./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec0_product37.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f3ec83-0d34-4517-9e09-987419caacc9/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f3ec83-0d34-4517-9e09-987419caacc9/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f3ec83-0d34-4517-9e09-987419caacc9/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f3ec83-0d34-4517-9e09-987419caacc9/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec0_product37.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f3ec83-0d34-4517-9e09-987419caacc9/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f3ec83-0d34-4517-9e09-987419caacc9/bin/uautomizer-AkOaLMaTGY --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 9dc54d5213c4407313cf4404e06f4e3ced3af047edaa52f6d33441570abdeda7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:34:18,328 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:34:18,330 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:34:18,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:34:18,380 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:34:18,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:34:18,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:34:18,391 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:34:18,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:34:18,400 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:34:18,401 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:34:18,403 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:34:18,404 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:34:18,406 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:34:18,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:34:18,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:34:18,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:34:18,418 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:34:18,420 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:34:18,423 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:34:18,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:34:18,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:34:18,431 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:34:18,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:34:18,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:34:18,443 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:34:18,444 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:34:18,446 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:34:18,446 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:34:18,448 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:34:18,449 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:34:18,450 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:34:18,451 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:34:18,452 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:34:18,454 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:34:18,454 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:34:18,455 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:34:18,455 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:34:18,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:34:18,456 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:34:18,457 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:34:18,458 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f3ec83-0d34-4517-9e09-987419caacc9/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:34:18,506 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:34:18,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:34:18,507 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:34:18,507 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:34:18,511 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:34:18,511 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:34:18,512 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:34:18,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:34:18,512 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:34:18,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:34:18,513 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:34:18,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:34:18,514 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:34:18,514 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:34:18,514 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:34:18,514 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:34:18,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:34:18,515 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:34:18,515 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:34:18,515 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:34:18,515 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:34:18,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:34:18,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:34:18,516 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:34:18,516 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:34:18,516 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:34:18,516 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:34:18,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:34:18,517 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:34:18,518 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:34:18,519 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:34:18,519 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:34:18,519 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_b4f3ec83-0d34-4517-9e09-987419caacc9/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f3ec83-0d34-4517-9e09-987419caacc9/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9dc54d5213c4407313cf4404e06f4e3ced3af047edaa52f6d33441570abdeda7 [2021-11-07 07:34:18,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:34:18,795 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:34:18,798 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:34:18,800 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:34:18,800 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:34:18,801 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f3ec83-0d34-4517-9e09-987419caacc9/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/product-lines/email_spec0_product37.cil.c [2021-11-07 07:34:18,898 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f3ec83-0d34-4517-9e09-987419caacc9/bin/uautomizer-AkOaLMaTGY/data/f2491652f/bcb99f57db314af2b8e46dbe1d8ca730/FLAGf3401d876 [2021-11-07 07:34:19,575 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:34:19,576 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f3ec83-0d34-4517-9e09-987419caacc9/sv-benchmarks/c/product-lines/email_spec0_product37.cil.c [2021-11-07 07:34:19,594 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f3ec83-0d34-4517-9e09-987419caacc9/bin/uautomizer-AkOaLMaTGY/data/f2491652f/bcb99f57db314af2b8e46dbe1d8ca730/FLAGf3401d876 [2021-11-07 07:34:19,783 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f3ec83-0d34-4517-9e09-987419caacc9/bin/uautomizer-AkOaLMaTGY/data/f2491652f/bcb99f57db314af2b8e46dbe1d8ca730 [2021-11-07 07:34:19,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:34:19,787 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:34:19,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:34:19,789 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:34:19,792 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:34:19,793 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:34:19" (1/1) ... [2021-11-07 07:34:19,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ac5e02c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:19, skipping insertion in model container [2021-11-07 07:34:19,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:34:19" (1/1) ... [2021-11-07 07:34:19,803 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:34:19,889 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:34:20,085 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_b4f3ec83-0d34-4517-9e09-987419caacc9/sv-benchmarks/c/product-lines/email_spec0_product37.cil.c[1542,1555] [2021-11-07 07:34:20,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:34:20,582 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:34:20,596 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_b4f3ec83-0d34-4517-9e09-987419caacc9/sv-benchmarks/c/product-lines/email_spec0_product37.cil.c[1542,1555] [2021-11-07 07:34:20,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:34:20,772 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:34:20,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:20 WrapperNode [2021-11-07 07:34:20,773 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:34:20,774 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:34:20,775 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:34:20,775 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:34:20,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:20" (1/1) ... [2021-11-07 07:34:20,840 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:20" (1/1) ... [2021-11-07 07:34:20,949 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:34:20,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:34:20,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:34:20,950 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:34:20,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:20" (1/1) ... [2021-11-07 07:34:20,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:20" (1/1) ... [2021-11-07 07:34:20,974 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:20" (1/1) ... [2021-11-07 07:34:20,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:20" (1/1) ... [2021-11-07 07:34:21,007 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:20" (1/1) ... [2021-11-07 07:34:21,023 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:20" (1/1) ... [2021-11-07 07:34:21,031 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:20" (1/1) ... [2021-11-07 07:34:21,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:34:21,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:34:21,055 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:34:21,056 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:34:21,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:20" (1/1) ... [2021-11-07 07:34:21,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:34:21,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f3ec83-0d34-4517-9e09-987419caacc9/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:34:21,136 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f3ec83-0d34-4517-9e09-987419caacc9/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:34:21,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f3ec83-0d34-4517-9e09-987419caacc9/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:34:21,189 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 07:34:21,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:34:21,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:34:21,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:34:21,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:34:23,137 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:34:23,137 INFO L299 CfgBuilder]: Removed 247 assume(true) statements. [2021-11-07 07:34:23,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:34:23 BoogieIcfgContainer [2021-11-07 07:34:23,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:34:23,143 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:34:23,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:34:23,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:34:23,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:34:19" (1/3) ... [2021-11-07 07:34:23,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17cf2702 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:34:23, skipping insertion in model container [2021-11-07 07:34:23,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:34:20" (2/3) ... [2021-11-07 07:34:23,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17cf2702 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:34:23, skipping insertion in model container [2021-11-07 07:34:23,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:34:23" (3/3) ... [2021-11-07 07:34:23,152 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec0_product37.cil.c [2021-11-07 07:34:23,158 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:34:23,158 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 07:34:23,233 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:34:23,242 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 [2021-11-07 07:34:23,242 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 07:34:23,274 INFO L276 IsEmpty]: Start isEmpty. Operand has 357 states, 354 states have (on average 1.7485875706214689) internal successors, (619), 356 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:23,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 07:34:23,286 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:23,287 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] [2021-11-07 07:34:23,287 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:23,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:23,293 INFO L85 PathProgramCache]: Analyzing trace with hash 2034469222, now seen corresponding path program 1 times [2021-11-07 07:34:23,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:23,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087305071] [2021-11-07 07:34:23,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:23,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:23,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:23,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:23,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:23,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087305071] [2021-11-07 07:34:23,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087305071] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:23,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:23,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:34:23,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947097718] [2021-11-07 07:34:23,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:34:23,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:23,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:34:23,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:34:23,760 INFO L87 Difference]: Start difference. First operand has 357 states, 354 states have (on average 1.7485875706214689) internal successors, (619), 356 states have internal predecessors, (619), 0 states have call successors, (0), 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 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:23,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:23,917 INFO L93 Difference]: Finished difference Result 1036 states and 1799 transitions. [2021-11-07 07:34:23,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:34:23,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2021-11-07 07:34:23,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:23,946 INFO L225 Difference]: With dead ends: 1036 [2021-11-07 07:34:23,947 INFO L226 Difference]: Without dead ends: 662 [2021-11-07 07:34:23,955 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 [2021-11-07 07:34:23,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-11-07 07:34:24,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 340. [2021-11-07 07:34:24,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 338 states have (on average 1.7337278106508875) internal successors, (586), 339 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:24,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 586 transitions. [2021-11-07 07:34:24,023 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 586 transitions. Word has length 44 [2021-11-07 07:34:24,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:24,024 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 586 transitions. [2021-11-07 07:34:24,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:24,024 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 586 transitions. [2021-11-07 07:34:24,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 07:34:24,028 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:24,029 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] [2021-11-07 07:34:24,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:34:24,029 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:24,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:24,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1845984583, now seen corresponding path program 1 times [2021-11-07 07:34:24,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:24,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753072772] [2021-11-07 07:34:24,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:24,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:24,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:24,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:24,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753072772] [2021-11-07 07:34:24,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753072772] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:24,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:24,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:34:24,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301817095] [2021-11-07 07:34:24,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:34:24,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:24,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:34:24,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:34:24,202 INFO L87 Difference]: Start difference. First operand 340 states and 586 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:24,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:24,379 INFO L93 Difference]: Finished difference Result 969 states and 1674 transitions. [2021-11-07 07:34:24,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:34:24,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2021-11-07 07:34:24,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:24,385 INFO L225 Difference]: With dead ends: 969 [2021-11-07 07:34:24,414 INFO L226 Difference]: Without dead ends: 648 [2021-11-07 07:34:24,416 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 [2021-11-07 07:34:24,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-11-07 07:34:24,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 340. [2021-11-07 07:34:24,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 338 states have (on average 1.7307692307692308) internal successors, (585), 339 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:24,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 585 transitions. [2021-11-07 07:34:24,467 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 585 transitions. Word has length 46 [2021-11-07 07:34:24,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:24,467 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 585 transitions. [2021-11-07 07:34:24,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:24,468 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 585 transitions. [2021-11-07 07:34:24,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 07:34:24,474 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:24,474 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] [2021-11-07 07:34:24,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 07:34:24,476 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:24,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:24,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1736859834, now seen corresponding path program 1 times [2021-11-07 07:34:24,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:24,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604600606] [2021-11-07 07:34:24,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:24,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:24,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:24,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604600606] [2021-11-07 07:34:24,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604600606] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:24,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:24,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:34:24,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636428165] [2021-11-07 07:34:24,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:34:24,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:24,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:34:24,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:34:24,651 INFO L87 Difference]: Start difference. First operand 340 states and 585 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:24,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:24,692 INFO L93 Difference]: Finished difference Result 662 states and 1144 transitions. [2021-11-07 07:34:24,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:34:24,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-07 07:34:24,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:24,697 INFO L225 Difference]: With dead ends: 662 [2021-11-07 07:34:24,697 INFO L226 Difference]: Without dead ends: 345 [2021-11-07 07:34:24,698 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 [2021-11-07 07:34:24,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-11-07 07:34:24,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 340. [2021-11-07 07:34:24,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 338 states have (on average 1.727810650887574) internal successors, (584), 339 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:24,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 584 transitions. [2021-11-07 07:34:24,718 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 584 transitions. Word has length 47 [2021-11-07 07:34:24,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:24,718 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 584 transitions. [2021-11-07 07:34:24,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:24,719 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 584 transitions. [2021-11-07 07:34:24,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 07:34:24,720 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:24,720 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] [2021-11-07 07:34:24,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 07:34:24,721 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:24,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:24,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1391455628, now seen corresponding path program 1 times [2021-11-07 07:34:24,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:24,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996389945] [2021-11-07 07:34:24,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:24,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:24,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:24,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:24,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996389945] [2021-11-07 07:34:24,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996389945] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:24,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:24,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:34:24,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075236587] [2021-11-07 07:34:24,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:34:24,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:24,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:34:24,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:34:24,842 INFO L87 Difference]: Start difference. First operand 340 states and 584 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:24,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:24,875 INFO L93 Difference]: Finished difference Result 672 states and 1157 transitions. [2021-11-07 07:34:24,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:34:24,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 07:34:24,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:24,879 INFO L225 Difference]: With dead ends: 672 [2021-11-07 07:34:24,879 INFO L226 Difference]: Without dead ends: 340 [2021-11-07 07:34:24,881 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 [2021-11-07 07:34:24,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-11-07 07:34:24,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2021-11-07 07:34:24,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 338 states have (on average 1.7218934911242603) internal successors, (582), 339 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:24,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 582 transitions. [2021-11-07 07:34:24,898 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 582 transitions. Word has length 48 [2021-11-07 07:34:24,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:24,898 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 582 transitions. [2021-11-07 07:34:24,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:24,899 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 582 transitions. [2021-11-07 07:34:24,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 07:34:24,900 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:24,901 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] [2021-11-07 07:34:24,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 07:34:24,901 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:24,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:24,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1875597471, now seen corresponding path program 1 times [2021-11-07 07:34:24,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:24,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392298907] [2021-11-07 07:34:24,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:24,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:24,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:25,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:25,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:25,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392298907] [2021-11-07 07:34:25,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392298907] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:25,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:25,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:34:25,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661352163] [2021-11-07 07:34:25,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:34:25,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:25,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:34:25,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:34:25,035 INFO L87 Difference]: Start difference. First operand 340 states and 582 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:25,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:25,187 INFO L93 Difference]: Finished difference Result 959 states and 1654 transitions. [2021-11-07 07:34:25,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:34:25,188 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 07:34:25,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:25,194 INFO L225 Difference]: With dead ends: 959 [2021-11-07 07:34:25,194 INFO L226 Difference]: Without dead ends: 646 [2021-11-07 07:34:25,195 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 [2021-11-07 07:34:25,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-11-07 07:34:25,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 340. [2021-11-07 07:34:25,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 338 states have (on average 1.7189349112426036) internal successors, (581), 339 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:25,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 581 transitions. [2021-11-07 07:34:25,221 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 581 transitions. Word has length 49 [2021-11-07 07:34:25,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:25,222 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 581 transitions. [2021-11-07 07:34:25,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:25,222 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 581 transitions. [2021-11-07 07:34:25,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 07:34:25,224 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:25,224 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] [2021-11-07 07:34:25,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 07:34:25,225 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:25,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:25,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1662750012, now seen corresponding path program 1 times [2021-11-07 07:34:25,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:25,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681411897] [2021-11-07 07:34:25,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:25,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:25,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:25,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:25,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:25,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681411897] [2021-11-07 07:34:25,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681411897] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:25,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:25,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:34:25,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015597003] [2021-11-07 07:34:25,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:34:25,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:25,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:34:25,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:34:25,337 INFO L87 Difference]: Start difference. First operand 340 states and 581 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:25,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:25,518 INFO L93 Difference]: Finished difference Result 964 states and 1659 transitions. [2021-11-07 07:34:25,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:34:25,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-07 07:34:25,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:25,526 INFO L225 Difference]: With dead ends: 964 [2021-11-07 07:34:25,526 INFO L226 Difference]: Without dead ends: 651 [2021-11-07 07:34:25,527 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 [2021-11-07 07:34:25,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-11-07 07:34:25,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 340. [2021-11-07 07:34:25,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 338 states have (on average 1.7159763313609468) internal successors, (580), 339 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:25,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 580 transitions. [2021-11-07 07:34:25,551 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 580 transitions. Word has length 50 [2021-11-07 07:34:25,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:25,552 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 580 transitions. [2021-11-07 07:34:25,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:25,552 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 580 transitions. [2021-11-07 07:34:25,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 07:34:25,553 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:25,553 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] [2021-11-07 07:34:25,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 07:34:25,554 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:25,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:25,554 INFO L85 PathProgramCache]: Analyzing trace with hash 697134556, now seen corresponding path program 1 times [2021-11-07 07:34:25,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:25,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594720905] [2021-11-07 07:34:25,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:25,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:25,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:25,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:25,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:25,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594720905] [2021-11-07 07:34:25,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594720905] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:25,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:25,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:34:25,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163981263] [2021-11-07 07:34:25,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:34:25,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:25,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:34:25,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:34:25,649 INFO L87 Difference]: Start difference. First operand 340 states and 580 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:25,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:25,675 INFO L93 Difference]: Finished difference Result 438 states and 729 transitions. [2021-11-07 07:34:25,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:34:25,676 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 07:34:25,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:25,679 INFO L225 Difference]: With dead ends: 438 [2021-11-07 07:34:25,679 INFO L226 Difference]: Without dead ends: 343 [2021-11-07 07:34:25,680 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 [2021-11-07 07:34:25,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-11-07 07:34:25,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 342. [2021-11-07 07:34:25,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 340 states have (on average 1.7117647058823529) internal successors, (582), 341 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:25,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 582 transitions. [2021-11-07 07:34:25,702 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 582 transitions. Word has length 51 [2021-11-07 07:34:25,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:25,702 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 582 transitions. [2021-11-07 07:34:25,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:25,703 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 582 transitions. [2021-11-07 07:34:25,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 07:34:25,704 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:25,704 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] [2021-11-07 07:34:25,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 07:34:25,704 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:25,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:25,705 INFO L85 PathProgramCache]: Analyzing trace with hash -421271606, now seen corresponding path program 1 times [2021-11-07 07:34:25,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:25,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513660256] [2021-11-07 07:34:25,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:25,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:25,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:25,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:25,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:25,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513660256] [2021-11-07 07:34:25,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513660256] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:25,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:25,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:34:25,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146824082] [2021-11-07 07:34:25,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:34:25,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:25,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:34:25,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:34:25,804 INFO L87 Difference]: Start difference. First operand 342 states and 582 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:25,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:25,859 INFO L93 Difference]: Finished difference Result 912 states and 1570 transitions. [2021-11-07 07:34:25,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:34:25,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 07:34:25,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:25,865 INFO L225 Difference]: With dead ends: 912 [2021-11-07 07:34:25,865 INFO L226 Difference]: Without dead ends: 601 [2021-11-07 07:34:25,867 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 [2021-11-07 07:34:25,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-11-07 07:34:25,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 506. [2021-11-07 07:34:25,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 504 states have (on average 1.75) internal successors, (882), 505 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:25,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 882 transitions. [2021-11-07 07:34:25,901 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 882 transitions. Word has length 59 [2021-11-07 07:34:25,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:25,902 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 882 transitions. [2021-11-07 07:34:25,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:25,903 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 882 transitions. [2021-11-07 07:34:25,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 07:34:25,904 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:25,904 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] [2021-11-07 07:34:25,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 07:34:25,905 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:25,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:25,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1683409705, now seen corresponding path program 1 times [2021-11-07 07:34:25,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:25,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835936789] [2021-11-07 07:34:25,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:25,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:25,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:25,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:25,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:25,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835936789] [2021-11-07 07:34:25,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835936789] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:25,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:25,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:34:25,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893902223] [2021-11-07 07:34:25,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:34:25,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:25,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:34:25,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:34:25,998 INFO L87 Difference]: Start difference. First operand 506 states and 882 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 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) [2021-11-07 07:34:26,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:26,261 INFO L93 Difference]: Finished difference Result 1448 states and 2552 transitions. [2021-11-07 07:34:26,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:34:26,262 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 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 [2021-11-07 07:34:26,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:26,268 INFO L225 Difference]: With dead ends: 1448 [2021-11-07 07:34:26,269 INFO L226 Difference]: Without dead ends: 973 [2021-11-07 07:34:26,270 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 [2021-11-07 07:34:26,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-11-07 07:34:26,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 506. [2021-11-07 07:34:26,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 504 states have (on average 1.746031746031746) internal successors, (880), 505 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:26,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 880 transitions. [2021-11-07 07:34:26,334 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 880 transitions. Word has length 60 [2021-11-07 07:34:26,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:26,334 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 880 transitions. [2021-11-07 07:34:26,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 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) [2021-11-07 07:34:26,335 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 880 transitions. [2021-11-07 07:34:26,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 07:34:26,336 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:26,336 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] [2021-11-07 07:34:26,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 07:34:26,337 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:26,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:26,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1539082368, now seen corresponding path program 1 times [2021-11-07 07:34:26,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:26,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479505931] [2021-11-07 07:34:26,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:26,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:26,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:26,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479505931] [2021-11-07 07:34:26,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479505931] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:26,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:26,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:34:26,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85475082] [2021-11-07 07:34:26,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:34:26,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:26,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:34:26,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:34:26,390 INFO L87 Difference]: Start difference. First operand 506 states and 880 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:26,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:26,460 INFO L93 Difference]: Finished difference Result 1446 states and 2544 transitions. [2021-11-07 07:34:26,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:34:26,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 07:34:26,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:26,467 INFO L225 Difference]: With dead ends: 1446 [2021-11-07 07:34:26,467 INFO L226 Difference]: Without dead ends: 971 [2021-11-07 07:34:26,468 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 [2021-11-07 07:34:26,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-11-07 07:34:26,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 876. [2021-11-07 07:34:26,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 874 states have (on average 1.7814645308924486) internal successors, (1557), 875 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:26,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1557 transitions. [2021-11-07 07:34:26,534 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1557 transitions. Word has length 61 [2021-11-07 07:34:26,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:26,534 INFO L470 AbstractCegarLoop]: Abstraction has 876 states and 1557 transitions. [2021-11-07 07:34:26,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:26,535 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1557 transitions. [2021-11-07 07:34:26,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 07:34:26,537 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:26,537 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] [2021-11-07 07:34:26,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 07:34:26,537 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:26,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:26,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1211718942, now seen corresponding path program 1 times [2021-11-07 07:34:26,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:26,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052159129] [2021-11-07 07:34:26,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:26,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:26,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:26,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:26,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052159129] [2021-11-07 07:34:26,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052159129] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:26,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799360485] [2021-11-07 07:34:26,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:26,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:26,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f3ec83-0d34-4517-9e09-987419caacc9/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:34:26,623 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f3ec83-0d34-4517-9e09-987419caacc9/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:34:26,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f3ec83-0d34-4517-9e09-987419caacc9/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:34:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:26,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:34:26,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:34:27,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:27,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799360485] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:27,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:34:27,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-07 07:34:27,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026860718] [2021-11-07 07:34:27,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:34:27,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:27,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:34:27,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:34:27,184 INFO L87 Difference]: Start difference. First operand 876 states and 1557 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:27,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:27,298 INFO L93 Difference]: Finished difference Result 1289 states and 2250 transitions. [2021-11-07 07:34:27,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:34:27,299 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 07:34:27,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:27,307 INFO L225 Difference]: With dead ends: 1289 [2021-11-07 07:34:27,308 INFO L226 Difference]: Without dead ends: 1194 [2021-11-07 07:34:27,309 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:34:27,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-11-07 07:34:27,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1096. [2021-11-07 07:34:27,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1094 states have (on average 1.7861060329067642) internal successors, (1954), 1095 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:27,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1954 transitions. [2021-11-07 07:34:27,403 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1954 transitions. Word has length 61 [2021-11-07 07:34:27,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:27,403 INFO L470 AbstractCegarLoop]: Abstraction has 1096 states and 1954 transitions. [2021-11-07 07:34:27,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:27,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1954 transitions. [2021-11-07 07:34:27,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 07:34:27,437 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:27,437 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] [2021-11-07 07:34:27,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f3ec83-0d34-4517-9e09-987419caacc9/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:34:27,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4f3ec83-0d34-4517-9e09-987419caacc9/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-07 07:34:27,659 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:27,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:27,660 INFO L85 PathProgramCache]: Analyzing trace with hash 277696251, now seen corresponding path program 1 times [2021-11-07 07:34:27,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:27,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561384777] [2021-11-07 07:34:27,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:27,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:27,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:27,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:27,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:27,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561384777] [2021-11-07 07:34:27,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561384777] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:27,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:27,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:34:27,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156194295] [2021-11-07 07:34:27,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:34:27,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:27,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:34:27,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:34:27,733 INFO L87 Difference]: Start difference. First operand 1096 states and 1954 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:27,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:27,850 INFO L93 Difference]: Finished difference Result 2918 states and 5229 transitions. [2021-11-07 07:34:27,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:34:27,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 07:34:27,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:27,862 INFO L225 Difference]: With dead ends: 2918 [2021-11-07 07:34:27,862 INFO L226 Difference]: Without dead ends: 1923 [2021-11-07 07:34:27,867 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 [2021-11-07 07:34:27,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2021-11-07 07:34:28,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1828. [2021-11-07 07:34:28,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1826 states have (on average 1.8001095290251916) internal successors, (3287), 1827 states have internal predecessors, (3287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:28,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 3287 transitions. [2021-11-07 07:34:28,012 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 3287 transitions. Word has length 65 [2021-11-07 07:34:28,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:28,013 INFO L470 AbstractCegarLoop]: Abstraction has 1828 states and 3287 transitions. [2021-11-07 07:34:28,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:28,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 3287 transitions. [2021-11-07 07:34:28,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 07:34:28,017 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:28,017 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] [2021-11-07 07:34:28,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 07:34:28,017 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:28,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:28,018 INFO L85 PathProgramCache]: Analyzing trace with hash -929846149, now seen corresponding path program 1 times [2021-11-07 07:34:28,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:28,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913476561] [2021-11-07 07:34:28,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:28,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:28,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:28,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:28,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913476561] [2021-11-07 07:34:28,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913476561] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:28,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:28,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:34:28,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27245272] [2021-11-07 07:34:28,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:34:28,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:28,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:34:28,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:34:28,076 INFO L87 Difference]: Start difference. First operand 1828 states and 3287 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:28,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:28,254 INFO L93 Difference]: Finished difference Result 4850 states and 8747 transitions. [2021-11-07 07:34:28,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:34:28,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-11-07 07:34:28,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:28,275 INFO L225 Difference]: With dead ends: 4850 [2021-11-07 07:34:28,275 INFO L226 Difference]: Without dead ends: 3157 [2021-11-07 07:34:28,279 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 [2021-11-07 07:34:28,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2021-11-07 07:34:28,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 3062. [2021-11-07 07:34:28,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3062 states, 3060 states have (on average 1.8065359477124183) internal successors, (5528), 3061 states have internal predecessors, (5528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:28,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3062 states to 3062 states and 5528 transitions. [2021-11-07 07:34:28,487 INFO L78 Accepts]: Start accepts. Automaton has 3062 states and 5528 transitions. Word has length 66 [2021-11-07 07:34:28,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:28,487 INFO L470 AbstractCegarLoop]: Abstraction has 3062 states and 5528 transitions. [2021-11-07 07:34:28,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:28,488 INFO L276 IsEmpty]: Start isEmpty. Operand 3062 states and 5528 transitions. [2021-11-07 07:34:28,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 07:34:28,492 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:28,492 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] [2021-11-07 07:34:28,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 07:34:28,493 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:28,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:28,493 INFO L85 PathProgramCache]: Analyzing trace with hash 478961964, now seen corresponding path program 1 times [2021-11-07 07:34:28,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:28,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547492751] [2021-11-07 07:34:28,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:28,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:28,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:28,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:28,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:28,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547492751] [2021-11-07 07:34:28,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547492751] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:28,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:28,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:34:28,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527981655] [2021-11-07 07:34:28,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:34:28,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:28,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:34:28,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:34:28,549 INFO L87 Difference]: Start difference. First operand 3062 states and 5528 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:28,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:28,887 INFO L93 Difference]: Finished difference Result 8268 states and 14953 transitions. [2021-11-07 07:34:28,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:34:28,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-11-07 07:34:28,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:28,921 INFO L225 Difference]: With dead ends: 8268 [2021-11-07 07:34:28,921 INFO L226 Difference]: Without dead ends: 5375 [2021-11-07 07:34:28,927 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 [2021-11-07 07:34:28,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5375 states. [2021-11-07 07:34:29,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5375 to 5280. [2021-11-07 07:34:29,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5280 states, 5278 states have (on average 1.808450170519136) internal successors, (9545), 5279 states have internal predecessors, (9545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:29,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5280 states to 5280 states and 9545 transitions. [2021-11-07 07:34:29,352 INFO L78 Accepts]: Start accepts. Automaton has 5280 states and 9545 transitions. Word has length 67 [2021-11-07 07:34:29,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:29,352 INFO L470 AbstractCegarLoop]: Abstraction has 5280 states and 9545 transitions. [2021-11-07 07:34:29,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:29,353 INFO L276 IsEmpty]: Start isEmpty. Operand 5280 states and 9545 transitions. [2021-11-07 07:34:29,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 07:34:29,358 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:29,358 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] [2021-11-07 07:34:29,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 07:34:29,359 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:29,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:29,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1476665972, now seen corresponding path program 1 times [2021-11-07 07:34:29,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:29,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671707548] [2021-11-07 07:34:29,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:29,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:29,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:29,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:29,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:29,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671707548] [2021-11-07 07:34:29,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671707548] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:29,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:29,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:34:29,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625900466] [2021-11-07 07:34:29,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:34:29,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:29,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:34:29,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:34:29,421 INFO L87 Difference]: Start difference. First operand 5280 states and 9545 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:30,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:30,121 INFO L93 Difference]: Finished difference Result 15248 states and 27615 transitions. [2021-11-07 07:34:30,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:34:30,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-07 07:34:30,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:30,179 INFO L225 Difference]: With dead ends: 15248 [2021-11-07 07:34:30,179 INFO L226 Difference]: Without dead ends: 10145 [2021-11-07 07:34:30,188 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 [2021-11-07 07:34:30,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10145 states. [2021-11-07 07:34:30,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10145 to 10050. [2021-11-07 07:34:30,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10050 states, 10048 states have (on average 1.8099124203821657) internal successors, (18186), 10049 states have internal predecessors, (18186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:30,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10050 states to 10050 states and 18186 transitions. [2021-11-07 07:34:30,939 INFO L78 Accepts]: Start accepts. Automaton has 10050 states and 18186 transitions. Word has length 68 [2021-11-07 07:34:30,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:30,939 INFO L470 AbstractCegarLoop]: Abstraction has 10050 states and 18186 transitions. [2021-11-07 07:34:30,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:30,940 INFO L276 IsEmpty]: Start isEmpty. Operand 10050 states and 18186 transitions. [2021-11-07 07:34:30,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 07:34:30,949 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:30,950 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] [2021-11-07 07:34:30,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 07:34:30,950 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:30,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:30,951 INFO L85 PathProgramCache]: Analyzing trace with hash 990031899, now seen corresponding path program 1 times [2021-11-07 07:34:30,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:30,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296965960] [2021-11-07 07:34:30,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:30,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:30,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:31,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:31,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:31,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296965960] [2021-11-07 07:34:31,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296965960] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:31,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:31,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:34:31,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441147578] [2021-11-07 07:34:31,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:34:31,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:31,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:34:31,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:34:31,016 INFO L87 Difference]: Start difference. First operand 10050 states and 18186 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:31,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:31,973 INFO L93 Difference]: Finished difference Result 29388 states and 53237 transitions. [2021-11-07 07:34:31,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:34:31,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-07 07:34:31,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:32,029 INFO L225 Difference]: With dead ends: 29388 [2021-11-07 07:34:32,030 INFO L226 Difference]: Without dead ends: 19523 [2021-11-07 07:34:32,044 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 [2021-11-07 07:34:32,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19523 states. [2021-11-07 07:34:33,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19523 to 19428. [2021-11-07 07:34:33,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19428 states, 19426 states have (on average 1.809276227736024) internal successors, (35147), 19427 states have internal predecessors, (35147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:33,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19428 states to 19428 states and 35147 transitions. [2021-11-07 07:34:33,234 INFO L78 Accepts]: Start accepts. Automaton has 19428 states and 35147 transitions. Word has length 69 [2021-11-07 07:34:33,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:33,235 INFO L470 AbstractCegarLoop]: Abstraction has 19428 states and 35147 transitions. [2021-11-07 07:34:33,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:33,235 INFO L276 IsEmpty]: Start isEmpty. Operand 19428 states and 35147 transitions. [2021-11-07 07:34:33,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 07:34:33,245 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:33,245 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] [2021-11-07 07:34:33,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 07:34:33,246 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:33,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:33,247 INFO L85 PathProgramCache]: Analyzing trace with hash -163290405, now seen corresponding path program 1 times [2021-11-07 07:34:33,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:33,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131994781] [2021-11-07 07:34:33,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:33,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:33,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:33,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:33,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:33,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131994781] [2021-11-07 07:34:33,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131994781] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:33,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:33,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:34:33,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843528564] [2021-11-07 07:34:33,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:34:33,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:33,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:34:33,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:34:33,320 INFO L87 Difference]: Start difference. First operand 19428 states and 35147 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:34,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:34,924 INFO L93 Difference]: Finished difference Result 57708 states and 104434 transitions. [2021-11-07 07:34:34,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:34:34,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2021-11-07 07:34:34,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:35,051 INFO L225 Difference]: With dead ends: 57708 [2021-11-07 07:34:35,051 INFO L226 Difference]: Without dead ends: 38469 [2021-11-07 07:34:35,081 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 [2021-11-07 07:34:35,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38469 states. [2021-11-07 07:34:36,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38469 to 38374. [2021-11-07 07:34:36,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38374 states, 38372 states have (on average 1.8066298342541436) internal successors, (69324), 38373 states have internal predecessors, (69324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:37,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38374 states to 38374 states and 69324 transitions. [2021-11-07 07:34:37,267 INFO L78 Accepts]: Start accepts. Automaton has 38374 states and 69324 transitions. Word has length 70 [2021-11-07 07:34:37,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:37,267 INFO L470 AbstractCegarLoop]: Abstraction has 38374 states and 69324 transitions. [2021-11-07 07:34:37,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:37,268 INFO L276 IsEmpty]: Start isEmpty. Operand 38374 states and 69324 transitions. [2021-11-07 07:34:37,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 07:34:37,288 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:37,288 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] [2021-11-07 07:34:37,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 07:34:37,289 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:37,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:37,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1182780738, now seen corresponding path program 1 times [2021-11-07 07:34:37,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:37,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704385518] [2021-11-07 07:34:37,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:37,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:37,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:37,373 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 07:34:37,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:37,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704385518] [2021-11-07 07:34:37,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704385518] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:37,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:37,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:34:37,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925865350] [2021-11-07 07:34:37,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:34:37,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:37,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:34:37,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:34:37,378 INFO L87 Difference]: Start difference. First operand 38374 states and 69324 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:40,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:40,216 INFO L93 Difference]: Finished difference Result 112817 states and 203771 transitions. [2021-11-07 07:34:40,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:34:40,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 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 71 [2021-11-07 07:34:40,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:40,500 INFO L225 Difference]: With dead ends: 112817 [2021-11-07 07:34:40,500 INFO L226 Difference]: Without dead ends: 74700 [2021-11-07 07:34:40,573 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 [2021-11-07 07:34:40,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74700 states. [2021-11-07 07:34:42,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74700 to 38374. [2021-11-07 07:34:42,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38374 states, 38372 states have (on average 1.7999061815907433) internal successors, (69066), 38373 states have internal predecessors, (69066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:42,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38374 states to 38374 states and 69066 transitions. [2021-11-07 07:34:42,984 INFO L78 Accepts]: Start accepts. Automaton has 38374 states and 69066 transitions. Word has length 71 [2021-11-07 07:34:42,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:42,984 INFO L470 AbstractCegarLoop]: Abstraction has 38374 states and 69066 transitions. [2021-11-07 07:34:42,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:42,985 INFO L276 IsEmpty]: Start isEmpty. Operand 38374 states and 69066 transitions. [2021-11-07 07:34:42,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 07:34:42,995 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:42,995 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] [2021-11-07 07:34:42,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 07:34:42,995 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:42,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:42,996 INFO L85 PathProgramCache]: Analyzing trace with hash 855417312, now seen corresponding path program 2 times [2021-11-07 07:34:42,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:42,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815747293] [2021-11-07 07:34:42,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:42,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:43,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:43,067 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:43,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:43,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815747293] [2021-11-07 07:34:43,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815747293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:43,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:43,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:34:43,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138899756] [2021-11-07 07:34:43,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:34:43,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:43,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:34:43,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:34:43,071 INFO L87 Difference]: Start difference. First operand 38374 states and 69066 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:44,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:44,869 INFO L93 Difference]: Finished difference Result 76580 states and 137836 transitions. [2021-11-07 07:34:44,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:34:44,871 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-11-07 07:34:44,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:44,951 INFO L225 Difference]: With dead ends: 76580 [2021-11-07 07:34:44,952 INFO L226 Difference]: Without dead ends: 38469 [2021-11-07 07:34:44,991 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:34:45,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38469 states. [2021-11-07 07:34:46,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38469 to 38374. [2021-11-07 07:34:46,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38374 states, 38372 states have (on average 1.796570415928281) internal successors, (68938), 38373 states have internal predecessors, (68938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:46,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38374 states to 38374 states and 68938 transitions. [2021-11-07 07:34:46,971 INFO L78 Accepts]: Start accepts. Automaton has 38374 states and 68938 transitions. Word has length 71 [2021-11-07 07:34:46,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:46,972 INFO L470 AbstractCegarLoop]: Abstraction has 38374 states and 68938 transitions. [2021-11-07 07:34:46,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:46,972 INFO L276 IsEmpty]: Start isEmpty. Operand 38374 states and 68938 transitions. [2021-11-07 07:34:46,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 07:34:46,981 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:46,982 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] [2021-11-07 07:34:46,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 07:34:46,982 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:46,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:46,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1970795277, now seen corresponding path program 1 times [2021-11-07 07:34:46,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:46,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41234136] [2021-11-07 07:34:46,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:46,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:47,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:47,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:47,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41234136] [2021-11-07 07:34:47,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41234136] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:47,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:47,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:34:47,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672094114] [2021-11-07 07:34:47,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:34:47,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:47,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:34:47,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:34:47,043 INFO L87 Difference]: Start difference. First operand 38374 states and 68938 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:49,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:49,797 INFO L93 Difference]: Finished difference Result 106702 states and 191414 transitions. [2021-11-07 07:34:49,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:34:49,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-11-07 07:34:49,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:49,925 INFO L225 Difference]: With dead ends: 106702 [2021-11-07 07:34:49,925 INFO L226 Difference]: Without dead ends: 68551 [2021-11-07 07:34:49,954 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 [2021-11-07 07:34:50,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68551 states. [2021-11-07 07:34:53,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68551 to 68456. [2021-11-07 07:34:53,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68456 states, 68454 states have (on average 1.788690215327081) internal successors, (122443), 68455 states have internal predecessors, (122443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:53,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68456 states to 68456 states and 122443 transitions. [2021-11-07 07:34:53,309 INFO L78 Accepts]: Start accepts. Automaton has 68456 states and 122443 transitions. Word has length 71 [2021-11-07 07:34:53,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:53,310 INFO L470 AbstractCegarLoop]: Abstraction has 68456 states and 122443 transitions. [2021-11-07 07:34:53,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:53,310 INFO L276 IsEmpty]: Start isEmpty. Operand 68456 states and 122443 transitions. [2021-11-07 07:34:53,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 07:34:53,322 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:53,323 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] [2021-11-07 07:34:53,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 07:34:53,323 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:53,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:53,324 INFO L85 PathProgramCache]: Analyzing trace with hash -729775450, now seen corresponding path program 1 times [2021-11-07 07:34:53,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:53,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68629780] [2021-11-07 07:34:53,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:53,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:53,457 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 07:34:53,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:53,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68629780] [2021-11-07 07:34:53,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68629780] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:34:53,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:34:53,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-07 07:34:53,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891260547] [2021-11-07 07:34:53,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 07:34:53,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:53,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 07:34:53,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:34:53,461 INFO L87 Difference]: Start difference. First operand 68456 states and 122443 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:57,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:57,246 INFO L93 Difference]: Finished difference Result 69079 states and 123351 transitions. [2021-11-07 07:34:57,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 07:34:57,247 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 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 [2021-11-07 07:34:57,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:57,365 INFO L225 Difference]: With dead ends: 69079 [2021-11-07 07:34:57,365 INFO L226 Difference]: Without dead ends: 69006 [2021-11-07 07:34:57,379 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=290, Invalid=766, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 07:34:57,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69006 states. [2021-11-07 07:35:00,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69006 to 68499. [2021-11-07 07:35:00,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68499 states, 68497 states have (on average 1.788472487846183) internal successors, (122505), 68498 states have internal predecessors, (122505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:01,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68499 states to 68499 states and 122505 transitions. [2021-11-07 07:35:01,007 INFO L78 Accepts]: Start accepts. Automaton has 68499 states and 122505 transitions. Word has length 72 [2021-11-07 07:35:01,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:35:01,007 INFO L470 AbstractCegarLoop]: Abstraction has 68499 states and 122505 transitions. [2021-11-07 07:35:01,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:01,008 INFO L276 IsEmpty]: Start isEmpty. Operand 68499 states and 122505 transitions. [2021-11-07 07:35:01,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 07:35:01,017 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:35:01,017 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] [2021-11-07 07:35:01,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 07:35:01,018 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:35:01,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:35:01,019 INFO L85 PathProgramCache]: Analyzing trace with hash -899185413, now seen corresponding path program 1 times [2021-11-07 07:35:01,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:35:01,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386252425] [2021-11-07 07:35:01,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:35:01,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:35:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:35:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 07:35:01,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:35:01,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386252425] [2021-11-07 07:35:01,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386252425] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:35:01,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:35:01,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 07:35:01,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505880474] [2021-11-07 07:35:01,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 07:35:01,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:35:01,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 07:35:01,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:35:01,116 INFO L87 Difference]: Start difference. First operand 68499 states and 122505 transitions. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 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) [2021-11-07 07:35:05,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:35:05,536 INFO L93 Difference]: Finished difference Result 103111 states and 184059 transitions. [2021-11-07 07:35:05,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 07:35:05,536 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 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 73 [2021-11-07 07:35:05,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:35:05,730 INFO L225 Difference]: With dead ends: 103111 [2021-11-07 07:35:05,730 INFO L226 Difference]: Without dead ends: 103015 [2021-11-07 07:35:05,751 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2021-11-07 07:35:05,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103015 states.