./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label00.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label00.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 28aa2103046ded31b2c668ebdabdc65e41c8f634ba4d86773363e431476a6327 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:03:03,047 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:03:03,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:03:03,088 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:03:03,089 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:03:03,090 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:03:03,092 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:03:03,095 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:03:03,098 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:03:03,099 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:03:03,100 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:03:03,102 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:03:03,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:03:03,104 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:03:03,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:03:03,108 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:03:03,117 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:03:03,118 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:03:03,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:03:03,124 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:03:03,126 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:03:03,134 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:03:03,139 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:03:03,140 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:03:03,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:03:03,145 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:03:03,146 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:03:03,147 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:03:03,148 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:03:03,149 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:03:03,150 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:03:03,151 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:03:03,152 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:03:03,154 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:03:03,155 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:03:03,156 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:03:03,157 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:03:03,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:03:03,158 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:03:03,159 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:03:03,160 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:03:03,161 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:03:03,212 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:03:03,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:03:03,228 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:03:03,229 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:03:03,230 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:03:03,230 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:03:03,231 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:03:03,232 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:03:03,232 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:03:03,233 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:03:03,233 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:03:03,233 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:03:03,234 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:03:03,234 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:03:03,235 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:03:03,235 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:03:03,236 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:03:03,236 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:03:03,237 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:03:03,237 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:03:03,237 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:03:03,238 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:03:03,238 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:03:03,239 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:03:03,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:03:03,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:03:03,242 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:03:03,242 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:03:03,243 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:03:03,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:03:03,245 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:03:03,246 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:03:03,246 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:03:03,246 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:03:03,246 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_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 28aa2103046ded31b2c668ebdabdc65e41c8f634ba4d86773363e431476a6327 [2021-11-20 06:03:03,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:03:03,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:03:03,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:03:03,605 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:03:03,606 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:03:03,607 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/eca-rers2012/Problem17_label00.c [2021-11-20 06:03:03,679 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/bin/uautomizer-DQz5hQGWxF/data/99a20bcde/085d4a99d4c24c36b4d1c427751e935c/FLAG849eabea8 [2021-11-20 06:03:04,628 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:03:04,629 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/sv-benchmarks/c/eca-rers2012/Problem17_label00.c [2021-11-20 06:03:04,655 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/bin/uautomizer-DQz5hQGWxF/data/99a20bcde/085d4a99d4c24c36b4d1c427751e935c/FLAG849eabea8 [2021-11-20 06:03:04,676 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/bin/uautomizer-DQz5hQGWxF/data/99a20bcde/085d4a99d4c24c36b4d1c427751e935c [2021-11-20 06:03:04,679 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:03:04,681 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:03:04,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:03:04,684 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:03:04,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:03:04,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:03:04" (1/1) ... [2021-11-20 06:03:04,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b1f4057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:04, skipping insertion in model container [2021-11-20 06:03:04,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:03:04" (1/1) ... [2021-11-20 06:03:04,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:03:04,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:03:05,254 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/sv-benchmarks/c/eca-rers2012/Problem17_label00.c[7994,8007] [2021-11-20 06:03:06,110 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:03:06,120 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:03:06,180 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/sv-benchmarks/c/eca-rers2012/Problem17_label00.c[7994,8007] [2021-11-20 06:03:06,687 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:03:06,711 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:03:06,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:06 WrapperNode [2021-11-20 06:03:06,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:03:06,714 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:03:06,714 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:03:06,714 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:03:06,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:06" (1/1) ... [2021-11-20 06:03:06,807 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:06" (1/1) ... [2021-11-20 06:03:07,291 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-11-20 06:03:07,292 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:03:07,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:03:07,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:03:07,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:03:07,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:06" (1/1) ... [2021-11-20 06:03:07,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:06" (1/1) ... [2021-11-20 06:03:07,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:06" (1/1) ... [2021-11-20 06:03:07,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:06" (1/1) ... [2021-11-20 06:03:07,561 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:06" (1/1) ... [2021-11-20 06:03:07,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:06" (1/1) ... [2021-11-20 06:03:07,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:06" (1/1) ... [2021-11-20 06:03:07,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:03:07,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:03:07,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:03:07,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:03:07,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:06" (1/1) ... [2021-11-20 06:03:07,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:03:07,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:03:07,830 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:03:07,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:03:07,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:03:07,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:03:07,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:03:07,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:03:07,991 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:03:07,993 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:03:12,842 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:03:12,863 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:03:12,867 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:03:12,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:03:12 BoogieIcfgContainer [2021-11-20 06:03:12,873 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:03:12,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:03:12,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:03:12,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:03:12,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:03:04" (1/3) ... [2021-11-20 06:03:12,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b31b7ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:03:12, skipping insertion in model container [2021-11-20 06:03:12,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:03:06" (2/3) ... [2021-11-20 06:03:12,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b31b7ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:03:12, skipping insertion in model container [2021-11-20 06:03:12,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:03:12" (3/3) ... [2021-11-20 06:03:12,887 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label00.c [2021-11-20 06:03:12,894 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:03:12,895 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:03:12,965 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:03:12,974 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:03:12,975 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:03:13,014 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:13,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 06:03:13,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:13,036 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:13,036 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:13,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:13,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1425694346, now seen corresponding path program 1 times [2021-11-20 06:03:13,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:13,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431091460] [2021-11-20 06:03:13,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:13,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:13,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:03:13,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:03:13,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431091460] [2021-11-20 06:03:13,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431091460] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:03:13,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:03:13,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:03:13,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445008683] [2021-11-20 06:03:13,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:03:13,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:03:13,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:03:13,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:03:13,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:03:13,470 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 18.0) internal successors, (54), 2 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) [2021-11-20 06:03:17,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:17,505 INFO L93 Difference]: Finished difference Result 1642 states and 3024 transitions. [2021-11-20 06:03:17,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:03:17,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 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 [2021-11-20 06:03:17,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:17,534 INFO L225 Difference]: With dead ends: 1642 [2021-11-20 06:03:17,534 INFO L226 Difference]: Without dead ends: 975 [2021-11-20 06:03:17,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:03:17,548 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 436 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:17,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 550 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-20 06:03:17,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-11-20 06:03:17,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 972. [2021-11-20 06:03:17,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 1.5077239958805355) internal successors, (1464), 971 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:17,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1464 transitions. [2021-11-20 06:03:17,681 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1464 transitions. Word has length 54 [2021-11-20 06:03:17,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:17,683 INFO L470 AbstractCegarLoop]: Abstraction has 972 states and 1464 transitions. [2021-11-20 06:03:17,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 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) [2021-11-20 06:03:17,684 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1464 transitions. [2021-11-20 06:03:17,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 06:03:17,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:17,698 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:17,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:03:17,700 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:17,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:17,704 INFO L85 PathProgramCache]: Analyzing trace with hash 628146390, now seen corresponding path program 1 times [2021-11-20 06:03:17,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:17,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894544146] [2021-11-20 06:03:17,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:17,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:03:18,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:03:18,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894544146] [2021-11-20 06:03:18,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894544146] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:03:18,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:03:18,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:03:18,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358912946] [2021-11-20 06:03:18,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:03:18,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:03:18,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:03:18,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:03:18,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:03:18,041 INFO L87 Difference]: Start difference. First operand 972 states and 1464 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:23,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:23,719 INFO L93 Difference]: Finished difference Result 3737 states and 5655 transitions. [2021-11-20 06:03:23,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:03:23,720 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2021-11-20 06:03:23,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:23,738 INFO L225 Difference]: With dead ends: 3737 [2021-11-20 06:03:23,738 INFO L226 Difference]: Without dead ends: 2767 [2021-11-20 06:03:23,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:03:23,742 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 867 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 2827 mSolverCounterSat, 590 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 3417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 590 IncrementalHoareTripleChecker+Valid, 2827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:23,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [867 Valid, 313 Invalid, 3417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [590 Valid, 2827 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-11-20 06:03:23,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2767 states. [2021-11-20 06:03:23,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2767 to 2724. [2021-11-20 06:03:23,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2723 states have (on average 1.3947851634226955) internal successors, (3798), 2723 states have internal predecessors, (3798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:23,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 3798 transitions. [2021-11-20 06:03:23,825 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 3798 transitions. Word has length 124 [2021-11-20 06:03:23,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:23,826 INFO L470 AbstractCegarLoop]: Abstraction has 2724 states and 3798 transitions. [2021-11-20 06:03:23,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:23,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 3798 transitions. [2021-11-20 06:03:23,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-20 06:03:23,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:23,830 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:23,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:03:23,831 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:23,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:23,832 INFO L85 PathProgramCache]: Analyzing trace with hash 527466105, now seen corresponding path program 1 times [2021-11-20 06:03:23,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:23,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855843832] [2021-11-20 06:03:23,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:23,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:03:23,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:03:23,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855843832] [2021-11-20 06:03:23,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855843832] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:03:23,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:03:23,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:03:23,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146925585] [2021-11-20 06:03:23,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:03:23,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:03:23,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:03:23,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:03:23,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:03:23,940 INFO L87 Difference]: Start difference. First operand 2724 states and 3798 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:26,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:26,307 INFO L93 Difference]: Finished difference Result 8009 states and 11161 transitions. [2021-11-20 06:03:26,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:03:26,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 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 146 [2021-11-20 06:03:26,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:26,335 INFO L225 Difference]: With dead ends: 8009 [2021-11-20 06:03:26,336 INFO L226 Difference]: Without dead ends: 4428 [2021-11-20 06:03:26,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:03:26,343 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 368 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:26,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:03:26,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4428 states. [2021-11-20 06:03:26,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4428 to 4428. [2021-11-20 06:03:26,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4428 states, 4427 states have (on average 1.2071380167156087) internal successors, (5344), 4427 states have internal predecessors, (5344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:26,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4428 states to 4428 states and 5344 transitions. [2021-11-20 06:03:26,460 INFO L78 Accepts]: Start accepts. Automaton has 4428 states and 5344 transitions. Word has length 146 [2021-11-20 06:03:26,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:26,462 INFO L470 AbstractCegarLoop]: Abstraction has 4428 states and 5344 transitions. [2021-11-20 06:03:26,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:26,463 INFO L276 IsEmpty]: Start isEmpty. Operand 4428 states and 5344 transitions. [2021-11-20 06:03:26,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-20 06:03:26,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:26,471 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:26,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:03:26,472 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:26,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:26,474 INFO L85 PathProgramCache]: Analyzing trace with hash 2015197805, now seen corresponding path program 1 times [2021-11-20 06:03:26,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:26,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700790180] [2021-11-20 06:03:26,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:26,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:26,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:26,692 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 171 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:03:26,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:03:26,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700790180] [2021-11-20 06:03:26,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700790180] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:03:26,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:03:26,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:03:26,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504333731] [2021-11-20 06:03:26,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:03:26,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:03:26,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:03:26,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:03:26,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:03:26,697 INFO L87 Difference]: Start difference. First operand 4428 states and 5344 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:29,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:29,342 INFO L93 Difference]: Finished difference Result 10989 states and 13620 transitions. [2021-11-20 06:03:29,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:03:29,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2021-11-20 06:03:29,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:29,389 INFO L225 Difference]: With dead ends: 10989 [2021-11-20 06:03:29,389 INFO L226 Difference]: Without dead ends: 6563 [2021-11-20 06:03:29,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:03:29,408 INFO L933 BasicCegarLoop]: 743 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:29,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 801 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 1227 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 06:03:29,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6563 states. [2021-11-20 06:03:29,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6563 to 6563. [2021-11-20 06:03:29,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6563 states, 6562 states have (on average 1.2025297165498323) internal successors, (7891), 6562 states have internal predecessors, (7891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:29,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6563 states to 6563 states and 7891 transitions. [2021-11-20 06:03:29,597 INFO L78 Accepts]: Start accepts. Automaton has 6563 states and 7891 transitions. Word has length 206 [2021-11-20 06:03:29,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:29,598 INFO L470 AbstractCegarLoop]: Abstraction has 6563 states and 7891 transitions. [2021-11-20 06:03:29,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:29,598 INFO L276 IsEmpty]: Start isEmpty. Operand 6563 states and 7891 transitions. [2021-11-20 06:03:29,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-20 06:03:29,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:29,603 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:29,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:03:29,603 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:29,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:29,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1777362264, now seen corresponding path program 1 times [2021-11-20 06:03:29,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:29,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793536273] [2021-11-20 06:03:29,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:29,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-20 06:03:29,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:03:29,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793536273] [2021-11-20 06:03:29,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793536273] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:03:29,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:03:29,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:03:29,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93314851] [2021-11-20 06:03:29,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:03:29,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:03:29,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:03:29,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:03:29,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:03:29,773 INFO L87 Difference]: Start difference. First operand 6563 states and 7891 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:32,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:32,700 INFO L93 Difference]: Finished difference Result 16521 states and 20210 transitions. [2021-11-20 06:03:32,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:03:32,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 208 [2021-11-20 06:03:32,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:32,757 INFO L225 Difference]: With dead ends: 16521 [2021-11-20 06:03:32,757 INFO L226 Difference]: Without dead ends: 9960 [2021-11-20 06:03:32,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:03:32,770 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 400 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 1596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:32,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 486 Invalid, 1596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-20 06:03:32,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9960 states. [2021-11-20 06:03:33,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9960 to 6961. [2021-11-20 06:03:33,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6961 states, 6960 states have (on average 1.1939655172413792) internal successors, (8310), 6960 states have internal predecessors, (8310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:33,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6961 states to 6961 states and 8310 transitions. [2021-11-20 06:03:33,062 INFO L78 Accepts]: Start accepts. Automaton has 6961 states and 8310 transitions. Word has length 208 [2021-11-20 06:03:33,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:33,064 INFO L470 AbstractCegarLoop]: Abstraction has 6961 states and 8310 transitions. [2021-11-20 06:03:33,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:33,069 INFO L276 IsEmpty]: Start isEmpty. Operand 6961 states and 8310 transitions. [2021-11-20 06:03:33,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-20 06:03:33,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:33,074 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:33,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:03:33,076 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:33,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:33,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1928280324, now seen corresponding path program 1 times [2021-11-20 06:03:33,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:33,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227812682] [2021-11-20 06:03:33,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:33,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:33,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:33,243 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 06:03:33,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:03:33,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227812682] [2021-11-20 06:03:33,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227812682] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:03:33,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:03:33,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:03:33,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887277596] [2021-11-20 06:03:33,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:03:33,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:03:33,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:03:33,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:03:33,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:03:33,248 INFO L87 Difference]: Start difference. First operand 6961 states and 8310 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:35,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:35,869 INFO L93 Difference]: Finished difference Result 17324 states and 21059 transitions. [2021-11-20 06:03:35,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:03:35,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 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 221 [2021-11-20 06:03:35,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:35,911 INFO L225 Difference]: With dead ends: 17324 [2021-11-20 06:03:35,912 INFO L226 Difference]: Without dead ends: 10365 [2021-11-20 06:03:35,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:03:35,921 INFO L933 BasicCegarLoop]: 400 mSDtfsCounter, 424 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1327 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 1653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 1327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:35,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 452 Invalid, 1653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 1327 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 06:03:35,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10365 states. [2021-11-20 06:03:36,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10365 to 9509. [2021-11-20 06:03:36,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9509 states, 9508 states have (on average 1.1959402608329828) internal successors, (11371), 9508 states have internal predecessors, (11371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:36,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9509 states to 9509 states and 11371 transitions. [2021-11-20 06:03:36,104 INFO L78 Accepts]: Start accepts. Automaton has 9509 states and 11371 transitions. Word has length 221 [2021-11-20 06:03:36,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:36,104 INFO L470 AbstractCegarLoop]: Abstraction has 9509 states and 11371 transitions. [2021-11-20 06:03:36,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:36,105 INFO L276 IsEmpty]: Start isEmpty. Operand 9509 states and 11371 transitions. [2021-11-20 06:03:36,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-20 06:03:36,110 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:36,111 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:36,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:03:36,111 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:36,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:36,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1694467582, now seen corresponding path program 1 times [2021-11-20 06:03:36,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:36,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915404376] [2021-11-20 06:03:36,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:36,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:36,286 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 06:03:36,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:03:36,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915404376] [2021-11-20 06:03:36,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915404376] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:03:36,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:03:36,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:03:36,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726448740] [2021-11-20 06:03:36,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:03:36,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:03:36,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:03:36,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:03:36,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:03:36,298 INFO L87 Difference]: Start difference. First operand 9509 states and 11371 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:39,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:39,084 INFO L93 Difference]: Finished difference Result 25399 states and 30227 transitions. [2021-11-20 06:03:39,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:03:39,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 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 253 [2021-11-20 06:03:39,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:39,118 INFO L225 Difference]: With dead ends: 25399 [2021-11-20 06:03:39,118 INFO L226 Difference]: Without dead ends: 15892 [2021-11-20 06:03:39,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:03:39,132 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 485 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:39,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 282 Invalid, 1682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-20 06:03:39,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15892 states. [2021-11-20 06:03:39,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15892 to 14184. [2021-11-20 06:03:39,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14184 states, 14183 states have (on average 1.184587181837411) internal successors, (16801), 14183 states have internal predecessors, (16801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:39,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14184 states to 14184 states and 16801 transitions. [2021-11-20 06:03:39,408 INFO L78 Accepts]: Start accepts. Automaton has 14184 states and 16801 transitions. Word has length 253 [2021-11-20 06:03:39,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:39,409 INFO L470 AbstractCegarLoop]: Abstraction has 14184 states and 16801 transitions. [2021-11-20 06:03:39,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:39,410 INFO L276 IsEmpty]: Start isEmpty. Operand 14184 states and 16801 transitions. [2021-11-20 06:03:39,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-11-20 06:03:39,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:39,418 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:39,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 06:03:39,419 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:39,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:39,420 INFO L85 PathProgramCache]: Analyzing trace with hash 524926456, now seen corresponding path program 1 times [2021-11-20 06:03:39,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:39,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030319111] [2021-11-20 06:03:39,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:39,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:39,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:39,630 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 06:03:39,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:03:39,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030319111] [2021-11-20 06:03:39,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030319111] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:03:39,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:03:39,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:03:39,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569796327] [2021-11-20 06:03:39,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:03:39,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:03:39,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:03:39,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:03:39,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:03:39,634 INFO L87 Difference]: Start difference. First operand 14184 states and 16801 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:42,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:42,808 INFO L93 Difference]: Finished difference Result 33921 states and 40606 transitions. [2021-11-20 06:03:42,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:03:42,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 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 270 [2021-11-20 06:03:42,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:42,855 INFO L225 Difference]: With dead ends: 33921 [2021-11-20 06:03:42,855 INFO L226 Difference]: Without dead ends: 19739 [2021-11-20 06:03:42,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:03:42,872 INFO L933 BasicCegarLoop]: 403 mSDtfsCounter, 455 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1419 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 1688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:42,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 454 Invalid, 1688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1419 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-20 06:03:42,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19739 states. [2021-11-20 06:03:43,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19739 to 18029. [2021-11-20 06:03:43,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18029 states, 18028 states have (on average 1.2058464610605724) internal successors, (21739), 18028 states have internal predecessors, (21739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:43,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18029 states to 18029 states and 21739 transitions. [2021-11-20 06:03:43,151 INFO L78 Accepts]: Start accepts. Automaton has 18029 states and 21739 transitions. Word has length 270 [2021-11-20 06:03:43,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:43,152 INFO L470 AbstractCegarLoop]: Abstraction has 18029 states and 21739 transitions. [2021-11-20 06:03:43,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:43,152 INFO L276 IsEmpty]: Start isEmpty. Operand 18029 states and 21739 transitions. [2021-11-20 06:03:43,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-11-20 06:03:43,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:43,159 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:43,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 06:03:43,162 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:43,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:43,163 INFO L85 PathProgramCache]: Analyzing trace with hash 937950836, now seen corresponding path program 1 times [2021-11-20 06:03:43,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:43,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221571013] [2021-11-20 06:03:43,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:43,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:43,317 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 242 proven. 70 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-20 06:03:43,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:03:43,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221571013] [2021-11-20 06:03:43,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221571013] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:03:43,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073648661] [2021-11-20 06:03:43,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:43,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:03:43,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:03:43,321 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:03:43,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:03:43,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:43,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:03:43,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:03:44,934 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 242 proven. 70 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-20 06:03:44,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:03:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 312 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-20 06:03:45,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073648661] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:03:45,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:03:45,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-11-20 06:03:45,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702498909] [2021-11-20 06:03:45,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:03:45,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:03:45,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:03:45,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:03:45,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:03:45,986 INFO L87 Difference]: Start difference. First operand 18029 states and 21739 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:50,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:50,810 INFO L93 Difference]: Finished difference Result 49692 states and 60242 transitions. [2021-11-20 06:03:50,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:03:50,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 278 [2021-11-20 06:03:50,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:50,878 INFO L225 Difference]: With dead ends: 49692 [2021-11-20 06:03:50,878 INFO L226 Difference]: Without dead ends: 30794 [2021-11-20 06:03:50,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 551 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:03:50,907 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 1070 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 2265 mSolverCounterSat, 1224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1070 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 3489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1224 IncrementalHoareTripleChecker+Valid, 2265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:50,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1070 Valid, 140 Invalid, 3489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1224 Valid, 2265 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-20 06:03:50,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30794 states. [2021-11-20 06:03:51,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30794 to 30367. [2021-11-20 06:03:51,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30367 states, 30366 states have (on average 1.168938944872555) internal successors, (35496), 30366 states have internal predecessors, (35496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:51,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30367 states to 30367 states and 35496 transitions. [2021-11-20 06:03:51,531 INFO L78 Accepts]: Start accepts. Automaton has 30367 states and 35496 transitions. Word has length 278 [2021-11-20 06:03:51,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:51,532 INFO L470 AbstractCegarLoop]: Abstraction has 30367 states and 35496 transitions. [2021-11-20 06:03:51,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:51,533 INFO L276 IsEmpty]: Start isEmpty. Operand 30367 states and 35496 transitions. [2021-11-20 06:03:51,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-11-20 06:03:51,541 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:51,542 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:51,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:03:51,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:03:51,756 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:51,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:51,757 INFO L85 PathProgramCache]: Analyzing trace with hash -595718805, now seen corresponding path program 1 times [2021-11-20 06:03:51,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:51,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032571175] [2021-11-20 06:03:51,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:51,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:51,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:51,905 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 288 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-20 06:03:51,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:03:51,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032571175] [2021-11-20 06:03:51,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032571175] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:03:51,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:03:51,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:03:51,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152201864] [2021-11-20 06:03:51,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:03:51,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:03:51,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:03:51,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:03:51,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:03:51,909 INFO L87 Difference]: Start difference. First operand 30367 states and 35496 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:54,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:54,995 INFO L93 Difference]: Finished difference Result 76489 states and 89023 transitions. [2021-11-20 06:03:54,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:03:54,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 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 286 [2021-11-20 06:03:54,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:55,055 INFO L225 Difference]: With dead ends: 76489 [2021-11-20 06:03:55,055 INFO L226 Difference]: Without dead ends: 44416 [2021-11-20 06:03:55,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:03:55,080 INFO L933 BasicCegarLoop]: 577 mSDtfsCounter, 482 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:55,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 611 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-20 06:03:55,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44416 states. [2021-11-20 06:03:56,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44416 to 39725. [2021-11-20 06:03:56,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39725 states, 39724 states have (on average 1.1442956399154163) internal successors, (45456), 39724 states have internal predecessors, (45456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:56,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39725 states to 39725 states and 45456 transitions. [2021-11-20 06:03:56,433 INFO L78 Accepts]: Start accepts. Automaton has 39725 states and 45456 transitions. Word has length 286 [2021-11-20 06:03:56,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:56,434 INFO L470 AbstractCegarLoop]: Abstraction has 39725 states and 45456 transitions. [2021-11-20 06:03:56,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:56,434 INFO L276 IsEmpty]: Start isEmpty. Operand 39725 states and 45456 transitions. [2021-11-20 06:03:56,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2021-11-20 06:03:56,443 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:56,443 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:56,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 06:03:56,444 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:56,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:56,445 INFO L85 PathProgramCache]: Analyzing trace with hash 2036376936, now seen corresponding path program 1 times [2021-11-20 06:03:56,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:56,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694703362] [2021-11-20 06:03:56,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:56,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:56,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:03:56,588 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 298 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-20 06:03:56,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:03:56,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694703362] [2021-11-20 06:03:56,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694703362] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:03:56,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:03:56,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:03:56,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787377397] [2021-11-20 06:03:56,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:03:56,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:03:56,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:03:56,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:03:56,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:03:56,592 INFO L87 Difference]: Start difference. First operand 39725 states and 45456 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:58,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:03:58,917 INFO L93 Difference]: Finished difference Result 84968 states and 97499 transitions. [2021-11-20 06:03:58,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:03:58,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 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 291 [2021-11-20 06:03:58,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:03:58,966 INFO L225 Difference]: With dead ends: 84968 [2021-11-20 06:03:58,967 INFO L226 Difference]: Without dead ends: 45245 [2021-11-20 06:03:58,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:03:58,992 INFO L933 BasicCegarLoop]: 767 mSDtfsCounter, 372 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:03:58,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 826 Invalid, 1381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 06:03:59,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45245 states. [2021-11-20 06:03:59,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45245 to 44820. [2021-11-20 06:03:59,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44820 states, 44819 states have (on average 1.1323099578303844) internal successors, (50749), 44819 states have internal predecessors, (50749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:59,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44820 states to 44820 states and 50749 transitions. [2021-11-20 06:03:59,812 INFO L78 Accepts]: Start accepts. Automaton has 44820 states and 50749 transitions. Word has length 291 [2021-11-20 06:03:59,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:03:59,813 INFO L470 AbstractCegarLoop]: Abstraction has 44820 states and 50749 transitions. [2021-11-20 06:03:59,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:03:59,814 INFO L276 IsEmpty]: Start isEmpty. Operand 44820 states and 50749 transitions. [2021-11-20 06:03:59,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-11-20 06:03:59,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:03:59,825 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:03:59,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 06:03:59,826 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:03:59,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:03:59,826 INFO L85 PathProgramCache]: Analyzing trace with hash 308755155, now seen corresponding path program 1 times [2021-11-20 06:03:59,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:03:59,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490257253] [2021-11-20 06:03:59,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:03:59,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:03:59,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:00,028 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 298 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 06:04:00,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:04:00,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490257253] [2021-11-20 06:04:00,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490257253] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:04:00,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:04:00,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:04:00,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089597011] [2021-11-20 06:04:00,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:04:00,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:04:00,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:04:00,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:04:00,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:04:00,031 INFO L87 Difference]: Start difference. First operand 44820 states and 50749 transitions. Second operand has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:04,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:04:04,621 INFO L93 Difference]: Finished difference Result 117359 states and 132890 transitions. [2021-11-20 06:04:04,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:04:04,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 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 314 [2021-11-20 06:04:04,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:04:04,701 INFO L225 Difference]: With dead ends: 117359 [2021-11-20 06:04:04,701 INFO L226 Difference]: Without dead ends: 70840 [2021-11-20 06:04:04,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:04:04,723 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 844 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 2692 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 3097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 2692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:04:04,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [844 Valid, 324 Invalid, 3097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 2692 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-20 06:04:04,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70840 states. [2021-11-20 06:04:05,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70840 to 69511. [2021-11-20 06:04:05,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69511 states, 69510 states have (on average 1.1229894979139692) internal successors, (78059), 69510 states have internal predecessors, (78059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:05,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69511 states to 69511 states and 78059 transitions. [2021-11-20 06:04:05,919 INFO L78 Accepts]: Start accepts. Automaton has 69511 states and 78059 transitions. Word has length 314 [2021-11-20 06:04:05,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:04:05,921 INFO L470 AbstractCegarLoop]: Abstraction has 69511 states and 78059 transitions. [2021-11-20 06:04:05,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:05,922 INFO L276 IsEmpty]: Start isEmpty. Operand 69511 states and 78059 transitions. [2021-11-20 06:04:05,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2021-11-20 06:04:05,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:04:05,931 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:04:05,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 06:04:05,932 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:04:05,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:04:05,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1085335230, now seen corresponding path program 1 times [2021-11-20 06:04:05,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:04:05,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058008146] [2021-11-20 06:04:05,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:05,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:04:06,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:06,430 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 328 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-20 06:04:06,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:04:06,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058008146] [2021-11-20 06:04:06,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058008146] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:04:06,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:04:06,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:04:06,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320655496] [2021-11-20 06:04:06,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:04:06,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:04:06,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:04:06,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:04:06,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:04:06,434 INFO L87 Difference]: Start difference. First operand 69511 states and 78059 transitions. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:09,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:04:09,212 INFO L93 Difference]: Finished difference Result 149691 states and 168126 transitions. [2021-11-20 06:04:09,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:04:09,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 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 329 [2021-11-20 06:04:09,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:04:09,317 INFO L225 Difference]: With dead ends: 149691 [2021-11-20 06:04:09,317 INFO L226 Difference]: Without dead ends: 80182 [2021-11-20 06:04:09,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:04:09,356 INFO L933 BasicCegarLoop]: 706 mSDtfsCounter, 365 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:04:09,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 769 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-20 06:04:09,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80182 states. [2021-11-20 06:04:10,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80182 to 79319. [2021-11-20 06:04:10,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79319 states, 79318 states have (on average 1.1088781865402557) internal successors, (87954), 79318 states have internal predecessors, (87954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:10,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79319 states to 79319 states and 87954 transitions. [2021-11-20 06:04:10,949 INFO L78 Accepts]: Start accepts. Automaton has 79319 states and 87954 transitions. Word has length 329 [2021-11-20 06:04:10,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:04:10,964 INFO L470 AbstractCegarLoop]: Abstraction has 79319 states and 87954 transitions. [2021-11-20 06:04:10,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:10,965 INFO L276 IsEmpty]: Start isEmpty. Operand 79319 states and 87954 transitions. [2021-11-20 06:04:10,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-11-20 06:04:10,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:04:10,972 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:04:10,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 06:04:10,973 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:04:10,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:04:10,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1319027679, now seen corresponding path program 1 times [2021-11-20 06:04:10,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:04:10,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407393875] [2021-11-20 06:04:10,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:10,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:04:11,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:11,208 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:04:11,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:04:11,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407393875] [2021-11-20 06:04:11,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407393875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:04:11,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765871853] [2021-11-20 06:04:11,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:11,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:04:11,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:04:11,212 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:04:11,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:04:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:11,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:04:11,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:04:12,476 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:04:12,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:04:16,427 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:04:16,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765871853] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:04:16,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:04:16,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-20 06:04:16,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217522793] [2021-11-20 06:04:16,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:04:16,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:04:16,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:04:16,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:04:16,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:04:16,433 INFO L87 Difference]: Start difference. First operand 79319 states and 87954 transitions. Second operand has 7 states, 7 states have (on average 104.71428571428571) internal successors, (733), 6 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:28,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:04:28,385 INFO L93 Difference]: Finished difference Result 195340 states and 215638 transitions. [2021-11-20 06:04:28,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:04:28,386 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 104.71428571428571) internal successors, (733), 6 states have internal predecessors, (733), 0 states have call successors, (0), 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 340 [2021-11-20 06:04:28,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:04:28,522 INFO L225 Difference]: With dead ends: 195340 [2021-11-20 06:04:28,522 INFO L226 Difference]: Without dead ends: 113465 [2021-11-20 06:04:28,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 676 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:04:28,545 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 1442 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 9263 mSolverCounterSat, 849 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1442 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 10112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 849 IncrementalHoareTripleChecker+Valid, 9263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:04:28,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1442 Valid, 350 Invalid, 10112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [849 Valid, 9263 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time] [2021-11-20 06:04:28,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113465 states. [2021-11-20 06:04:30,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113465 to 97183. [2021-11-20 06:04:30,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97183 states, 97182 states have (on average 1.0952851351073245) internal successors, (106442), 97182 states have internal predecessors, (106442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:30,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97183 states to 97183 states and 106442 transitions. [2021-11-20 06:04:30,307 INFO L78 Accepts]: Start accepts. Automaton has 97183 states and 106442 transitions. Word has length 340 [2021-11-20 06:04:30,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:04:30,307 INFO L470 AbstractCegarLoop]: Abstraction has 97183 states and 106442 transitions. [2021-11-20 06:04:30,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 104.71428571428571) internal successors, (733), 6 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:30,308 INFO L276 IsEmpty]: Start isEmpty. Operand 97183 states and 106442 transitions. [2021-11-20 06:04:30,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2021-11-20 06:04:30,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:04:30,318 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:04:30,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:04:30,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 06:04:30,544 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:04:30,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:04:30,545 INFO L85 PathProgramCache]: Analyzing trace with hash -64556604, now seen corresponding path program 1 times [2021-11-20 06:04:30,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:04:30,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980244766] [2021-11-20 06:04:30,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:30,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:04:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:30,700 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 418 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-20 06:04:30,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:04:30,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980244766] [2021-11-20 06:04:30,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980244766] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:04:30,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:04:30,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:04:30,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378094099] [2021-11-20 06:04:30,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:04:30,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:04:30,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:04:30,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:04:30,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:04:30,703 INFO L87 Difference]: Start difference. First operand 97183 states and 106442 transitions. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:33,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:04:33,698 INFO L93 Difference]: Finished difference Result 199051 states and 218123 transitions. [2021-11-20 06:04:33,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:04:33,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 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 382 [2021-11-20 06:04:33,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:04:33,852 INFO L225 Difference]: With dead ends: 199051 [2021-11-20 06:04:33,852 INFO L226 Difference]: Without dead ends: 102295 [2021-11-20 06:04:33,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:04:33,904 INFO L933 BasicCegarLoop]: 682 mSDtfsCounter, 405 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:04:33,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 729 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 06:04:34,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102295 states. [2021-11-20 06:04:35,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102295 to 89928. [2021-11-20 06:04:35,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89928 states, 89927 states have (on average 1.093965105029635) internal successors, (98377), 89927 states have internal predecessors, (98377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:35,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89928 states to 89928 states and 98377 transitions. [2021-11-20 06:04:35,828 INFO L78 Accepts]: Start accepts. Automaton has 89928 states and 98377 transitions. Word has length 382 [2021-11-20 06:04:35,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:04:35,829 INFO L470 AbstractCegarLoop]: Abstraction has 89928 states and 98377 transitions. [2021-11-20 06:04:35,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:35,829 INFO L276 IsEmpty]: Start isEmpty. Operand 89928 states and 98377 transitions. [2021-11-20 06:04:35,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-11-20 06:04:35,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:04:35,843 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:04:35,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 06:04:35,843 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:04:35,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:04:35,843 INFO L85 PathProgramCache]: Analyzing trace with hash -943368672, now seen corresponding path program 1 times [2021-11-20 06:04:35,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:04:35,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677703624] [2021-11-20 06:04:35,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:35,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:04:35,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:36,038 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 405 proven. 0 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2021-11-20 06:04:36,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:04:36,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677703624] [2021-11-20 06:04:36,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677703624] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:04:36,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:04:36,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:04:36,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520299603] [2021-11-20 06:04:36,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:04:36,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:04:36,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:04:36,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:04:36,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:04:36,042 INFO L87 Difference]: Start difference. First operand 89928 states and 98377 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:37,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:04:37,857 INFO L93 Difference]: Finished difference Result 177716 states and 194414 transitions. [2021-11-20 06:04:37,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:04:37,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 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 433 [2021-11-20 06:04:37,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:04:37,950 INFO L225 Difference]: With dead ends: 177716 [2021-11-20 06:04:37,950 INFO L226 Difference]: Without dead ends: 88214 [2021-11-20 06:04:37,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:04:37,978 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 616 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:04:37,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 95 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 06:04:38,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88214 states. [2021-11-20 06:04:39,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88214 to 88205. [2021-11-20 06:04:39,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88205 states, 88204 states have (on average 1.0933291007210557) internal successors, (96436), 88204 states have internal predecessors, (96436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:39,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88205 states to 88205 states and 96436 transitions. [2021-11-20 06:04:39,436 INFO L78 Accepts]: Start accepts. Automaton has 88205 states and 96436 transitions. Word has length 433 [2021-11-20 06:04:39,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:04:39,436 INFO L470 AbstractCegarLoop]: Abstraction has 88205 states and 96436 transitions. [2021-11-20 06:04:39,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:04:39,437 INFO L276 IsEmpty]: Start isEmpty. Operand 88205 states and 96436 transitions. [2021-11-20 06:04:39,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2021-11-20 06:04:39,448 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:04:39,448 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:04:39,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 06:04:39,449 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:04:39,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:04:39,449 INFO L85 PathProgramCache]: Analyzing trace with hash 340482704, now seen corresponding path program 1 times [2021-11-20 06:04:39,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:04:39,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043394129] [2021-11-20 06:04:39,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:39,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:04:39,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 370 proven. 52 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-11-20 06:04:40,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:04:40,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043394129] [2021-11-20 06:04:40,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043394129] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:04:40,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8020561] [2021-11-20 06:04:40,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:40,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:04:40,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:04:40,252 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:04:40,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:04:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:40,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:04:40,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:04:41,600 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 433 proven. 82 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-20 06:04:41,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:04:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 433 proven. 82 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-20 06:04:43,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8020561] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:04:43,499 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:04:43,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2021-11-20 06:04:43,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748915067] [2021-11-20 06:04:43,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:04:43,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:04:43,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:04:43,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:04:43,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:04:43,503 INFO L87 Difference]: Start difference. First operand 88205 states and 96436 transitions. Second operand has 9 states, 9 states have (on average 83.22222222222223) internal successors, (749), 9 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:05:01,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:01,306 INFO L93 Difference]: Finished difference Result 220726 states and 240667 transitions. [2021-11-20 06:05:01,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 06:05:01,306 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 83.22222222222223) internal successors, (749), 9 states have internal predecessors, (749), 0 states have call successors, (0), 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 434 [2021-11-20 06:05:01,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:01,436 INFO L225 Difference]: With dead ends: 220726 [2021-11-20 06:05:01,436 INFO L226 Difference]: Without dead ends: 131246 [2021-11-20 06:05:01,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 880 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:05:01,469 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 10938 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 13185 mSolverCounterSat, 3033 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10938 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 16218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3033 IncrementalHoareTripleChecker+Valid, 13185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:01,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10938 Valid, 370 Invalid, 16218 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3033 Valid, 13185 Invalid, 0 Unknown, 0 Unchecked, 16.5s Time] [2021-11-20 06:05:01,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131246 states. [2021-11-20 06:05:03,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131246 to 106494. [2021-11-20 06:05:03,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106494 states, 106493 states have (on average 1.0851793075601213) internal successors, (115564), 106493 states have internal predecessors, (115564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:05:03,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106494 states to 106494 states and 115564 transitions. [2021-11-20 06:05:03,510 INFO L78 Accepts]: Start accepts. Automaton has 106494 states and 115564 transitions. Word has length 434 [2021-11-20 06:05:03,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:03,530 INFO L470 AbstractCegarLoop]: Abstraction has 106494 states and 115564 transitions. [2021-11-20 06:05:03,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 83.22222222222223) internal successors, (749), 9 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:05:03,531 INFO L276 IsEmpty]: Start isEmpty. Operand 106494 states and 115564 transitions. [2021-11-20 06:05:03,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2021-11-20 06:05:03,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:03,562 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:03,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:05:03,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1ba2a46-36bb-41f5-b9ca-5fc70e8a1901/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:03,780 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:03,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:03,781 INFO L85 PathProgramCache]: Analyzing trace with hash -2018105007, now seen corresponding path program 1 times [2021-11-20 06:05:03,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:03,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049637283] [2021-11-20 06:05:03,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:03,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:04,002 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 298 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 06:05:04,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:04,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049637283] [2021-11-20 06:05:04,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049637283] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:04,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:05:04,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:05:04,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253873119] [2021-11-20 06:05:04,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:04,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:05:04,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:04,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:05:04,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:05:04,005 INFO L87 Difference]: Start difference. First operand 106494 states and 115564 transitions. Second operand has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:05:06,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:06,396 INFO L93 Difference]: Finished difference Result 208729 states and 226573 transitions. [2021-11-20 06:05:06,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:05:06,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 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 523 [2021-11-20 06:05:06,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:06,512 INFO L225 Difference]: With dead ends: 208729 [2021-11-20 06:05:06,512 INFO L226 Difference]: Without dead ends: 103087 [2021-11-20 06:05:06,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:05:06,542 INFO L933 BasicCegarLoop]: 627 mSDtfsCounter, 404 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:06,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 663 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-20 06:05:06,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103087 states. [2021-11-20 06:05:07,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103087 to 102231. [2021-11-20 06:05:07,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102231 states, 102230 states have (on average 1.0784603345397632) internal successors, (110251), 102230 states have internal predecessors, (110251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:05:08,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102231 states to 102231 states and 110251 transitions. [2021-11-20 06:05:08,037 INFO L78 Accepts]: Start accepts. Automaton has 102231 states and 110251 transitions. Word has length 523 [2021-11-20 06:05:08,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:08,038 INFO L470 AbstractCegarLoop]: Abstraction has 102231 states and 110251 transitions. [2021-11-20 06:05:08,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:05:08,038 INFO L276 IsEmpty]: Start isEmpty. Operand 102231 states and 110251 transitions. [2021-11-20 06:05:08,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2021-11-20 06:05:08,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:08,049 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:08,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 06:05:08,050 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:08,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:08,050 INFO L85 PathProgramCache]: Analyzing trace with hash 112782539, now seen corresponding path program 1 times [2021-11-20 06:05:08,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:08,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192558819] [2021-11-20 06:05:08,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:08,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:08,745 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 336 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-20 06:05:08,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:08,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192558819] [2021-11-20 06:05:08,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192558819] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:08,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:05:08,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:05:08,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314216421] [2021-11-20 06:05:08,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:08,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:05:08,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:08,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:05:08,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:05:08,749 INFO L87 Difference]: Start difference. First operand 102231 states and 110251 transitions. Second operand has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:05:10,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:10,963 INFO L93 Difference]: Finished difference Result 208735 states and 225182 transitions. [2021-11-20 06:05:10,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:05:10,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 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 550 [2021-11-20 06:05:10,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:11,078 INFO L225 Difference]: With dead ends: 208735 [2021-11-20 06:05:11,078 INFO L226 Difference]: Without dead ends: 106931 [2021-11-20 06:05:11,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:05:11,494 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 399 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:11,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 222 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 1161 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 06:05:11,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106931 states. [2021-11-20 06:05:12,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106931 to 97125. [2021-11-20 06:05:12,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97125 states, 97124 states have (on average 1.0780342654750628) internal successors, (104703), 97124 states have internal predecessors, (104703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:05:12,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97125 states to 97125 states and 104703 transitions. [2021-11-20 06:05:12,798 INFO L78 Accepts]: Start accepts. Automaton has 97125 states and 104703 transitions. Word has length 550 [2021-11-20 06:05:12,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:12,798 INFO L470 AbstractCegarLoop]: Abstraction has 97125 states and 104703 transitions. [2021-11-20 06:05:12,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:05:12,799 INFO L276 IsEmpty]: Start isEmpty. Operand 97125 states and 104703 transitions. [2021-11-20 06:05:12,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2021-11-20 06:05:12,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:12,818 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:12,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 06:05:12,818 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:12,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:12,819 INFO L85 PathProgramCache]: Analyzing trace with hash 817338510, now seen corresponding path program 1 times [2021-11-20 06:05:12,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:12,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827267597] [2021-11-20 06:05:12,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:12,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:12,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 827 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-11-20 06:05:13,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:13,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827267597] [2021-11-20 06:05:13,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827267597] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:13,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:05:13,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:05:13,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106477925] [2021-11-20 06:05:13,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:13,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:05:13,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:13,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:05:13,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:05:13,113 INFO L87 Difference]: Start difference. First operand 97125 states and 104703 transitions. Second operand has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:05:17,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:17,006 INFO L93 Difference]: Finished difference Result 218099 states and 235252 transitions. [2021-11-20 06:05:17,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:05:17,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 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 594 [2021-11-20 06:05:17,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:17,130 INFO L225 Difference]: With dead ends: 218099 [2021-11-20 06:05:17,130 INFO L226 Difference]: Without dead ends: 121826 [2021-11-20 06:05:17,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:05:17,176 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 744 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2283 mSolverCounterSat, 452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 744 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 2735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 452 IncrementalHoareTripleChecker+Valid, 2283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:17,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [744 Valid, 167 Invalid, 2735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [452 Valid, 2283 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-20 06:05:17,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121826 states. [2021-11-20 06:05:18,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121826 to 116718. [2021-11-20 06:05:18,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116718 states, 116717 states have (on average 1.0742736705021547) internal successors, (125386), 116717 states have internal predecessors, (125386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:05:19,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116718 states to 116718 states and 125386 transitions. [2021-11-20 06:05:19,119 INFO L78 Accepts]: Start accepts. Automaton has 116718 states and 125386 transitions. Word has length 594 [2021-11-20 06:05:19,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:19,120 INFO L470 AbstractCegarLoop]: Abstraction has 116718 states and 125386 transitions. [2021-11-20 06:05:19,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:05:19,120 INFO L276 IsEmpty]: Start isEmpty. Operand 116718 states and 125386 transitions. [2021-11-20 06:05:19,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2021-11-20 06:05:19,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:19,133 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:19,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 06:05:19,133 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:19,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:19,134 INFO L85 PathProgramCache]: Analyzing trace with hash -958629990, now seen corresponding path program 1 times [2021-11-20 06:05:19,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:19,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702852893] [2021-11-20 06:05:19,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:19,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:19,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 465 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-20 06:05:19,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:19,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702852893] [2021-11-20 06:05:19,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702852893] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:19,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:05:19,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:05:19,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041707610] [2021-11-20 06:05:19,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:19,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:05:19,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:19,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:05:19,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:05:19,339 INFO L87 Difference]: Start difference. First operand 116718 states and 125386 transitions. Second operand has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:05:21,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:21,923 INFO L93 Difference]: Finished difference Result 235978 states and 253227 transitions. [2021-11-20 06:05:21,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:05:21,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 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 606 [2021-11-20 06:05:21,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:22,065 INFO L225 Difference]: With dead ends: 235978 [2021-11-20 06:05:22,065 INFO L226 Difference]: Without dead ends: 120112 [2021-11-20 06:05:22,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:05:22,109 INFO L933 BasicCegarLoop]: 590 mSDtfsCounter, 495 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:22,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 619 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 06:05:22,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120112 states. [2021-11-20 06:05:24,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120112 to 117983. [2021-11-20 06:05:24,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117983 states, 117982 states have (on average 1.0671966910206643) internal successors, (125910), 117982 states have internal predecessors, (125910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:05:24,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117983 states to 117983 states and 125910 transitions. [2021-11-20 06:05:24,348 INFO L78 Accepts]: Start accepts. Automaton has 117983 states and 125910 transitions. Word has length 606 [2021-11-20 06:05:24,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:24,349 INFO L470 AbstractCegarLoop]: Abstraction has 117983 states and 125910 transitions. [2021-11-20 06:05:24,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:05:24,349 INFO L276 IsEmpty]: Start isEmpty. Operand 117983 states and 125910 transitions. [2021-11-20 06:05:24,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2021-11-20 06:05:24,358 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:24,358 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:24,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-20 06:05:24,359 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:24,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:24,359 INFO L85 PathProgramCache]: Analyzing trace with hash -321467080, now seen corresponding path program 1 times [2021-11-20 06:05:24,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:24,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360410304] [2021-11-20 06:05:24,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:24,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:24,555 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 651 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-20 06:05:24,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:24,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360410304] [2021-11-20 06:05:24,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360410304] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:24,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:05:24,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:05:24,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299270698] [2021-11-20 06:05:24,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:24,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:05:24,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:24,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:05:24,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:05:24,558 INFO L87 Difference]: Start difference. First operand 117983 states and 125910 transitions. Second operand has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)