./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec7_product18.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_7c467f24-13ce-4769-8934-d3280a6d8703/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c467f24-13ce-4769-8934-d3280a6d8703/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_7c467f24-13ce-4769-8934-d3280a6d8703/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c467f24-13ce-4769-8934-d3280a6d8703/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec7_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c467f24-13ce-4769-8934-d3280a6d8703/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_7c467f24-13ce-4769-8934-d3280a6d8703/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 f70ac21a1decd51d5f9571a5be4450629a9ca28f5aa1158e9564f33ba44bf6ef --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:25:31,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:25:31,664 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:25:31,713 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:25:31,713 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:25:31,717 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:25:31,719 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:25:31,722 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:25:31,725 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:25:31,730 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:25:31,731 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:25:31,733 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:25:31,733 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:25:31,736 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:25:31,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:25:31,746 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:25:31,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:25:31,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:25:31,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:25:31,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:25:31,759 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:25:31,761 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:25:31,764 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:25:31,765 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:25:31,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:25:31,774 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:25:31,774 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:25:31,776 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:25:31,777 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:25:31,778 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:25:31,779 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:25:31,780 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:25:31,782 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:25:31,783 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:25:31,785 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:25:31,785 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:25:31,785 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:25:31,786 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:25:31,786 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:25:31,787 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:25:31,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:25:31,788 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c467f24-13ce-4769-8934-d3280a6d8703/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:25:31,840 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:25:31,840 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:25:31,841 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:25:31,841 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:25:31,848 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:25:31,848 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:25:31,849 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:25:31,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:25:31,849 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:25:31,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:25:31,849 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:25:31,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:25:31,850 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:25:31,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:25:31,850 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:25:31,850 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:25:31,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:25:31,851 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:25:31,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:25:31,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:25:31,851 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:25:31,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:25:31,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:25:31,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:25:31,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:25:31,853 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:25:31,853 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:25:31,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:25:31,853 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:25:31,853 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:25:31,854 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:25:31,854 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:25:31,854 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_7c467f24-13ce-4769-8934-d3280a6d8703/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c467f24-13ce-4769-8934-d3280a6d8703/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f70ac21a1decd51d5f9571a5be4450629a9ca28f5aa1158e9564f33ba44bf6ef [2021-11-07 08:25:32,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:25:32,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:25:32,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:25:32,131 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:25:32,131 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:25:32,132 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c467f24-13ce-4769-8934-d3280a6d8703/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/product-lines/email_spec7_product18.cil.c [2021-11-07 08:25:32,225 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c467f24-13ce-4769-8934-d3280a6d8703/bin/uautomizer-AkOaLMaTGY/data/7602e8d16/b760687263054975a4925092093a22ca/FLAG91e68f8d5 [2021-11-07 08:25:32,823 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:25:32,823 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c467f24-13ce-4769-8934-d3280a6d8703/sv-benchmarks/c/product-lines/email_spec7_product18.cil.c [2021-11-07 08:25:32,851 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c467f24-13ce-4769-8934-d3280a6d8703/bin/uautomizer-AkOaLMaTGY/data/7602e8d16/b760687263054975a4925092093a22ca/FLAG91e68f8d5 [2021-11-07 08:25:33,034 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c467f24-13ce-4769-8934-d3280a6d8703/bin/uautomizer-AkOaLMaTGY/data/7602e8d16/b760687263054975a4925092093a22ca [2021-11-07 08:25:33,036 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:25:33,038 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:25:33,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:25:33,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:25:33,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:25:33,045 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:25:33" (1/1) ... [2021-11-07 08:25:33,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d31089a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:33, skipping insertion in model container [2021-11-07 08:25:33,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:25:33" (1/1) ... [2021-11-07 08:25:33,054 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:25:33,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:25:33,677 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_7c467f24-13ce-4769-8934-d3280a6d8703/sv-benchmarks/c/product-lines/email_spec7_product18.cil.c[45803,45816] [2021-11-07 08:25:33,779 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:25:33,790 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:25:33,862 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_7c467f24-13ce-4769-8934-d3280a6d8703/sv-benchmarks/c/product-lines/email_spec7_product18.cil.c[45803,45816] [2021-11-07 08:25:33,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:25:33,949 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:25:33,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:33 WrapperNode [2021-11-07 08:25:33,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:25:33,952 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:25:33,952 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:25:33,952 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:25:33,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:33" (1/1) ... [2021-11-07 08:25:34,012 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:33" (1/1) ... [2021-11-07 08:25:34,125 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:25:34,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:25:34,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:25:34,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:25:34,134 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:33" (1/1) ... [2021-11-07 08:25:34,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:33" (1/1) ... [2021-11-07 08:25:34,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:33" (1/1) ... [2021-11-07 08:25:34,154 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:33" (1/1) ... [2021-11-07 08:25:34,194 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:33" (1/1) ... [2021-11-07 08:25:34,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:33" (1/1) ... [2021-11-07 08:25:34,231 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:33" (1/1) ... [2021-11-07 08:25:34,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:25:34,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:25:34,242 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:25:34,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:25:34,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:33" (1/1) ... [2021-11-07 08:25:34,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:25:34,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c467f24-13ce-4769-8934-d3280a6d8703/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:25:34,283 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c467f24-13ce-4769-8934-d3280a6d8703/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:25:34,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c467f24-13ce-4769-8934-d3280a6d8703/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:25:34,327 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 08:25:34,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:25:34,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:25:34,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:25:34,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:25:36,152 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:25:36,153 INFO L299 CfgBuilder]: Removed 259 assume(true) statements. [2021-11-07 08:25:36,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:25:36 BoogieIcfgContainer [2021-11-07 08:25:36,156 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:25:36,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:25:36,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:25:36,162 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:25:36,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:25:33" (1/3) ... [2021-11-07 08:25:36,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@490458c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:25:36, skipping insertion in model container [2021-11-07 08:25:36,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:25:33" (2/3) ... [2021-11-07 08:25:36,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@490458c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:25:36, skipping insertion in model container [2021-11-07 08:25:36,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:25:36" (3/3) ... [2021-11-07 08:25:36,166 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec7_product18.cil.c [2021-11-07 08:25:36,172 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:25:36,172 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 08:25:36,230 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:25:36,236 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 08:25:36,237 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 08:25:36,262 INFO L276 IsEmpty]: Start isEmpty. Operand has 397 states, 394 states have (on average 1.7614213197969544) internal successors, (694), 396 states have internal predecessors, (694), 0 states have call successors, (0), 0 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 08:25:36,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 08:25:36,274 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:25:36,275 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] [2021-11-07 08:25:36,275 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:25:36,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:25:36,281 INFO L85 PathProgramCache]: Analyzing trace with hash 931063604, now seen corresponding path program 1 times [2021-11-07 08:25:36,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:25:36,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962933988] [2021-11-07 08:25:36,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:25:36,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:25:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:25:36,724 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 08:25:36,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:25:36,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962933988] [2021-11-07 08:25:36,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962933988] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:25:36,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:25:36,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:25:36,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127498757] [2021-11-07 08:25:36,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:25:36,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:25:36,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:25:36,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:25:36,751 INFO L87 Difference]: Start difference. First operand has 397 states, 394 states have (on average 1.7614213197969544) internal successors, (694), 396 states have internal predecessors, (694), 0 states have call successors, (0), 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 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 08:25:36,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:25:36,917 INFO L93 Difference]: Finished difference Result 1156 states and 2024 transitions. [2021-11-07 08:25:36,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:25:36,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-11-07 08:25:36,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:25:36,945 INFO L225 Difference]: With dead ends: 1156 [2021-11-07 08:25:36,946 INFO L226 Difference]: Without dead ends: 678 [2021-11-07 08:25:36,953 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 08:25:36,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-11-07 08:25:37,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 348. [2021-11-07 08:25:37,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 346 states have (on average 1.7485549132947977) internal successors, (605), 347 states have internal predecessors, (605), 0 states have call successors, (0), 0 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 08:25:37,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 605 transitions. [2021-11-07 08:25:37,023 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 605 transitions. Word has length 38 [2021-11-07 08:25:37,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:25:37,023 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 605 transitions. [2021-11-07 08:25:37,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 08:25:37,027 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 605 transitions. [2021-11-07 08:25:37,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 08:25:37,032 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:25:37,032 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] [2021-11-07 08:25:37,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:25:37,033 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:25:37,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:25:37,038 INFO L85 PathProgramCache]: Analyzing trace with hash -730719545, now seen corresponding path program 1 times [2021-11-07 08:25:37,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:25:37,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252870679] [2021-11-07 08:25:37,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:25:37,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:25:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:25:37,207 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 08:25:37,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:25:37,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252870679] [2021-11-07 08:25:37,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252870679] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:25:37,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:25:37,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:25:37,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670521405] [2021-11-07 08:25:37,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:25:37,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:25:37,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:25:37,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:25:37,213 INFO L87 Difference]: Start difference. First operand 348 states and 605 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 08:25:37,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:25:37,418 INFO L93 Difference]: Finished difference Result 993 states and 1731 transitions. [2021-11-07 08:25:37,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:25:37,419 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-11-07 08:25:37,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:25:37,425 INFO L225 Difference]: With dead ends: 993 [2021-11-07 08:25:37,425 INFO L226 Difference]: Without dead ends: 664 [2021-11-07 08:25:37,427 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 08:25:37,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-11-07 08:25:37,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 348. [2021-11-07 08:25:37,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 346 states have (on average 1.745664739884393) internal successors, (604), 347 states have internal predecessors, (604), 0 states have call successors, (0), 0 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 08:25:37,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 604 transitions. [2021-11-07 08:25:37,475 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 604 transitions. Word has length 40 [2021-11-07 08:25:37,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:25:37,476 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 604 transitions. [2021-11-07 08:25:37,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 08:25:37,476 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 604 transitions. [2021-11-07 08:25:37,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 08:25:37,486 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:25:37,486 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] [2021-11-07 08:25:37,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:25:37,488 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:25:37,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:25:37,490 INFO L85 PathProgramCache]: Analyzing trace with hash 653452564, now seen corresponding path program 1 times [2021-11-07 08:25:37,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:25:37,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987160107] [2021-11-07 08:25:37,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:25:37,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:25:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:25:37,603 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 08:25:37,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:25:37,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987160107] [2021-11-07 08:25:37,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987160107] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:25:37,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:25:37,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:25:37,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411472051] [2021-11-07 08:25:37,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:25:37,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:25:37,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:25:37,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:25:37,620 INFO L87 Difference]: Start difference. First operand 348 states and 604 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 08:25:37,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:25:37,654 INFO L93 Difference]: Finished difference Result 678 states and 1182 transitions. [2021-11-07 08:25:37,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:25:37,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-11-07 08:25:37,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:25:37,658 INFO L225 Difference]: With dead ends: 678 [2021-11-07 08:25:37,658 INFO L226 Difference]: Without dead ends: 353 [2021-11-07 08:25:37,659 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 08:25:37,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-11-07 08:25:37,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 348. [2021-11-07 08:25:37,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 346 states have (on average 1.7427745664739884) internal successors, (603), 347 states have internal predecessors, (603), 0 states have call successors, (0), 0 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 08:25:37,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 603 transitions. [2021-11-07 08:25:37,674 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 603 transitions. Word has length 41 [2021-11-07 08:25:37,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:25:37,675 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 603 transitions. [2021-11-07 08:25:37,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 08:25:37,675 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 603 transitions. [2021-11-07 08:25:37,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 08:25:37,676 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:25:37,676 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] [2021-11-07 08:25:37,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 08:25:37,677 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:25:37,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:25:37,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1387978714, now seen corresponding path program 1 times [2021-11-07 08:25:37,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:25:37,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667058359] [2021-11-07 08:25:37,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:25:37,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:25:37,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:25:37,775 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 08:25:37,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:25:37,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667058359] [2021-11-07 08:25:37,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667058359] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:25:37,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:25:37,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:25:37,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923718502] [2021-11-07 08:25:37,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:25:37,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:25:37,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:25:37,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:25:37,780 INFO L87 Difference]: Start difference. First operand 348 states and 603 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 08:25:37,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:25:37,823 INFO L93 Difference]: Finished difference Result 688 states and 1195 transitions. [2021-11-07 08:25:37,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:25:37,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-11-07 08:25:37,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:25:37,827 INFO L225 Difference]: With dead ends: 688 [2021-11-07 08:25:37,827 INFO L226 Difference]: Without dead ends: 348 [2021-11-07 08:25:37,829 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 08:25:37,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-11-07 08:25:37,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 348. [2021-11-07 08:25:37,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 346 states have (on average 1.7369942196531791) internal successors, (601), 347 states have internal predecessors, (601), 0 states have call successors, (0), 0 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 08:25:37,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 601 transitions. [2021-11-07 08:25:37,845 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 601 transitions. Word has length 42 [2021-11-07 08:25:37,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:25:37,845 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 601 transitions. [2021-11-07 08:25:37,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 08:25:37,845 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 601 transitions. [2021-11-07 08:25:37,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 08:25:37,847 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:25:37,847 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] [2021-11-07 08:25:37,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 08:25:37,847 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:25:37,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:25:37,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1456415377, now seen corresponding path program 1 times [2021-11-07 08:25:37,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:25:37,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014875578] [2021-11-07 08:25:37,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:25:37,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:25:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:25:37,969 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 08:25:37,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:25:37,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014875578] [2021-11-07 08:25:37,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014875578] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:25:37,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:25:37,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:25:37,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247591312] [2021-11-07 08:25:37,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:25:37,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:25:37,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:25:37,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:25:37,972 INFO L87 Difference]: Start difference. First operand 348 states and 601 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 08:25:38,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:25:38,106 INFO L93 Difference]: Finished difference Result 983 states and 1711 transitions. [2021-11-07 08:25:38,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:25:38,107 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-11-07 08:25:38,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:25:38,112 INFO L225 Difference]: With dead ends: 983 [2021-11-07 08:25:38,112 INFO L226 Difference]: Without dead ends: 662 [2021-11-07 08:25:38,113 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 08:25:38,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-11-07 08:25:38,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 348. [2021-11-07 08:25:38,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 346 states have (on average 1.7341040462427746) internal successors, (600), 347 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:25:38,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 600 transitions. [2021-11-07 08:25:38,138 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 600 transitions. Word has length 43 [2021-11-07 08:25:38,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:25:38,140 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 600 transitions. [2021-11-07 08:25:38,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 08:25:38,140 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 600 transitions. [2021-11-07 08:25:38,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 08:25:38,141 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:25:38,142 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 08:25:38,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 08:25:38,142 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:25:38,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:25:38,143 INFO L85 PathProgramCache]: Analyzing trace with hash 988393234, now seen corresponding path program 1 times [2021-11-07 08:25:38,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:25:38,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825463184] [2021-11-07 08:25:38,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:25:38,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:25:38,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:25:38,223 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 08:25:38,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:25:38,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825463184] [2021-11-07 08:25:38,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825463184] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:25:38,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:25:38,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:25:38,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406335427] [2021-11-07 08:25:38,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:25:38,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:25:38,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:25:38,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:25:38,231 INFO L87 Difference]: Start difference. First operand 348 states and 600 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 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 08:25:38,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:25:38,391 INFO L93 Difference]: Finished difference Result 988 states and 1716 transitions. [2021-11-07 08:25:38,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:25:38,392 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 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 08:25:38,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:25:38,398 INFO L225 Difference]: With dead ends: 988 [2021-11-07 08:25:38,398 INFO L226 Difference]: Without dead ends: 667 [2021-11-07 08:25:38,399 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 08:25:38,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-11-07 08:25:38,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 348. [2021-11-07 08:25:38,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 346 states have (on average 1.73121387283237) internal successors, (599), 347 states have internal predecessors, (599), 0 states have call successors, (0), 0 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 08:25:38,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 599 transitions. [2021-11-07 08:25:38,422 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 599 transitions. Word has length 44 [2021-11-07 08:25:38,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:25:38,423 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 599 transitions. [2021-11-07 08:25:38,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 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 08:25:38,423 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 599 transitions. [2021-11-07 08:25:38,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 08:25:38,425 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:25:38,425 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] [2021-11-07 08:25:38,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 08:25:38,426 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:25:38,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:25:38,426 INFO L85 PathProgramCache]: Analyzing trace with hash -866984918, now seen corresponding path program 1 times [2021-11-07 08:25:38,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:25:38,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016896826] [2021-11-07 08:25:38,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:25:38,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:25:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:25:38,526 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 08:25:38,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:25:38,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016896826] [2021-11-07 08:25:38,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016896826] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:25:38,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:25:38,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:25:38,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895136119] [2021-11-07 08:25:38,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:25:38,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:25:38,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:25:38,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:25:38,532 INFO L87 Difference]: Start difference. First operand 348 states and 599 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 08:25:38,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:25:38,556 INFO L93 Difference]: Finished difference Result 458 states and 774 transitions. [2021-11-07 08:25:38,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:25:38,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2021-11-07 08:25:38,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:25:38,559 INFO L225 Difference]: With dead ends: 458 [2021-11-07 08:25:38,559 INFO L226 Difference]: Without dead ends: 351 [2021-11-07 08:25:38,560 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 08:25:38,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-11-07 08:25:38,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 350. [2021-11-07 08:25:38,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 348 states have (on average 1.7270114942528736) internal successors, (601), 349 states have internal predecessors, (601), 0 states have call successors, (0), 0 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 08:25:38,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 601 transitions. [2021-11-07 08:25:38,583 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 601 transitions. Word has length 45 [2021-11-07 08:25:38,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:25:38,583 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 601 transitions. [2021-11-07 08:25:38,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 08:25:38,584 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 601 transitions. [2021-11-07 08:25:38,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 08:25:38,585 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:25:38,585 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] [2021-11-07 08:25:38,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 08:25:38,585 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:25:38,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:25:38,586 INFO L85 PathProgramCache]: Analyzing trace with hash 47112344, now seen corresponding path program 1 times [2021-11-07 08:25:38,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:25:38,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717327300] [2021-11-07 08:25:38,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:25:38,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:25:38,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:25:38,644 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 08:25:38,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:25:38,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717327300] [2021-11-07 08:25:38,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717327300] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:25:38,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:25:38,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:25:38,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141421844] [2021-11-07 08:25:38,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:25:38,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:25:38,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:25:38,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:25:38,646 INFO L87 Difference]: Start difference. First operand 350 states and 601 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 08:25:38,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:25:38,690 INFO L93 Difference]: Finished difference Result 936 states and 1627 transitions. [2021-11-07 08:25:38,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:25:38,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2021-11-07 08:25:38,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:25:38,698 INFO L225 Difference]: With dead ends: 936 [2021-11-07 08:25:38,699 INFO L226 Difference]: Without dead ends: 617 [2021-11-07 08:25:38,700 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 08:25:38,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-11-07 08:25:38,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 510. [2021-11-07 08:25:38,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 508 states have (on average 1.7598425196850394) internal successors, (894), 509 states have internal predecessors, (894), 0 states have call successors, (0), 0 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 08:25:38,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 894 transitions. [2021-11-07 08:25:38,751 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 894 transitions. Word has length 53 [2021-11-07 08:25:38,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:25:38,751 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 894 transitions. [2021-11-07 08:25:38,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 08:25:38,752 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 894 transitions. [2021-11-07 08:25:38,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 08:25:38,753 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:25:38,753 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] [2021-11-07 08:25:38,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 08:25:38,754 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:25:38,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:25:38,754 INFO L85 PathProgramCache]: Analyzing trace with hash 998995767, now seen corresponding path program 1 times [2021-11-07 08:25:38,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:25:38,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177686250] [2021-11-07 08:25:38,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:25:38,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:25:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:25:38,828 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 08:25:38,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:25:38,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177686250] [2021-11-07 08:25:38,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177686250] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:25:38,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:25:38,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:25:38,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771021748] [2021-11-07 08:25:38,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:25:38,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:25:38,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:25:38,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:25:38,831 INFO L87 Difference]: Start difference. First operand 510 states and 894 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:25:39,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:25:39,090 INFO L93 Difference]: Finished difference Result 1460 states and 2588 transitions. [2021-11-07 08:25:39,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:25:39,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 08:25:39,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:25:39,097 INFO L225 Difference]: With dead ends: 1460 [2021-11-07 08:25:39,098 INFO L226 Difference]: Without dead ends: 981 [2021-11-07 08:25:39,099 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 08:25:39,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2021-11-07 08:25:39,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 510. [2021-11-07 08:25:39,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 508 states have (on average 1.7559055118110236) internal successors, (892), 509 states have internal predecessors, (892), 0 states have call successors, (0), 0 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 08:25:39,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 892 transitions. [2021-11-07 08:25:39,143 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 892 transitions. Word has length 54 [2021-11-07 08:25:39,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:25:39,143 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 892 transitions. [2021-11-07 08:25:39,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:25:39,144 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 892 transitions. [2021-11-07 08:25:39,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 08:25:39,145 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:25:39,145 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] [2021-11-07 08:25:39,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 08:25:39,146 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:25:39,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:25:39,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1409039922, now seen corresponding path program 1 times [2021-11-07 08:25:39,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:25:39,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206554531] [2021-11-07 08:25:39,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:25:39,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:25:39,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:25:39,207 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 08:25:39,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:25:39,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206554531] [2021-11-07 08:25:39,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206554531] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:25:39,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:25:39,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:25:39,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734454641] [2021-11-07 08:25:39,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:25:39,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:25:39,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:25:39,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:25:39,210 INFO L87 Difference]: Start difference. First operand 510 states and 892 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 08:25:39,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:25:39,301 INFO L93 Difference]: Finished difference Result 1458 states and 2580 transitions. [2021-11-07 08:25:39,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:25:39,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-11-07 08:25:39,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:25:39,309 INFO L225 Difference]: With dead ends: 1458 [2021-11-07 08:25:39,309 INFO L226 Difference]: Without dead ends: 979 [2021-11-07 08:25:39,310 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 08:25:39,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-11-07 08:25:39,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 872. [2021-11-07 08:25:39,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 870 states have (on average 1.7873563218390804) internal successors, (1555), 871 states have internal predecessors, (1555), 0 states have call successors, (0), 0 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 08:25:39,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1555 transitions. [2021-11-07 08:25:39,372 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1555 transitions. Word has length 55 [2021-11-07 08:25:39,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:25:39,372 INFO L470 AbstractCegarLoop]: Abstraction has 872 states and 1555 transitions. [2021-11-07 08:25:39,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 08:25:39,372 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1555 transitions. [2021-11-07 08:25:39,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 08:25:39,374 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:25:39,374 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] [2021-11-07 08:25:39,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 08:25:39,375 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:25:39,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:25:39,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1720982292, now seen corresponding path program 1 times [2021-11-07 08:25:39,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:25:39,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969041221] [2021-11-07 08:25:39,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:25:39,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:25:39,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:25:39,453 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 08:25:39,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:25:39,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969041221] [2021-11-07 08:25:39,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969041221] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:25:39,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831228362] [2021-11-07 08:25:39,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:25:39,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:25:39,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c467f24-13ce-4769-8934-d3280a6d8703/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:25:39,460 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c467f24-13ce-4769-8934-d3280a6d8703/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:25:39,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c467f24-13ce-4769-8934-d3280a6d8703/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:25:39,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:25:39,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:25:39,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:25:39,901 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 08:25:39,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831228362] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:25:39,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:25:39,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-07 08:25:39,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427906524] [2021-11-07 08:25:39,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:25:39,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:25:39,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:25:39,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:25:39,903 INFO L87 Difference]: Start difference. First operand 872 states and 1555 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:25:40,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:25:40,054 INFO L93 Difference]: Finished difference Result 1305 states and 2293 transitions. [2021-11-07 08:25:40,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:25:40,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 08:25:40,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:25:40,063 INFO L225 Difference]: With dead ends: 1305 [2021-11-07 08:25:40,063 INFO L226 Difference]: Without dead ends: 1198 [2021-11-07 08:25:40,064 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 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 08:25:40,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2021-11-07 08:25:40,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1088. [2021-11-07 08:25:40,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1086 states have (on average 1.79097605893186) internal successors, (1945), 1087 states have internal predecessors, (1945), 0 states have call successors, (0), 0 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 08:25:40,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 1945 transitions. [2021-11-07 08:25:40,144 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 1945 transitions. Word has length 55 [2021-11-07 08:25:40,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:25:40,145 INFO L470 AbstractCegarLoop]: Abstraction has 1088 states and 1945 transitions. [2021-11-07 08:25:40,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:25:40,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 1945 transitions. [2021-11-07 08:25:40,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 08:25:40,147 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:25:40,148 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:25:40,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c467f24-13ce-4769-8934-d3280a6d8703/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:25:40,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c467f24-13ce-4769-8934-d3280a6d8703/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:25:40,376 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:25:40,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:25:40,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1024322647, now seen corresponding path program 1 times [2021-11-07 08:25:40,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:25:40,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237255160] [2021-11-07 08:25:40,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:25:40,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:25:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:25:40,448 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 08:25:40,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:25:40,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237255160] [2021-11-07 08:25:40,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237255160] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:25:40,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:25:40,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:25:40,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042545664] [2021-11-07 08:25:40,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:25:40,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:25:40,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:25:40,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:25:40,451 INFO L87 Difference]: Start difference. First operand 1088 states and 1945 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 08:25:40,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:25:40,562 INFO L93 Difference]: Finished difference Result 2898 states and 5209 transitions. [2021-11-07 08:25:40,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:25:40,563 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 08:25:40,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:25:40,575 INFO L225 Difference]: With dead ends: 2898 [2021-11-07 08:25:40,575 INFO L226 Difference]: Without dead ends: 1911 [2021-11-07 08:25:40,578 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 08:25:40,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2021-11-07 08:25:40,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1804. [2021-11-07 08:25:40,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1802 states have (on average 1.8035516093229744) internal successors, (3250), 1803 states have internal predecessors, (3250), 0 states have call successors, (0), 0 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 08:25:40,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 3250 transitions. [2021-11-07 08:25:40,726 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 3250 transitions. Word has length 59 [2021-11-07 08:25:40,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:25:40,727 INFO L470 AbstractCegarLoop]: Abstraction has 1804 states and 3250 transitions. [2021-11-07 08:25:40,727 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 08:25:40,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 3250 transitions. [2021-11-07 08:25:40,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 08:25:40,730 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:25:40,731 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:25:40,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 08:25:40,731 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:25:40,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:25:40,732 INFO L85 PathProgramCache]: Analyzing trace with hash 543985961, now seen corresponding path program 1 times [2021-11-07 08:25:40,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:25:40,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458248396] [2021-11-07 08:25:40,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:25:40,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:25:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:25:40,808 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 08:25:40,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:25:40,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458248396] [2021-11-07 08:25:40,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458248396] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:25:40,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:25:40,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:25:40,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320497256] [2021-11-07 08:25:40,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:25:40,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:25:40,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:25:40,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:25:40,812 INFO L87 Difference]: Start difference. First operand 1804 states and 3250 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:25:41,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:25:41,023 INFO L93 Difference]: Finished difference Result 4782 states and 8643 transitions. [2021-11-07 08:25:41,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:25:41,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 08:25:41,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:25:41,044 INFO L225 Difference]: With dead ends: 4782 [2021-11-07 08:25:41,044 INFO L226 Difference]: Without dead ends: 3113 [2021-11-07 08:25:41,047 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 08:25:41,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3113 states. [2021-11-07 08:25:41,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3113 to 3006. [2021-11-07 08:25:41,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3006 states, 3004 states have (on average 1.809254327563249) internal successors, (5435), 3005 states have internal predecessors, (5435), 0 states have call successors, (0), 0 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 08:25:41,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3006 states to 3006 states and 5435 transitions. [2021-11-07 08:25:41,264 INFO L78 Accepts]: Start accepts. Automaton has 3006 states and 5435 transitions. Word has length 60 [2021-11-07 08:25:41,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:25:41,264 INFO L470 AbstractCegarLoop]: Abstraction has 3006 states and 5435 transitions. [2021-11-07 08:25:41,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:25:41,265 INFO L276 IsEmpty]: Start isEmpty. Operand 3006 states and 5435 transitions. [2021-11-07 08:25:41,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 08:25:41,273 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:25:41,274 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] [2021-11-07 08:25:41,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 08:25:41,274 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:25:41,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:25:41,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1217208678, now seen corresponding path program 1 times [2021-11-07 08:25:41,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:25:41,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110743744] [2021-11-07 08:25:41,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:25:41,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:25:41,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:25:41,343 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 08:25:41,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:25:41,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110743744] [2021-11-07 08:25:41,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110743744] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:25:41,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:25:41,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:25:41,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846855993] [2021-11-07 08:25:41,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:25:41,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:25:41,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:25:41,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:25:41,347 INFO L87 Difference]: Start difference. First operand 3006 states and 5435 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 08:25:41,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:25:41,657 INFO L93 Difference]: Finished difference Result 8104 states and 14681 transitions. [2021-11-07 08:25:41,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:25:41,657 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 08:25:41,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:25:41,692 INFO L225 Difference]: With dead ends: 8104 [2021-11-07 08:25:41,692 INFO L226 Difference]: Without dead ends: 5267 [2021-11-07 08:25:41,697 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 08:25:41,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5267 states. [2021-11-07 08:25:42,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5267 to 5160. [2021-11-07 08:25:42,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5160 states, 5158 states have (on average 1.8107793718495542) internal successors, (9340), 5159 states have internal predecessors, (9340), 0 states have call successors, (0), 0 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 08:25:42,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5160 states to 5160 states and 9340 transitions. [2021-11-07 08:25:42,041 INFO L78 Accepts]: Start accepts. Automaton has 5160 states and 9340 transitions. Word has length 61 [2021-11-07 08:25:42,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:25:42,041 INFO L470 AbstractCegarLoop]: Abstraction has 5160 states and 9340 transitions. [2021-11-07 08:25:42,042 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 08:25:42,042 INFO L276 IsEmpty]: Start isEmpty. Operand 5160 states and 9340 transitions. [2021-11-07 08:25:42,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 08:25:42,045 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:25:42,045 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:25:42,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 08:25:42,046 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:25:42,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:25:42,047 INFO L85 PathProgramCache]: Analyzing trace with hash 2043618042, now seen corresponding path program 1 times [2021-11-07 08:25:42,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:25:42,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173822574] [2021-11-07 08:25:42,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:25:42,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:25:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:25:42,098 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 08:25:42,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:25:42,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173822574] [2021-11-07 08:25:42,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173822574] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:25:42,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:25:42,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:25:42,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050228114] [2021-11-07 08:25:42,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:25:42,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:25:42,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:25:42,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:25:42,101 INFO L87 Difference]: Start difference. First operand 5160 states and 9340 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:25:42,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:25:42,649 INFO L93 Difference]: Finished difference Result 15024 states and 27238 transitions. [2021-11-07 08:25:42,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:25:42,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 08:25:42,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:25:42,710 INFO L225 Difference]: With dead ends: 15024 [2021-11-07 08:25:42,711 INFO L226 Difference]: Without dead ends: 10037 [2021-11-07 08:25:42,720 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 08:25:42,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10037 states. [2021-11-07 08:25:43,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10037 to 9930. [2021-11-07 08:25:43,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9930 states, 9928 states have (on average 1.811140209508461) internal successors, (17981), 9929 states have internal predecessors, (17981), 0 states have call successors, (0), 0 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 08:25:43,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9930 states to 9930 states and 17981 transitions. [2021-11-07 08:25:43,402 INFO L78 Accepts]: Start accepts. Automaton has 9930 states and 17981 transitions. Word has length 62 [2021-11-07 08:25:43,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:25:43,402 INFO L470 AbstractCegarLoop]: Abstraction has 9930 states and 17981 transitions. [2021-11-07 08:25:43,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:25:43,403 INFO L276 IsEmpty]: Start isEmpty. Operand 9930 states and 17981 transitions. [2021-11-07 08:25:43,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 08:25:43,408 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:25:43,408 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:25:43,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 08:25:43,408 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:25:43,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:25:43,409 INFO L85 PathProgramCache]: Analyzing trace with hash -993080119, now seen corresponding path program 1 times [2021-11-07 08:25:43,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:25:43,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288830721] [2021-11-07 08:25:43,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:25:43,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:25:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:25:43,462 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 08:25:43,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:25:43,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288830721] [2021-11-07 08:25:43,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288830721] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:25:43,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:25:43,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:25:43,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579200542] [2021-11-07 08:25:43,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:25:43,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:25:43,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:25:43,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:25:43,465 INFO L87 Difference]: Start difference. First operand 9930 states and 17981 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:25:44,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:25:44,461 INFO L93 Difference]: Finished difference Result 29036 states and 52636 transitions. [2021-11-07 08:25:44,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:25:44,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 08:25:44,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:25:44,524 INFO L225 Difference]: With dead ends: 29036 [2021-11-07 08:25:44,525 INFO L226 Difference]: Without dead ends: 19287 [2021-11-07 08:25:44,541 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 08:25:44,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19287 states. [2021-11-07 08:25:45,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19287 to 19180. [2021-11-07 08:25:45,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19180 states, 19178 states have (on average 1.810303472729169) internal successors, (34718), 19179 states have internal predecessors, (34718), 0 states have call successors, (0), 0 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 08:25:45,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19180 states to 19180 states and 34718 transitions. [2021-11-07 08:25:45,890 INFO L78 Accepts]: Start accepts. Automaton has 19180 states and 34718 transitions. Word has length 63 [2021-11-07 08:25:45,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:25:45,890 INFO L470 AbstractCegarLoop]: Abstraction has 19180 states and 34718 transitions. [2021-11-07 08:25:45,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:25:45,891 INFO L276 IsEmpty]: Start isEmpty. Operand 19180 states and 34718 transitions. [2021-11-07 08:25:45,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 08:25:45,899 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:25:45,899 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:25:45,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 08:25:45,900 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:25:45,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:25:45,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1847827396, now seen corresponding path program 1 times [2021-11-07 08:25:45,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:25:45,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438203004] [2021-11-07 08:25:45,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:25:45,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:25:45,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:25:45,968 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 08:25:45,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:25:45,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438203004] [2021-11-07 08:25:45,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438203004] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:25:45,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:25:45,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:25:45,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361592016] [2021-11-07 08:25:45,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:25:45,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:25:45,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:25:45,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:25:45,972 INFO L87 Difference]: Start difference. First operand 19180 states and 34718 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:25:47,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:25:47,740 INFO L93 Difference]: Finished difference Result 56972 states and 103161 transitions. [2021-11-07 08:25:47,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:25:47,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 08:25:47,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:25:47,849 INFO L225 Difference]: With dead ends: 56972 [2021-11-07 08:25:47,849 INFO L226 Difference]: Without dead ends: 37977 [2021-11-07 08:25:47,880 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 08:25:47,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37977 states. [2021-11-07 08:25:49,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37977 to 37870. [2021-11-07 08:25:49,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37870 states, 37868 states have (on average 1.8075155804373086) internal successors, (68447), 37869 states have internal predecessors, (68447), 0 states have call successors, (0), 0 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 08:25:50,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37870 states to 37870 states and 68447 transitions. [2021-11-07 08:25:50,062 INFO L78 Accepts]: Start accepts. Automaton has 37870 states and 68447 transitions. Word has length 64 [2021-11-07 08:25:50,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:25:50,063 INFO L470 AbstractCegarLoop]: Abstraction has 37870 states and 68447 transitions. [2021-11-07 08:25:50,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:25:50,063 INFO L276 IsEmpty]: Start isEmpty. Operand 37870 states and 68447 transitions. [2021-11-07 08:25:50,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 08:25:50,069 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:25:50,070 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] [2021-11-07 08:25:50,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 08:25:50,070 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:25:50,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:25:50,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1463664624, now seen corresponding path program 1 times [2021-11-07 08:25:50,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:25:50,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267866045] [2021-11-07 08:25:50,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:25:50,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:25:50,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:25:50,148 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 08:25:50,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:25:50,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267866045] [2021-11-07 08:25:50,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267866045] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:25:50,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:25:50,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:25:50,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095206685] [2021-11-07 08:25:50,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:25:50,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:25:50,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:25:50,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:25:50,152 INFO L87 Difference]: Start difference. First operand 37870 states and 68447 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 08:25:53,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:25:53,268 INFO L93 Difference]: Finished difference Result 111313 states and 201154 transitions. [2021-11-07 08:25:53,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:25:53,268 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 65 [2021-11-07 08:25:53,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:25:53,462 INFO L225 Difference]: With dead ends: 111313 [2021-11-07 08:25:53,463 INFO L226 Difference]: Without dead ends: 73696 [2021-11-07 08:25:53,510 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 08:25:53,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73696 states. [2021-11-07 08:25:55,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73696 to 37870. [2021-11-07 08:25:55,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37870 states, 37868 states have (on average 1.8007024400549276) internal successors, (68189), 37869 states have internal predecessors, (68189), 0 states have call successors, (0), 0 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 08:25:55,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37870 states to 37870 states and 68189 transitions. [2021-11-07 08:25:55,637 INFO L78 Accepts]: Start accepts. Automaton has 37870 states and 68189 transitions. Word has length 65 [2021-11-07 08:25:55,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:25:55,638 INFO L470 AbstractCegarLoop]: Abstraction has 37870 states and 68189 transitions. [2021-11-07 08:25:55,638 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 08:25:55,638 INFO L276 IsEmpty]: Start isEmpty. Operand 37870 states and 68189 transitions. [2021-11-07 08:25:55,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 08:25:55,652 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:25:55,652 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] [2021-11-07 08:25:55,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 08:25:55,653 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:25:55,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:25:55,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1775606994, now seen corresponding path program 2 times [2021-11-07 08:25:55,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:25:55,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455320133] [2021-11-07 08:25:55,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:25:55,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:25:55,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:25:55,740 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 08:25:55,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:25:55,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455320133] [2021-11-07 08:25:55,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455320133] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:25:55,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:25:55,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:25:55,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841226578] [2021-11-07 08:25:55,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:25:55,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:25:55,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:25:55,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:25:55,745 INFO L87 Difference]: Start difference. First operand 37870 states and 68189 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 08:25:57,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:25:57,520 INFO L93 Difference]: Finished difference Result 75588 states and 136115 transitions. [2021-11-07 08:25:57,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:25:57,524 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 08:25:57,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:25:57,594 INFO L225 Difference]: With dead ends: 75588 [2021-11-07 08:25:57,595 INFO L226 Difference]: Without dead ends: 37977 [2021-11-07 08:25:57,620 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 08:25:57,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37977 states. [2021-11-07 08:25:59,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37977 to 37870. [2021-11-07 08:25:59,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37870 states, 37868 states have (on average 1.7973222773845992) internal successors, (68061), 37869 states have internal predecessors, (68061), 0 states have call successors, (0), 0 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 08:25:59,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37870 states to 37870 states and 68061 transitions. [2021-11-07 08:25:59,291 INFO L78 Accepts]: Start accepts. Automaton has 37870 states and 68061 transitions. Word has length 65 [2021-11-07 08:25:59,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:25:59,291 INFO L470 AbstractCegarLoop]: Abstraction has 37870 states and 68061 transitions. [2021-11-07 08:25:59,292 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 08:25:59,292 INFO L276 IsEmpty]: Start isEmpty. Operand 37870 states and 68061 transitions. [2021-11-07 08:25:59,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 08:25:59,299 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:25:59,299 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 08:25:59,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 08:25:59,300 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:25:59,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:25:59,300 INFO L85 PathProgramCache]: Analyzing trace with hash -515882085, now seen corresponding path program 1 times [2021-11-07 08:25:59,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:25:59,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292084955] [2021-11-07 08:25:59,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:25:59,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:25:59,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:25:59,375 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 08:25:59,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:25:59,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292084955] [2021-11-07 08:25:59,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292084955] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:25:59,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:25:59,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:25:59,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296106431] [2021-11-07 08:25:59,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:25:59,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:25:59,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:25:59,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:25:59,380 INFO L87 Difference]: Start difference. First operand 37870 states and 68061 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 08:26:02,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:02,121 INFO L93 Difference]: Finished difference Result 105198 states and 188797 transitions. [2021-11-07 08:26:02,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:26:02,122 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 08:26:02,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:02,244 INFO L225 Difference]: With dead ends: 105198 [2021-11-07 08:26:02,245 INFO L226 Difference]: Without dead ends: 67547 [2021-11-07 08:26:02,272 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 08:26:02,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67547 states. [2021-11-07 08:26:05,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67547 to 67440. [2021-11-07 08:26:05,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67440 states, 67438 states have (on average 1.7893472522909932) internal successors, (120670), 67439 states have internal predecessors, (120670), 0 states have call successors, (0), 0 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 08:26:05,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67440 states to 67440 states and 120670 transitions. [2021-11-07 08:26:05,456 INFO L78 Accepts]: Start accepts. Automaton has 67440 states and 120670 transitions. Word has length 65 [2021-11-07 08:26:05,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:05,456 INFO L470 AbstractCegarLoop]: Abstraction has 67440 states and 120670 transitions. [2021-11-07 08:26:05,457 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 08:26:05,457 INFO L276 IsEmpty]: Start isEmpty. Operand 67440 states and 120670 transitions. [2021-11-07 08:26:05,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 08:26:05,462 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:05,462 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] [2021-11-07 08:26:05,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 08:26:05,462 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:05,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:05,463 INFO L85 PathProgramCache]: Analyzing trace with hash 490721396, now seen corresponding path program 1 times [2021-11-07 08:26:05,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:05,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20116613] [2021-11-07 08:26:05,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:05,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:05,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:05,537 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 08:26:05,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:05,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20116613] [2021-11-07 08:26:05,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20116613] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:05,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:26:05,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 08:26:05,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249578536] [2021-11-07 08:26:05,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:26:05,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:05,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:26:05,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:26:05,540 INFO L87 Difference]: Start difference. First operand 67440 states and 120670 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 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 08:26:10,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:26:10,981 INFO L93 Difference]: Finished difference Result 135050 states and 241611 transitions. [2021-11-07 08:26:10,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:26:10,981 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 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 66 [2021-11-07 08:26:10,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:26:11,280 INFO L225 Difference]: With dead ends: 135050 [2021-11-07 08:26:11,280 INFO L226 Difference]: Without dead ends: 134961 [2021-11-07 08:26:11,313 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:26:11,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134961 states. [2021-11-07 08:26:17,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134961 to 134846. [2021-11-07 08:26:17,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134846 states, 134844 states have (on average 1.7893936697220492) internal successors, (241289), 134845 states have internal predecessors, (241289), 0 states have call successors, (0), 0 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 08:26:17,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134846 states to 134846 states and 241289 transitions. [2021-11-07 08:26:17,632 INFO L78 Accepts]: Start accepts. Automaton has 134846 states and 241289 transitions. Word has length 66 [2021-11-07 08:26:17,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:26:17,632 INFO L470 AbstractCegarLoop]: Abstraction has 134846 states and 241289 transitions. [2021-11-07 08:26:17,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 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 08:26:17,633 INFO L276 IsEmpty]: Start isEmpty. Operand 134846 states and 241289 transitions. [2021-11-07 08:26:17,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 08:26:17,645 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:26:17,645 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] [2021-11-07 08:26:17,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 08:26:17,645 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:26:17,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:26:17,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1341991385, now seen corresponding path program 1 times [2021-11-07 08:26:17,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:26:17,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774073416] [2021-11-07 08:26:17,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:26:17,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:26:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:26:17,719 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 08:26:17,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:26:17,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774073416] [2021-11-07 08:26:17,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774073416] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:26:17,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:26:17,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:26:17,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656773824] [2021-11-07 08:26:17,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:26:17,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:26:17,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:26:17,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:26:17,722 INFO L87 Difference]: Start difference. First operand 134846 states and 241289 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)