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1962 transitions. [2021-11-02 22:38:19,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 22:38:19,055 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:38:19,056 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:38:19,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:38:19,056 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-02 22:38:19,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:38:19,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1568903377, now seen corresponding path program 1 times [2021-11-02 22:38:19,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:38:19,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447700494] [2021-11-02 22:38:19,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:19,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:38:19,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:19,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:38:19,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:38:19,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447700494] [2021-11-02 22:38:19,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447700494] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:38:19,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:38:19,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:38:19,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219204661] [2021-11-02 22:38:19,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:38:19,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:38:19,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:38:19,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:38:19,155 INFO L87 Difference]: Start difference. First operand 1151 states and 1962 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:19,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:38:19,226 INFO L93 Difference]: Finished difference Result 2017 states and 3411 transitions. [2021-11-02 22:38:19,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:38:19,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-02 22:38:19,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:38:19,241 INFO L225 Difference]: With dead ends: 2017 [2021-11-02 22:38:19,241 INFO L226 Difference]: Without dead ends: 1154 [2021-11-02 22:38:19,243 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:38:19,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-11-02 22:38:19,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 1153. [2021-11-02 22:38:19,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1147 states have (on average 1.7122929380993896) internal successors, (1964), 1152 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:19,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1964 transitions. [2021-11-02 22:38:19,332 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1964 transitions. Word has length 64 [2021-11-02 22:38:19,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:38:19,332 INFO L470 AbstractCegarLoop]: Abstraction has 1153 states and 1964 transitions. [2021-11-02 22:38:19,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:19,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1964 transitions. [2021-11-02 22:38:19,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-02 22:38:19,334 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:38:19,335 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:38:19,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:38:19,335 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-02 22:38:19,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:38:19,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1282091427, now seen corresponding path program 1 times [2021-11-02 22:38:19,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:38:19,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855270593] [2021-11-02 22:38:19,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:19,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:38:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:19,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:38:19,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:38:19,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855270593] [2021-11-02 22:38:19,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855270593] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:38:19,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:38:19,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:38:19,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686337515] [2021-11-02 22:38:19,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:38:19,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:38:19,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:38:19,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:38:19,460 INFO L87 Difference]: Start difference. First operand 1153 states and 1964 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:19,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:38:19,585 INFO L93 Difference]: Finished difference Result 3345 states and 5716 transitions. [2021-11-02 22:38:19,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:38:19,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-11-02 22:38:19,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:38:19,599 INFO L225 Difference]: With dead ends: 3345 [2021-11-02 22:38:19,599 INFO L226 Difference]: Without dead ends: 2223 [2021-11-02 22:38:19,602 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:38:19,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2021-11-02 22:38:19,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 1360. [2021-11-02 22:38:19,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1354 states have (on average 1.7326440177252584) internal successors, (2346), 1359 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:19,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 2346 transitions. [2021-11-02 22:38:19,688 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 2346 transitions. Word has length 72 [2021-11-02 22:38:19,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:38:19,691 INFO L470 AbstractCegarLoop]: Abstraction has 1360 states and 2346 transitions. [2021-11-02 22:38:19,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:19,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 2346 transitions. [2021-11-02 22:38:19,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-02 22:38:19,695 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:38:19,696 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:38:19,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:38:19,696 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-02 22:38:19,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:38:19,697 INFO L85 PathProgramCache]: Analyzing trace with hash 860813476, now seen corresponding path program 1 times [2021-11-02 22:38:19,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:38:19,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30977989] [2021-11-02 22:38:19,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:19,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:38:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:38:19,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:38:19,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30977989] [2021-11-02 22:38:19,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30977989] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:38:19,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:38:19,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:38:19,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007618093] [2021-11-02 22:38:19,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:38:19,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:38:19,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:38:19,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:38:19,803 INFO L87 Difference]: Start difference. First operand 1360 states and 2346 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:20,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:38:20,379 INFO L93 Difference]: Finished difference Result 4010 states and 6944 transitions. [2021-11-02 22:38:20,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:38:20,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-02 22:38:20,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:38:20,396 INFO L225 Difference]: With dead ends: 4010 [2021-11-02 22:38:20,396 INFO L226 Difference]: Without dead ends: 2681 [2021-11-02 22:38:20,399 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:38:20,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2681 states. [2021-11-02 22:38:20,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2681 to 1360. [2021-11-02 22:38:20,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1354 states have (on average 1.7311669128508125) internal successors, (2344), 1359 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:20,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 2344 transitions. [2021-11-02 22:38:20,520 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 2344 transitions. Word has length 73 [2021-11-02 22:38:20,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:38:20,521 INFO L470 AbstractCegarLoop]: Abstraction has 1360 states and 2344 transitions. [2021-11-02 22:38:20,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:20,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 2344 transitions. [2021-11-02 22:38:20,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-02 22:38:20,527 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:38:20,527 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:38:20,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:38:20,527 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-02 22:38:20,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:38:20,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1471946579, now seen corresponding path program 1 times [2021-11-02 22:38:20,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:38:20,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128355540] [2021-11-02 22:38:20,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:20,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:38:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:20,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:38:20,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:38:20,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128355540] [2021-11-02 22:38:20,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128355540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:38:20,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:38:20,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:38:20,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217443527] [2021-11-02 22:38:20,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:38:20,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:38:20,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:38:20,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:38:20,602 INFO L87 Difference]: Start difference. First operand 1360 states and 2344 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:20,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:38:20,769 INFO L93 Difference]: Finished difference Result 4008 states and 6936 transitions. [2021-11-02 22:38:20,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:38:20,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-11-02 22:38:20,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:38:20,785 INFO L225 Difference]: With dead ends: 4008 [2021-11-02 22:38:20,785 INFO L226 Difference]: Without dead ends: 2679 [2021-11-02 22:38:20,788 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:38:20,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2679 states. [2021-11-02 22:38:20,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2679 to 1816. [2021-11-02 22:38:20,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1810 states have (on average 1.7596685082872927) internal successors, (3185), 1815 states have internal predecessors, (3185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:20,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 3185 transitions. [2021-11-02 22:38:20,919 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 3185 transitions. Word has length 74 [2021-11-02 22:38:20,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:38:20,919 INFO L470 AbstractCegarLoop]: Abstraction has 1816 states and 3185 transitions. [2021-11-02 22:38:20,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:20,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 3185 transitions. [2021-11-02 22:38:20,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-02 22:38:20,922 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:38:20,922 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:38:20,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:38:20,923 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-02 22:38:20,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:38:20,923 INFO L85 PathProgramCache]: Analyzing trace with hash -148767537, now seen corresponding path program 1 times [2021-11-02 22:38:20,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:38:20,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122004724] [2021-11-02 22:38:20,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:20,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:38:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:21,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:38:21,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:38:21,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122004724] [2021-11-02 22:38:21,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122004724] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:38:21,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965177320] [2021-11-02 22:38:21,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:21,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:38:21,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be2d09b-7438-4805-8a86-264850554572/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:38:21,029 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be2d09b-7438-4805-8a86-264850554572/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:38:21,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be2d09b-7438-4805-8a86-264850554572/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:38:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:21,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:38:21,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:38:21,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:38:21,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965177320] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:38:21,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:38:21,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-02 22:38:21,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807610586] [2021-11-02 22:38:21,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:38:21,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:38:21,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:38:21,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:38:21,679 INFO L87 Difference]: Start difference. First operand 1816 states and 3185 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:21,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:38:21,896 INFO L93 Difference]: Finished difference Result 3808 states and 6560 transitions. [2021-11-02 22:38:21,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:38:21,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-02 22:38:21,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:38:21,914 INFO L225 Difference]: With dead ends: 3808 [2021-11-02 22:38:21,914 INFO L226 Difference]: Without dead ends: 2945 [2021-11-02 22:38:21,917 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:38:21,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2945 states. [2021-11-02 22:38:22,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2945 to 2079. [2021-11-02 22:38:22,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 2073 states have (on average 1.76748673420164) internal successors, (3664), 2078 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:22,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 3664 transitions. [2021-11-02 22:38:22,063 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 3664 transitions. Word has length 74 [2021-11-02 22:38:22,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:38:22,064 INFO L470 AbstractCegarLoop]: Abstraction has 2079 states and 3664 transitions. [2021-11-02 22:38:22,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:22,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 3664 transitions. [2021-11-02 22:38:22,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-02 22:38:22,067 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:38:22,068 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:38:22,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be2d09b-7438-4805-8a86-264850554572/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:38:22,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be2d09b-7438-4805-8a86-264850554572/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 22:38:22,284 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-02 22:38:22,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:38:22,285 INFO L85 PathProgramCache]: Analyzing trace with hash 129366098, now seen corresponding path program 1 times [2021-11-02 22:38:22,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:38:22,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39702808] [2021-11-02 22:38:22,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:22,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:38:22,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:22,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:38:22,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:38:22,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39702808] [2021-11-02 22:38:22,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39702808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:38:22,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:38:22,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:38:22,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816595173] [2021-11-02 22:38:22,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:38:22,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:38:22,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:38:22,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:38:22,369 INFO L87 Difference]: Start difference. First operand 2079 states and 3664 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:22,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:38:22,606 INFO L93 Difference]: Finished difference Result 5824 states and 10277 transitions. [2021-11-02 22:38:22,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:38:22,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-02 22:38:22,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:38:22,634 INFO L225 Difference]: With dead ends: 5824 [2021-11-02 22:38:22,634 INFO L226 Difference]: Without dead ends: 3846 [2021-11-02 22:38:22,638 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:38:22,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3846 states. [2021-11-02 22:38:22,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3846 to 2983. [2021-11-02 22:38:22,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2983 states, 2977 states have (on average 1.7887134699361773) internal successors, (5325), 2982 states have internal predecessors, (5325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:22,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2983 states to 2983 states and 5325 transitions. [2021-11-02 22:38:22,839 INFO L78 Accepts]: Start accepts. Automaton has 2983 states and 5325 transitions. Word has length 78 [2021-11-02 22:38:22,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:38:22,840 INFO L470 AbstractCegarLoop]: Abstraction has 2983 states and 5325 transitions. [2021-11-02 22:38:22,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:22,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2983 states and 5325 transitions. [2021-11-02 22:38:22,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-02 22:38:22,846 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:38:22,846 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:38:22,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:38:22,846 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-02 22:38:22,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:38:22,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1970042158, now seen corresponding path program 1 times [2021-11-02 22:38:22,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:38:22,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258380110] [2021-11-02 22:38:22,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:22,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:38:22,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:22,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:38:22,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:38:22,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258380110] [2021-11-02 22:38:22,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258380110] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:38:22,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:38:22,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:38:22,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720615896] [2021-11-02 22:38:22,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:38:22,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:38:22,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:38:22,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:38:22,921 INFO L87 Difference]: Start difference. First operand 2983 states and 5325 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:23,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:38:23,219 INFO L93 Difference]: Finished difference Result 8272 states and 14779 transitions. [2021-11-02 22:38:23,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:38:23,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-02 22:38:23,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:38:23,232 INFO L225 Difference]: With dead ends: 8272 [2021-11-02 22:38:23,233 INFO L226 Difference]: Without dead ends: 5424 [2021-11-02 22:38:23,237 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:38:23,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5424 states. [2021-11-02 22:38:23,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5424 to 4561. [2021-11-02 22:38:23,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4561 states, 4555 states have (on average 1.8050493962678376) internal successors, (8222), 4560 states have internal predecessors, (8222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:23,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4561 states to 4561 states and 8222 transitions. [2021-11-02 22:38:23,525 INFO L78 Accepts]: Start accepts. Automaton has 4561 states and 8222 transitions. Word has length 79 [2021-11-02 22:38:23,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:38:23,526 INFO L470 AbstractCegarLoop]: Abstraction has 4561 states and 8222 transitions. [2021-11-02 22:38:23,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:23,527 INFO L276 IsEmpty]: Start isEmpty. Operand 4561 states and 8222 transitions. [2021-11-02 22:38:23,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-02 22:38:23,536 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:38:23,537 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:38:23,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:38:23,537 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-02 22:38:23,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:38:23,538 INFO L85 PathProgramCache]: Analyzing trace with hash -2051555903, now seen corresponding path program 1 times [2021-11-02 22:38:23,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:38:23,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590989669] [2021-11-02 22:38:23,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:23,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:38:23,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:23,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:38:23,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:38:23,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590989669] [2021-11-02 22:38:23,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590989669] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:38:23,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:38:23,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:38:23,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727542268] [2021-11-02 22:38:23,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:38:23,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:38:23,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:38:23,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:38:23,610 INFO L87 Difference]: Start difference. First operand 4561 states and 8222 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:24,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:38:24,026 INFO L93 Difference]: Finished difference Result 12722 states and 22953 transitions. [2021-11-02 22:38:24,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:38:24,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-02 22:38:24,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:38:24,052 INFO L225 Difference]: With dead ends: 12722 [2021-11-02 22:38:24,053 INFO L226 Difference]: Without dead ends: 8330 [2021-11-02 22:38:24,066 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:38:24,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8330 states. [2021-11-02 22:38:24,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8330 to 7467. [2021-11-02 22:38:24,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7467 states, 7461 states have (on average 1.8162444712505026) internal successors, (13551), 7466 states have internal predecessors, (13551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:24,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7467 states to 7467 states and 13551 transitions. [2021-11-02 22:38:24,518 INFO L78 Accepts]: Start accepts. Automaton has 7467 states and 13551 transitions. Word has length 80 [2021-11-02 22:38:24,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:38:24,519 INFO L470 AbstractCegarLoop]: Abstraction has 7467 states and 13551 transitions. [2021-11-02 22:38:24,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:24,519 INFO L276 IsEmpty]: Start isEmpty. Operand 7467 states and 13551 transitions. [2021-11-02 22:38:24,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-02 22:38:24,528 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:38:24,529 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:38:24,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 22:38:24,529 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-02 22:38:24,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:38:24,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1736269153, now seen corresponding path program 1 times [2021-11-02 22:38:24,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:38:24,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402902532] [2021-11-02 22:38:24,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:24,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:38:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:24,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:38:24,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:38:24,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402902532] [2021-11-02 22:38:24,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402902532] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:38:24,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:38:24,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:38:24,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491278565] [2021-11-02 22:38:24,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:38:24,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:38:24,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:38:24,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:38:24,600 INFO L87 Difference]: Start difference. First operand 7467 states and 13551 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:25,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:38:25,223 INFO L93 Difference]: Finished difference Result 21766 states and 39551 transitions. [2021-11-02 22:38:25,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:38:25,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-02 22:38:25,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:38:25,269 INFO L225 Difference]: With dead ends: 21766 [2021-11-02 22:38:25,269 INFO L226 Difference]: Without dead ends: 14476 [2021-11-02 22:38:25,282 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:38:25,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14476 states. [2021-11-02 22:38:25,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14476 to 13613. [2021-11-02 22:38:25,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13613 states, 13607 states have (on average 1.8237671786580436) internal successors, (24816), 13612 states have internal predecessors, (24816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:25,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13613 states to 13613 states and 24816 transitions. [2021-11-02 22:38:25,918 INFO L78 Accepts]: Start accepts. Automaton has 13613 states and 24816 transitions. Word has length 81 [2021-11-02 22:38:25,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:38:25,918 INFO L470 AbstractCegarLoop]: Abstraction has 13613 states and 24816 transitions. [2021-11-02 22:38:25,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:25,919 INFO L276 IsEmpty]: Start isEmpty. Operand 13613 states and 24816 transitions. [2021-11-02 22:38:25,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-02 22:38:25,932 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:38:25,932 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:38:25,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 22:38:25,933 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-02 22:38:25,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:38:25,934 INFO L85 PathProgramCache]: Analyzing trace with hash -2004915406, now seen corresponding path program 1 times [2021-11-02 22:38:25,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:38:25,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899579226] [2021-11-02 22:38:25,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:25,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:38:25,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:38:26,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:38:26,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899579226] [2021-11-02 22:38:26,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899579226] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:38:26,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:38:26,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:38:26,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042796717] [2021-11-02 22:38:26,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:38:26,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:38:26,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:38:26,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:38:26,003 INFO L87 Difference]: Start difference. First operand 13613 states and 24816 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:27,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:38:27,189 INFO L93 Difference]: Finished difference Result 40034 states and 73045 transitions. [2021-11-02 22:38:27,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:38:27,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-02 22:38:27,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:38:27,262 INFO L225 Difference]: With dead ends: 40034 [2021-11-02 22:38:27,263 INFO L226 Difference]: Without dead ends: 26606 [2021-11-02 22:38:27,284 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:38:27,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26606 states. [2021-11-02 22:38:28,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26606 to 25743. [2021-11-02 22:38:28,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25743 states, 25737 states have (on average 1.8271360298403077) internal successors, (47025), 25742 states have internal predecessors, (47025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:28,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25743 states to 25743 states and 47025 transitions. [2021-11-02 22:38:28,368 INFO L78 Accepts]: Start accepts. Automaton has 25743 states and 47025 transitions. Word has length 82 [2021-11-02 22:38:28,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:38:28,368 INFO L470 AbstractCegarLoop]: Abstraction has 25743 states and 47025 transitions. [2021-11-02 22:38:28,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:28,369 INFO L276 IsEmpty]: Start isEmpty. Operand 25743 states and 47025 transitions. [2021-11-02 22:38:28,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-02 22:38:28,387 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:38:28,387 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:38:28,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 22:38:28,388 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-02 22:38:28,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:38:28,389 INFO L85 PathProgramCache]: Analyzing trace with hash 2070294642, now seen corresponding path program 1 times [2021-11-02 22:38:28,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:38:28,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261887810] [2021-11-02 22:38:28,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:28,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:38:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:28,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:38:28,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:38:28,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261887810] [2021-11-02 22:38:28,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261887810] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:38:28,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:38:28,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:38:28,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145928878] [2021-11-02 22:38:28,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:38:28,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:38:28,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:38:28,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:38:28,614 INFO L87 Difference]: Start difference. First operand 25743 states and 47025 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:30,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:38:30,647 INFO L93 Difference]: Finished difference Result 71063 states and 129408 transitions. [2021-11-02 22:38:30,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:38:30,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-02 22:38:30,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:38:30,789 INFO L225 Difference]: With dead ends: 71063 [2021-11-02 22:38:30,790 INFO L226 Difference]: Without dead ends: 45552 [2021-11-02 22:38:30,838 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:38:30,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45552 states. [2021-11-02 22:38:32,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45552 to 44689. [2021-11-02 22:38:32,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44689 states, 44683 states have (on average 1.817290692209565) internal successors, (81202), 44688 states have internal predecessors, (81202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:32,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44689 states to 44689 states and 81202 transitions. [2021-11-02 22:38:32,902 INFO L78 Accepts]: Start accepts. Automaton has 44689 states and 81202 transitions. Word has length 83 [2021-11-02 22:38:32,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:38:32,903 INFO L470 AbstractCegarLoop]: Abstraction has 44689 states and 81202 transitions. [2021-11-02 22:38:32,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:32,904 INFO L276 IsEmpty]: Start isEmpty. Operand 44689 states and 81202 transitions. [2021-11-02 22:38:32,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-02 22:38:32,934 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:38:32,935 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-02 22:38:32,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 22:38:32,939 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-02 22:38:32,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:38:32,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1509824725, now seen corresponding path program 1 times [2021-11-02 22:38:32,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:38:32,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077014160] [2021-11-02 22:38:32,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:32,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:38:32,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:33,043 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 22:38:33,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:38:33,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077014160] [2021-11-02 22:38:33,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077014160] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:38:33,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:38:33,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:38:33,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96391856] [2021-11-02 22:38:33,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:38:33,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:38:33,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:38:33,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:38:33,047 INFO L87 Difference]: Start difference. First operand 44689 states and 81202 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:36,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:38:36,487 INFO L93 Difference]: Finished difference Result 131676 states and 239241 transitions. [2021-11-02 22:38:36,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:38:36,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-02 22:38:36,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:38:36,682 INFO L225 Difference]: With dead ends: 131676 [2021-11-02 22:38:36,682 INFO L226 Difference]: Without dead ends: 87287 [2021-11-02 22:38:36,739 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:38:36,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87287 states. [2021-11-02 22:38:39,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87287 to 44689. [2021-11-02 22:38:39,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44689 states, 44683 states have (on average 1.8115166841975696) internal successors, (80944), 44688 states have internal predecessors, (80944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:39,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44689 states to 44689 states and 80944 transitions. [2021-11-02 22:38:39,136 INFO L78 Accepts]: Start accepts. Automaton has 44689 states and 80944 transitions. Word has length 84 [2021-11-02 22:38:39,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:38:39,136 INFO L470 AbstractCegarLoop]: Abstraction has 44689 states and 80944 transitions. [2021-11-02 22:38:39,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:39,137 INFO L276 IsEmpty]: Start isEmpty. Operand 44689 states and 80944 transitions. [2021-11-02 22:38:39,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-02 22:38:39,157 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:38:39,157 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:38:39,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 22:38:39,158 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-02 22:38:39,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:38:39,158 INFO L85 PathProgramCache]: Analyzing trace with hash -186645683, now seen corresponding path program 2 times [2021-11-02 22:38:39,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:38:39,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015761692] [2021-11-02 22:38:39,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:39,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:38:39,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:39,228 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:38:39,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:38:39,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015761692] [2021-11-02 22:38:39,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015761692] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:38:39,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:38:39,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:38:39,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113041861] [2021-11-02 22:38:39,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:38:39,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:38:39,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:38:39,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:38:39,232 INFO L87 Difference]: Start difference. First operand 44689 states and 80944 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:41,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:38:41,090 INFO L93 Difference]: Finished difference Result 89935 states and 162810 transitions. [2021-11-02 22:38:41,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:38:41,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-11-02 22:38:41,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:38:41,154 INFO L225 Difference]: With dead ends: 89935 [2021-11-02 22:38:41,154 INFO L226 Difference]: Without dead ends: 45552 [2021-11-02 22:38:41,178 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:38:41,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45552 states. [2021-11-02 22:38:42,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45552 to 44689. [2021-11-02 22:38:43,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44689 states, 44683 states have (on average 1.8086520600675873) internal successors, (80816), 44688 states have internal predecessors, (80816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:43,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44689 states to 44689 states and 80816 transitions. [2021-11-02 22:38:43,083 INFO L78 Accepts]: Start accepts. Automaton has 44689 states and 80816 transitions. Word has length 84 [2021-11-02 22:38:43,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:38:43,084 INFO L470 AbstractCegarLoop]: Abstraction has 44689 states and 80816 transitions. [2021-11-02 22:38:43,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:43,084 INFO L276 IsEmpty]: Start isEmpty. Operand 44689 states and 80816 transitions. [2021-11-02 22:38:43,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-02 22:38:43,097 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:38:43,098 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:38:43,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-02 22:38:43,098 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-02 22:38:43,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:38:43,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1707999616, now seen corresponding path program 1 times [2021-11-02 22:38:43,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:38:43,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675767306] [2021-11-02 22:38:43,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:43,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:38:43,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:43,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:38:43,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:38:43,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675767306] [2021-11-02 22:38:43,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675767306] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:38:43,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:38:43,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:38:43,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976829885] [2021-11-02 22:38:43,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:38:43,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:38:43,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:38:43,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:38:43,160 INFO L87 Difference]: Start difference. First operand 44689 states and 80816 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:45,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:38:45,925 INFO L93 Difference]: Finished difference Result 125561 states and 226884 transitions. [2021-11-02 22:38:45,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:38:45,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-11-02 22:38:45,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:38:46,084 INFO L225 Difference]: With dead ends: 125561 [2021-11-02 22:38:46,085 INFO L226 Difference]: Without dead ends: 81138 [2021-11-02 22:38:46,125 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:38:46,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81138 states. [2021-11-02 22:38:49,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81138 to 80275. [2021-11-02 22:38:49,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80275 states, 80269 states have (on average 1.804146058877026) internal successors, (144817), 80274 states have internal predecessors, (144817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:49,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80275 states to 80275 states and 144817 transitions. [2021-11-02 22:38:49,663 INFO L78 Accepts]: Start accepts. Automaton has 80275 states and 144817 transitions. Word has length 84 [2021-11-02 22:38:49,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:38:49,664 INFO L470 AbstractCegarLoop]: Abstraction has 80275 states and 144817 transitions. [2021-11-02 22:38:49,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:49,664 INFO L276 IsEmpty]: Start isEmpty. Operand 80275 states and 144817 transitions. [2021-11-02 22:38:49,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-02 22:38:49,680 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:38:49,681 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:38:49,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 22:38:49,681 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-02 22:38:49,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:38:49,682 INFO L85 PathProgramCache]: Analyzing trace with hash -500034489, now seen corresponding path program 1 times [2021-11-02 22:38:49,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:38:49,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195630647] [2021-11-02 22:38:49,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:49,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:38:49,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 22:38:49,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:38:49,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195630647] [2021-11-02 22:38:49,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195630647] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:38:49,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:38:49,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:38:49,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116642691] [2021-11-02 22:38:49,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:38:49,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:38:49,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:38:49,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:38:49,778 INFO L87 Difference]: Start difference. First operand 80275 states and 144817 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:38:55,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:38:55,675 INFO L93 Difference]: Finished difference Result 163458 states and 294456 transitions. [2021-11-02 22:38:55,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:38:55,681 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-02 22:38:55,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:38:56,003 INFO L225 Difference]: With dead ends: 163458 [2021-11-02 22:38:56,003 INFO L226 Difference]: Without dead ends: 162613 [2021-11-02 22:38:56,037 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:38:56,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162613 states. [2021-11-02 22:39:01,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162613 to 160226. [2021-11-02 22:39:02,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160226 states, 160220 states have (on average 1.8043689926351267) internal successors, (289096), 160225 states have internal predecessors, (289096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:02,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160226 states to 160226 states and 289096 transitions. [2021-11-02 22:39:02,883 INFO L78 Accepts]: Start accepts. Automaton has 160226 states and 289096 transitions. Word has length 85 [2021-11-02 22:39:02,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:39:02,883 INFO L470 AbstractCegarLoop]: Abstraction has 160226 states and 289096 transitions. [2021-11-02 22:39:02,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:39:02,884 INFO L276 IsEmpty]: Start isEmpty. Operand 160226 states and 289096 transitions. [2021-11-02 22:39:02,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-02 22:39:02,917 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:39:02,918 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-02 22:39:02,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-02 22:39:02,918 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-02 22:39:02,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:39:02,919 INFO L85 PathProgramCache]: Analyzing trace with hash -959724640, now seen corresponding path program 1 times [2021-11-02 22:39:02,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:39:02,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261377418] [2021-11-02 22:39:02,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:39:02,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:39:02,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:39:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 22:39:03,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:39:03,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261377418] [2021-11-02 22:39:03,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261377418] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:39:03,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:39:03,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:39:03,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603949314] [2021-11-02 22:39:03,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:39:03,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:39:03,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:39:03,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:39:03,027 INFO L87 Difference]: Start difference. First operand 160226 states and 289096 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)