./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label16.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem03_label16.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 b3ca7ac045e48d38881d30e6a93ef4c7dacfed0b5d9d8607f5d28bf43102d8b7 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 03:30:33,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 03:30:33,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 03:30:33,773 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 03:30:33,774 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 03:30:33,775 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 03:30:33,776 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 03:30:33,778 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 03:30:33,780 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 03:30:33,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 03:30:33,784 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 03:30:33,785 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 03:30:33,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 03:30:33,787 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 03:30:33,794 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 03:30:33,795 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 03:30:33,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 03:30:33,796 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 03:30:33,797 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 03:30:33,798 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 03:30:33,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 03:30:33,801 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 03:30:33,803 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 03:30:33,803 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 03:30:33,812 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 03:30:33,814 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 03:30:33,814 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 03:30:33,815 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 03:30:33,816 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 03:30:33,816 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 03:30:33,816 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 03:30:33,817 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 03:30:33,818 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 03:30:33,819 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 03:30:33,820 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 03:30:33,820 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 03:30:33,821 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 03:30:33,821 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 03:30:33,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 03:30:33,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 03:30:33,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 03:30:33,823 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 03:30:33,849 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 03:30:33,849 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 03:30:33,850 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 03:30:33,850 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 03:30:33,850 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 03:30:33,851 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 03:30:33,851 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 03:30:33,851 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 03:30:33,851 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 03:30:33,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 03:30:33,852 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 03:30:33,852 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 03:30:33,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 03:30:33,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 03:30:33,853 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 03:30:33,853 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 03:30:33,853 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 03:30:33,853 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 03:30:33,853 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 03:30:33,853 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 03:30:33,853 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 03:30:33,854 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 03:30:33,854 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 03:30:33,854 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 03:30:33,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 03:30:33,854 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 03:30:33,854 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 03:30:33,854 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 03:30:33,855 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 03:30:33,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 03:30:33,855 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 03:30:33,855 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 03:30:33,855 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 03:30:33,856 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 03:30:33,856 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3ca7ac045e48d38881d30e6a93ef4c7dacfed0b5d9d8607f5d28bf43102d8b7 [2021-12-17 03:30:34,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 03:30:34,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 03:30:34,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 03:30:34,094 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 03:30:34,095 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 03:30:34,096 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label16.c [2021-12-17 03:30:34,136 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8de5d4ae9/15b27d71dee54fe0af16f7b262d1da33/FLAGdd957e8f7 [2021-12-17 03:30:34,547 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 03:30:34,547 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label16.c [2021-12-17 03:30:34,560 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8de5d4ae9/15b27d71dee54fe0af16f7b262d1da33/FLAGdd957e8f7 [2021-12-17 03:30:34,876 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8de5d4ae9/15b27d71dee54fe0af16f7b262d1da33 [2021-12-17 03:30:34,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 03:30:34,880 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 03:30:34,882 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 03:30:34,883 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 03:30:34,885 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 03:30:34,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:30:34" (1/1) ... [2021-12-17 03:30:34,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5081185f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:30:34, skipping insertion in model container [2021-12-17 03:30:34,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:30:34" (1/1) ... [2021-12-17 03:30:34,891 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 03:30:34,973 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 03:30:35,409 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label16.c[56490,56503] [2021-12-17 03:30:35,437 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 03:30:35,443 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 03:30:35,545 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label16.c[56490,56503] [2021-12-17 03:30:35,553 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 03:30:35,564 INFO L208 MainTranslator]: Completed translation [2021-12-17 03:30:35,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:30:35 WrapperNode [2021-12-17 03:30:35,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 03:30:35,566 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 03:30:35,566 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 03:30:35,566 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 03:30:35,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:30:35" (1/1) ... [2021-12-17 03:30:35,594 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:30:35" (1/1) ... [2021-12-17 03:30:35,652 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-12-17 03:30:35,652 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 03:30:35,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 03:30:35,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 03:30:35,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 03:30:35,658 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:30:35" (1/1) ... [2021-12-17 03:30:35,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:30:35" (1/1) ... [2021-12-17 03:30:35,664 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:30:35" (1/1) ... [2021-12-17 03:30:35,664 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:30:35" (1/1) ... [2021-12-17 03:30:35,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:30:35" (1/1) ... [2021-12-17 03:30:35,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:30:35" (1/1) ... [2021-12-17 03:30:35,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:30:35" (1/1) ... [2021-12-17 03:30:35,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 03:30:35,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 03:30:35,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 03:30:35,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 03:30:35,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:30:35" (1/1) ... [2021-12-17 03:30:35,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 03:30:35,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:30:35,788 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 03:30:35,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 03:30:35,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 03:30:35,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 03:30:35,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 03:30:35,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 03:30:35,876 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 03:30:35,877 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 03:30:37,139 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 03:30:37,167 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 03:30:37,168 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 03:30:37,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:30:37 BoogieIcfgContainer [2021-12-17 03:30:37,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 03:30:37,171 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 03:30:37,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 03:30:37,174 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 03:30:37,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 03:30:34" (1/3) ... [2021-12-17 03:30:37,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c8c3ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:30:37, skipping insertion in model container [2021-12-17 03:30:37,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:30:35" (2/3) ... [2021-12-17 03:30:37,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c8c3ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:30:37, skipping insertion in model container [2021-12-17 03:30:37,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:30:37" (3/3) ... [2021-12-17 03:30:37,177 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label16.c [2021-12-17 03:30:37,180 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 03:30:37,180 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 03:30:37,223 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 03:30:37,229 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 03:30:37,229 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 03:30:37,251 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:37,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-17 03:30:37,265 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:30:37,265 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:30:37,266 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:30:37,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:30:37,269 INFO L85 PathProgramCache]: Analyzing trace with hash 812227147, now seen corresponding path program 1 times [2021-12-17 03:30:37,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:30:37,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800870726] [2021-12-17 03:30:37,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:37,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:30:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:37,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:30:37,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:30:37,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800870726] [2021-12-17 03:30:37,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800870726] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:30:37,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:30:37,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:30:37,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002567084] [2021-12-17 03:30:37,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:30:37,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:30:37,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:30:37,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:30:37,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:30:37,643 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 55.0) internal successors, (165), 2 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:38,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:30:38,480 INFO L93 Difference]: Finished difference Result 835 states and 1478 transitions. [2021-12-17 03:30:38,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:30:38,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 0 states have call successors, (0), 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 165 [2021-12-17 03:30:38,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:30:38,491 INFO L225 Difference]: With dead ends: 835 [2021-12-17 03:30:38,491 INFO L226 Difference]: Without dead ends: 456 [2021-12-17 03:30:38,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:30:38,496 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 123 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 03:30:38,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 161 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 03:30:38,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-12-17 03:30:38,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 451. [2021-12-17 03:30:38,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.5622222222222222) internal successors, (703), 450 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:38,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 703 transitions. [2021-12-17 03:30:38,533 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 703 transitions. Word has length 165 [2021-12-17 03:30:38,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:30:38,534 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 703 transitions. [2021-12-17 03:30:38,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:38,534 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 703 transitions. [2021-12-17 03:30:38,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-12-17 03:30:38,536 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:30:38,537 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 03:30:38,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 03:30:38,537 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:30:38,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:30:38,538 INFO L85 PathProgramCache]: Analyzing trace with hash -733339267, now seen corresponding path program 1 times [2021-12-17 03:30:38,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:30:38,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226077119] [2021-12-17 03:30:38,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:38,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:30:38,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:38,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:30:38,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:30:38,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226077119] [2021-12-17 03:30:38,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226077119] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:30:38,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:30:38,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:30:38,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765460914] [2021-12-17 03:30:38,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:30:38,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:30:38,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:30:38,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:30:38,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:30:38,597 INFO L87 Difference]: Start difference. First operand 451 states and 703 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:39,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:30:39,175 INFO L93 Difference]: Finished difference Result 1337 states and 2091 transitions. [2021-12-17 03:30:39,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:30:39,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 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 171 [2021-12-17 03:30:39,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:30:39,182 INFO L225 Difference]: With dead ends: 1337 [2021-12-17 03:30:39,182 INFO L226 Difference]: Without dead ends: 888 [2021-12-17 03:30:39,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:30:39,184 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 283 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:30:39,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 150 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:30:39,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-12-17 03:30:39,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 880. [2021-12-17 03:30:39,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 1.5415244596131967) internal successors, (1355), 879 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:39,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1355 transitions. [2021-12-17 03:30:39,235 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1355 transitions. Word has length 171 [2021-12-17 03:30:39,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:30:39,235 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 1355 transitions. [2021-12-17 03:30:39,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:39,235 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1355 transitions. [2021-12-17 03:30:39,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-17 03:30:39,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:30:39,240 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 03:30:39,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 03:30:39,240 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:30:39,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:30:39,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1955058511, now seen corresponding path program 1 times [2021-12-17 03:30:39,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:30:39,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626241183] [2021-12-17 03:30:39,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:39,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:30:39,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:39,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:30:39,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:30:39,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626241183] [2021-12-17 03:30:39,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626241183] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:30:39,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:30:39,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:30:39,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205799490] [2021-12-17 03:30:39,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:30:39,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:30:39,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:30:39,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:30:39,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:30:39,342 INFO L87 Difference]: Start difference. First operand 880 states and 1355 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:39,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:30:39,930 INFO L93 Difference]: Finished difference Result 2598 states and 4011 transitions. [2021-12-17 03:30:39,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:30:39,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 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 175 [2021-12-17 03:30:39,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:30:39,936 INFO L225 Difference]: With dead ends: 2598 [2021-12-17 03:30:39,936 INFO L226 Difference]: Without dead ends: 1720 [2021-12-17 03:30:39,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:30:39,938 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 219 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:30:39,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 144 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:30:39,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1720 states. [2021-12-17 03:30:39,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1720 to 1708. [2021-12-17 03:30:39,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 1.4915055653192735) internal successors, (2546), 1707 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:39,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 2546 transitions. [2021-12-17 03:30:39,963 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 2546 transitions. Word has length 175 [2021-12-17 03:30:39,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:30:39,963 INFO L470 AbstractCegarLoop]: Abstraction has 1708 states and 2546 transitions. [2021-12-17 03:30:39,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:39,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 2546 transitions. [2021-12-17 03:30:39,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-17 03:30:39,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:30:39,966 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-17 03:30:39,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 03:30:39,966 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:30:39,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:30:39,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1374340711, now seen corresponding path program 1 times [2021-12-17 03:30:39,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:30:39,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424377864] [2021-12-17 03:30:39,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:39,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:30:39,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:40,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 03:30:40,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:30:40,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424377864] [2021-12-17 03:30:40,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424377864] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:30:40,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:30:40,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:30:40,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985052653] [2021-12-17 03:30:40,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:30:40,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:30:40,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:30:40,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:30:40,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:30:40,011 INFO L87 Difference]: Start difference. First operand 1708 states and 2546 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:40,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:30:40,574 INFO L93 Difference]: Finished difference Result 5039 states and 7516 transitions. [2021-12-17 03:30:40,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:30:40,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 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 177 [2021-12-17 03:30:40,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:30:40,583 INFO L225 Difference]: With dead ends: 5039 [2021-12-17 03:30:40,583 INFO L226 Difference]: Without dead ends: 3333 [2021-12-17 03:30:40,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:30:40,585 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 214 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:30:40,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 195 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:30:40,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3333 states. [2021-12-17 03:30:40,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3333 to 3333. [2021-12-17 03:30:40,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3333 states, 3332 states have (on average 1.3214285714285714) internal successors, (4403), 3332 states have internal predecessors, (4403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:40,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3333 states to 3333 states and 4403 transitions. [2021-12-17 03:30:40,626 INFO L78 Accepts]: Start accepts. Automaton has 3333 states and 4403 transitions. Word has length 177 [2021-12-17 03:30:40,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:30:40,627 INFO L470 AbstractCegarLoop]: Abstraction has 3333 states and 4403 transitions. [2021-12-17 03:30:40,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:40,627 INFO L276 IsEmpty]: Start isEmpty. Operand 3333 states and 4403 transitions. [2021-12-17 03:30:40,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-12-17 03:30:40,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:30:40,631 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:30:40,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 03:30:40,631 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:30:40,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:30:40,631 INFO L85 PathProgramCache]: Analyzing trace with hash 243508723, now seen corresponding path program 1 times [2021-12-17 03:30:40,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:30:40,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317555435] [2021-12-17 03:30:40,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:40,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:30:40,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:40,675 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 03:30:40,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:30:40,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317555435] [2021-12-17 03:30:40,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317555435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:30:40,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:30:40,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:30:40,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116821388] [2021-12-17 03:30:40,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:30:40,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:30:40,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:30:40,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:30:40,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:30:40,677 INFO L87 Difference]: Start difference. First operand 3333 states and 4403 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:41,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:30:41,271 INFO L93 Difference]: Finished difference Result 9128 states and 12136 transitions. [2021-12-17 03:30:41,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:30:41,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 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 186 [2021-12-17 03:30:41,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:30:41,286 INFO L225 Difference]: With dead ends: 9128 [2021-12-17 03:30:41,286 INFO L226 Difference]: Without dead ends: 5797 [2021-12-17 03:30:41,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:30:41,290 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 224 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:30:41,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 369 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:30:41,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5797 states. [2021-12-17 03:30:41,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5797 to 5385. [2021-12-17 03:30:41,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5385 states, 5384 states have (on average 1.2667161961367013) internal successors, (6820), 5384 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:41,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5385 states to 5385 states and 6820 transitions. [2021-12-17 03:30:41,361 INFO L78 Accepts]: Start accepts. Automaton has 5385 states and 6820 transitions. Word has length 186 [2021-12-17 03:30:41,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:30:41,361 INFO L470 AbstractCegarLoop]: Abstraction has 5385 states and 6820 transitions. [2021-12-17 03:30:41,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:41,362 INFO L276 IsEmpty]: Start isEmpty. Operand 5385 states and 6820 transitions. [2021-12-17 03:30:41,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 03:30:41,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:30:41,367 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:30:41,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 03:30:41,368 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:30:41,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:30:41,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1271825959, now seen corresponding path program 1 times [2021-12-17 03:30:41,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:30:41,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809110808] [2021-12-17 03:30:41,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:41,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:30:41,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:41,416 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 03:30:41,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:30:41,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809110808] [2021-12-17 03:30:41,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809110808] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:30:41,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:30:41,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:30:41,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170855551] [2021-12-17 03:30:41,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:30:41,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:30:41,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:30:41,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:30:41,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:30:41,419 INFO L87 Difference]: Start difference. First operand 5385 states and 6820 transitions. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:42,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:30:42,041 INFO L93 Difference]: Finished difference Result 12362 states and 15805 transitions. [2021-12-17 03:30:42,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:30:42,041 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 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 190 [2021-12-17 03:30:42,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:30:42,059 INFO L225 Difference]: With dead ends: 12362 [2021-12-17 03:30:42,059 INFO L226 Difference]: Without dead ends: 6979 [2021-12-17 03:30:42,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:30:42,067 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 790 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 790 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:30:42,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [790 Valid, 43 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:30:42,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6979 states. [2021-12-17 03:30:42,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6979 to 6159. [2021-12-17 03:30:42,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6159 states, 6158 states have (on average 1.247970120168886) internal successors, (7685), 6158 states have internal predecessors, (7685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:42,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6159 states to 6159 states and 7685 transitions. [2021-12-17 03:30:42,143 INFO L78 Accepts]: Start accepts. Automaton has 6159 states and 7685 transitions. Word has length 190 [2021-12-17 03:30:42,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:30:42,143 INFO L470 AbstractCegarLoop]: Abstraction has 6159 states and 7685 transitions. [2021-12-17 03:30:42,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:42,144 INFO L276 IsEmpty]: Start isEmpty. Operand 6159 states and 7685 transitions. [2021-12-17 03:30:42,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-12-17 03:30:42,150 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:30:42,150 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:30:42,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 03:30:42,150 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:30:42,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:30:42,151 INFO L85 PathProgramCache]: Analyzing trace with hash 407118670, now seen corresponding path program 1 times [2021-12-17 03:30:42,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:30:42,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749617373] [2021-12-17 03:30:42,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:42,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:30:42,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:42,201 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:30:42,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:30:42,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749617373] [2021-12-17 03:30:42,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749617373] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:30:42,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:30:42,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:30:42,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776498956] [2021-12-17 03:30:42,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:30:42,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:30:42,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:30:42,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:30:42,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:30:42,204 INFO L87 Difference]: Start difference. First operand 6159 states and 7685 transitions. Second operand has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:43,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:30:43,048 INFO L93 Difference]: Finished difference Result 13144 states and 16525 transitions. [2021-12-17 03:30:43,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:30:43,049 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 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 202 [2021-12-17 03:30:43,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:30:43,064 INFO L225 Difference]: With dead ends: 13144 [2021-12-17 03:30:43,064 INFO L226 Difference]: Without dead ends: 6987 [2021-12-17 03:30:43,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:30:43,071 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 432 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 03:30:43,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 81 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 03:30:43,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6987 states. [2021-12-17 03:30:43,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6987 to 6159. [2021-12-17 03:30:43,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6159 states, 6158 states have (on average 1.247970120168886) internal successors, (7685), 6158 states have internal predecessors, (7685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:43,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6159 states to 6159 states and 7685 transitions. [2021-12-17 03:30:43,153 INFO L78 Accepts]: Start accepts. Automaton has 6159 states and 7685 transitions. Word has length 202 [2021-12-17 03:30:43,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:30:43,154 INFO L470 AbstractCegarLoop]: Abstraction has 6159 states and 7685 transitions. [2021-12-17 03:30:43,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:43,154 INFO L276 IsEmpty]: Start isEmpty. Operand 6159 states and 7685 transitions. [2021-12-17 03:30:43,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-17 03:30:43,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:30:43,161 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:30:43,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 03:30:43,161 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:30:43,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:30:43,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1842301197, now seen corresponding path program 1 times [2021-12-17 03:30:43,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:30:43,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566242310] [2021-12-17 03:30:43,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:43,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:30:43,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:43,206 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 03:30:43,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:30:43,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566242310] [2021-12-17 03:30:43,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566242310] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:30:43,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:30:43,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:30:43,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757763986] [2021-12-17 03:30:43,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:30:43,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:30:43,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:30:43,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:30:43,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:30:43,209 INFO L87 Difference]: Start difference. First operand 6159 states and 7685 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:43,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:30:43,817 INFO L93 Difference]: Finished difference Result 17200 states and 21440 transitions. [2021-12-17 03:30:43,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:30:43,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 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 205 [2021-12-17 03:30:43,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:30:43,836 INFO L225 Difference]: With dead ends: 17200 [2021-12-17 03:30:43,836 INFO L226 Difference]: Without dead ends: 11043 [2021-12-17 03:30:43,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:30:43,842 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 205 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:30:43,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 99 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:30:43,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11043 states. [2021-12-17 03:30:43,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11043 to 11037. [2021-12-17 03:30:43,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11037 states, 11036 states have (on average 1.2147517216382748) internal successors, (13406), 11036 states have internal predecessors, (13406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:43,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11037 states to 11037 states and 13406 transitions. [2021-12-17 03:30:43,970 INFO L78 Accepts]: Start accepts. Automaton has 11037 states and 13406 transitions. Word has length 205 [2021-12-17 03:30:43,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:30:43,970 INFO L470 AbstractCegarLoop]: Abstraction has 11037 states and 13406 transitions. [2021-12-17 03:30:43,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:43,971 INFO L276 IsEmpty]: Start isEmpty. Operand 11037 states and 13406 transitions. [2021-12-17 03:30:43,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-12-17 03:30:43,982 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:30:43,983 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:30:43,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 03:30:43,983 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:30:43,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:30:43,984 INFO L85 PathProgramCache]: Analyzing trace with hash -849311687, now seen corresponding path program 1 times [2021-12-17 03:30:43,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:30:43,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076353660] [2021-12-17 03:30:43,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:43,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:30:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:44,056 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 03:30:44,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:30:44,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076353660] [2021-12-17 03:30:44,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076353660] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:30:44,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167361893] [2021-12-17 03:30:44,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:44,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:30:44,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:30:44,065 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:30:44,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 03:30:44,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:44,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:30:44,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:30:44,465 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 03:30:44,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:30:44,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167361893] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:30:44,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:30:44,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:30:44,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886927210] [2021-12-17 03:30:44,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:30:44,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:30:44,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:30:44,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:30:44,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:30:44,468 INFO L87 Difference]: Start difference. First operand 11037 states and 13406 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:45,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:30:45,094 INFO L93 Difference]: Finished difference Result 25724 states and 31737 transitions. [2021-12-17 03:30:45,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:30:45,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 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 209 [2021-12-17 03:30:45,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:30:45,114 INFO L225 Difference]: With dead ends: 25724 [2021-12-17 03:30:45,115 INFO L226 Difference]: Without dead ends: 14689 [2021-12-17 03:30:45,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:30:45,122 INFO L933 BasicCegarLoop]: 350 mSDtfsCounter, 215 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:30:45,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 371 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:30:45,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14689 states. [2021-12-17 03:30:45,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14689 to 13059. [2021-12-17 03:30:45,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13059 states, 13058 states have (on average 1.1718486751416757) internal successors, (15302), 13058 states have internal predecessors, (15302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:45,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13059 states to 13059 states and 15302 transitions. [2021-12-17 03:30:45,262 INFO L78 Accepts]: Start accepts. Automaton has 13059 states and 15302 transitions. Word has length 209 [2021-12-17 03:30:45,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:30:45,262 INFO L470 AbstractCegarLoop]: Abstraction has 13059 states and 15302 transitions. [2021-12-17 03:30:45,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:45,262 INFO L276 IsEmpty]: Start isEmpty. Operand 13059 states and 15302 transitions. [2021-12-17 03:30:45,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-12-17 03:30:45,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:30:45,273 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, 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] [2021-12-17 03:30:45,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 03:30:45,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:30:45,491 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:30:45,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:30:45,492 INFO L85 PathProgramCache]: Analyzing trace with hash -965834963, now seen corresponding path program 1 times [2021-12-17 03:30:45,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:30:45,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383888278] [2021-12-17 03:30:45,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:45,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:30:45,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:45,580 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:30:45,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:30:45,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383888278] [2021-12-17 03:30:45,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383888278] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:30:45,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:30:45,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:30:45,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583907324] [2021-12-17 03:30:45,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:30:45,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:30:45,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:30:45,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:30:45,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:30:45,583 INFO L87 Difference]: Start difference. First operand 13059 states and 15302 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:46,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:30:46,235 INFO L93 Difference]: Finished difference Result 31215 states and 36551 transitions. [2021-12-17 03:30:46,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:30:46,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 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 219 [2021-12-17 03:30:46,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:30:46,277 INFO L225 Difference]: With dead ends: 31215 [2021-12-17 03:30:46,291 INFO L226 Difference]: Without dead ends: 18564 [2021-12-17 03:30:46,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:30:46,315 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 200 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:30:46,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 160 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:30:46,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18564 states. [2021-12-17 03:30:46,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18564 to 18557. [2021-12-17 03:30:46,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18557 states, 18556 states have (on average 1.1649601207156715) internal successors, (21617), 18556 states have internal predecessors, (21617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:46,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18557 states to 18557 states and 21617 transitions. [2021-12-17 03:30:46,588 INFO L78 Accepts]: Start accepts. Automaton has 18557 states and 21617 transitions. Word has length 219 [2021-12-17 03:30:46,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:30:46,588 INFO L470 AbstractCegarLoop]: Abstraction has 18557 states and 21617 transitions. [2021-12-17 03:30:46,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:46,589 INFO L276 IsEmpty]: Start isEmpty. Operand 18557 states and 21617 transitions. [2021-12-17 03:30:46,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-12-17 03:30:46,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:30:46,605 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:30:46,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 03:30:46,605 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:30:46,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:30:46,606 INFO L85 PathProgramCache]: Analyzing trace with hash 125634467, now seen corresponding path program 1 times [2021-12-17 03:30:46,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:30:46,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506865897] [2021-12-17 03:30:46,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:46,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:30:46,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:46,743 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 03:30:46,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:30:46,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506865897] [2021-12-17 03:30:46,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506865897] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:30:46,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:30:46,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:30:46,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453017611] [2021-12-17 03:30:46,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:30:46,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:30:46,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:30:46,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:30:46,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:30:46,744 INFO L87 Difference]: Start difference. First operand 18557 states and 21617 transitions. Second operand has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:47,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:30:47,566 INFO L93 Difference]: Finished difference Result 57451 states and 67522 transitions. [2021-12-17 03:30:47,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:30:47,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 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 234 [2021-12-17 03:30:47,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:30:47,621 INFO L225 Difference]: With dead ends: 57451 [2021-12-17 03:30:47,622 INFO L226 Difference]: Without dead ends: 39709 [2021-12-17 03:30:47,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:30:47,644 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 438 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:30:47,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 435 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 03:30:47,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39709 states. [2021-12-17 03:30:48,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39709 to 38688. [2021-12-17 03:30:48,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38688 states, 38687 states have (on average 1.156150644919482) internal successors, (44728), 38687 states have internal predecessors, (44728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:48,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38688 states to 38688 states and 44728 transitions. [2021-12-17 03:30:48,167 INFO L78 Accepts]: Start accepts. Automaton has 38688 states and 44728 transitions. Word has length 234 [2021-12-17 03:30:48,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:30:48,167 INFO L470 AbstractCegarLoop]: Abstraction has 38688 states and 44728 transitions. [2021-12-17 03:30:48,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:48,168 INFO L276 IsEmpty]: Start isEmpty. Operand 38688 states and 44728 transitions. [2021-12-17 03:30:48,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-12-17 03:30:48,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:30:48,191 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-17 03:30:48,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 03:30:48,192 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:30:48,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:30:48,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1331394009, now seen corresponding path program 1 times [2021-12-17 03:30:48,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:30:48,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115952479] [2021-12-17 03:30:48,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:48,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:30:48,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:48,266 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 84 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-17 03:30:48,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:30:48,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115952479] [2021-12-17 03:30:48,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115952479] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:30:48,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250353844] [2021-12-17 03:30:48,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:48,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:30:48,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:30:48,269 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:30:48,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 03:30:48,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:48,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:30:48,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:30:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-17 03:30:48,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:30:48,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250353844] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:30:48,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:30:48,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-17 03:30:48,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587261139] [2021-12-17 03:30:48,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:30:48,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:30:48,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:30:48,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:30:48,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:30:48,822 INFO L87 Difference]: Start difference. First operand 38688 states and 44728 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:49,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:30:49,577 INFO L93 Difference]: Finished difference Result 91222 states and 106021 transitions. [2021-12-17 03:30:49,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:30:49,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 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 239 [2021-12-17 03:30:49,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:30:49,650 INFO L225 Difference]: With dead ends: 91222 [2021-12-17 03:30:49,651 INFO L226 Difference]: Without dead ends: 53350 [2021-12-17 03:30:49,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:30:49,681 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 216 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:30:49,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 108 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:30:49,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53350 states. [2021-12-17 03:30:50,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53350 to 53141. [2021-12-17 03:30:50,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53141 states, 53140 states have (on average 1.151863003387279) internal successors, (61210), 53140 states have internal predecessors, (61210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:50,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53141 states to 53141 states and 61210 transitions. [2021-12-17 03:30:50,355 INFO L78 Accepts]: Start accepts. Automaton has 53141 states and 61210 transitions. Word has length 239 [2021-12-17 03:30:50,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:30:50,355 INFO L470 AbstractCegarLoop]: Abstraction has 53141 states and 61210 transitions. [2021-12-17 03:30:50,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:50,355 INFO L276 IsEmpty]: Start isEmpty. Operand 53141 states and 61210 transitions. [2021-12-17 03:30:50,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-12-17 03:30:50,373 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:30:50,373 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:30:50,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-17 03:30:50,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-17 03:30:50,591 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:30:50,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:30:50,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1103902319, now seen corresponding path program 1 times [2021-12-17 03:30:50,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:30:50,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763857430] [2021-12-17 03:30:50,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:50,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:30:50,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:50,876 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-17 03:30:50,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:30:50,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763857430] [2021-12-17 03:30:50,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763857430] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:30:50,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:30:50,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:30:50,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422010128] [2021-12-17 03:30:50,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:30:50,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:30:50,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:30:50,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:30:50,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:30:50,879 INFO L87 Difference]: Start difference. First operand 53141 states and 61210 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:51,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:30:51,591 INFO L93 Difference]: Finished difference Result 105669 states and 121736 transitions. [2021-12-17 03:30:51,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:30:51,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 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 246 [2021-12-17 03:30:51,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:30:51,656 INFO L225 Difference]: With dead ends: 105669 [2021-12-17 03:30:51,656 INFO L226 Difference]: Without dead ends: 53344 [2021-12-17 03:30:51,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:30:51,690 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 172 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:30:51,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 156 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:30:51,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53344 states. [2021-12-17 03:30:52,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53344 to 53344. [2021-12-17 03:30:52,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53344 states, 53343 states have (on average 1.1515662786120016) internal successors, (61428), 53343 states have internal predecessors, (61428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:52,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53344 states to 53344 states and 61428 transitions. [2021-12-17 03:30:52,527 INFO L78 Accepts]: Start accepts. Automaton has 53344 states and 61428 transitions. Word has length 246 [2021-12-17 03:30:52,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:30:52,527 INFO L470 AbstractCegarLoop]: Abstraction has 53344 states and 61428 transitions. [2021-12-17 03:30:52,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:52,527 INFO L276 IsEmpty]: Start isEmpty. Operand 53344 states and 61428 transitions. [2021-12-17 03:30:52,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-12-17 03:30:52,545 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:30:52,546 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 03:30:52,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 03:30:52,546 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:30:52,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:30:52,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1166889531, now seen corresponding path program 1 times [2021-12-17 03:30:52,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:30:52,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002895494] [2021-12-17 03:30:52,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:52,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:30:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 92 proven. 6 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-17 03:30:52,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:30:52,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002895494] [2021-12-17 03:30:52,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002895494] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:30:52,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938235278] [2021-12-17 03:30:52,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:52,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:30:52,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:30:52,658 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:30:52,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 03:30:52,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:52,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:30:52,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:30:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-17 03:30:53,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:30:53,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938235278] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:30:53,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:30:53,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:30:53,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155244280] [2021-12-17 03:30:53,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:30:53,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:30:53,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:30:53,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:30:53,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:30:53,147 INFO L87 Difference]: Start difference. First operand 53344 states and 61428 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:54,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:30:54,073 INFO L93 Difference]: Finished difference Result 127611 states and 147638 transitions. [2021-12-17 03:30:54,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:30:54,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 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 249 [2021-12-17 03:30:54,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:30:54,166 INFO L225 Difference]: With dead ends: 127611 [2021-12-17 03:30:54,167 INFO L226 Difference]: Without dead ends: 75286 [2021-12-17 03:30:54,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:30:54,205 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 229 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:30:54,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 131 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:30:54,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75286 states. [2021-12-17 03:30:54,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75286 to 71013. [2021-12-17 03:30:55,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71013 states, 71012 states have (on average 1.1518334929307723) internal successors, (81794), 71012 states have internal predecessors, (81794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:55,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71013 states to 71013 states and 81794 transitions. [2021-12-17 03:30:55,281 INFO L78 Accepts]: Start accepts. Automaton has 71013 states and 81794 transitions. Word has length 249 [2021-12-17 03:30:55,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:30:55,282 INFO L470 AbstractCegarLoop]: Abstraction has 71013 states and 81794 transitions. [2021-12-17 03:30:55,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:55,282 INFO L276 IsEmpty]: Start isEmpty. Operand 71013 states and 81794 transitions. [2021-12-17 03:30:55,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-12-17 03:30:55,301 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:30:55,301 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:30:55,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-17 03:30:55,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:30:55,516 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:30:55,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:30:55,516 INFO L85 PathProgramCache]: Analyzing trace with hash 2054498010, now seen corresponding path program 1 times [2021-12-17 03:30:55,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:30:55,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501928720] [2021-12-17 03:30:55,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:55,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:30:55,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:55,631 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 99 proven. 6 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-17 03:30:55,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:30:55,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501928720] [2021-12-17 03:30:55,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501928720] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:30:55,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669230626] [2021-12-17 03:30:55,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:55,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:30:55,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:30:55,634 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:30:55,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 03:30:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:55,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 03:30:55,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:30:56,081 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-17 03:30:56,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:30:56,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669230626] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:30:56,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:30:56,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:30:56,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839502721] [2021-12-17 03:30:56,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:30:56,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:30:56,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:30:56,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:30:56,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:30:56,084 INFO L87 Difference]: Start difference. First operand 71013 states and 81794 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:57,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:30:57,180 INFO L93 Difference]: Finished difference Result 133673 states and 153722 transitions. [2021-12-17 03:30:57,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:30:57,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 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 [2021-12-17 03:30:57,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:30:57,278 INFO L225 Difference]: With dead ends: 133673 [2021-12-17 03:30:57,279 INFO L226 Difference]: Without dead ends: 63677 [2021-12-17 03:30:57,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:30:57,313 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 221 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:30:57,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 314 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:30:57,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63677 states. [2021-12-17 03:30:57,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63677 to 56768. [2021-12-17 03:30:57,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56768 states, 56767 states have (on average 1.1201226064438847) internal successors, (63586), 56767 states have internal predecessors, (63586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:58,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56768 states to 56768 states and 63586 transitions. [2021-12-17 03:30:58,018 INFO L78 Accepts]: Start accepts. Automaton has 56768 states and 63586 transitions. Word has length 253 [2021-12-17 03:30:58,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:30:58,018 INFO L470 AbstractCegarLoop]: Abstraction has 56768 states and 63586 transitions. [2021-12-17 03:30:58,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:58,019 INFO L276 IsEmpty]: Start isEmpty. Operand 56768 states and 63586 transitions. [2021-12-17 03:30:58,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-12-17 03:30:58,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:30:58,034 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 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] [2021-12-17 03:30:58,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-17 03:30:58,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-17 03:30:58,248 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:30:58,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:30:58,248 INFO L85 PathProgramCache]: Analyzing trace with hash -2077998566, now seen corresponding path program 1 times [2021-12-17 03:30:58,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:30:58,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978878019] [2021-12-17 03:30:58,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:58,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:30:58,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:58,345 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 90 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-17 03:30:58,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:30:58,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978878019] [2021-12-17 03:30:58,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978878019] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:30:58,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226834206] [2021-12-17 03:30:58,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:30:58,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:30:58,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:30:58,361 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:30:58,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 03:30:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:30:58,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 03:30:58,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:30:58,807 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 03:30:58,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:30:58,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226834206] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:30:58,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:30:58,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:30:58,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474153471] [2021-12-17 03:30:58,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:30:58,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:30:58,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:30:58,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:30:58,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:30:58,809 INFO L87 Difference]: Start difference. First operand 56768 states and 63586 transitions. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:30:59,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:30:59,443 INFO L93 Difference]: Finished difference Result 149533 states and 167065 transitions. [2021-12-17 03:30:59,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:30:59,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 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 264 [2021-12-17 03:30:59,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:30:59,548 INFO L225 Difference]: With dead ends: 149533 [2021-12-17 03:30:59,548 INFO L226 Difference]: Without dead ends: 93782 [2021-12-17 03:30:59,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:30:59,583 INFO L933 BasicCegarLoop]: 618 mSDtfsCounter, 254 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:30:59,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 875 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 03:30:59,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93782 states. [2021-12-17 03:31:00,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93782 to 90735. [2021-12-17 03:31:00,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90735 states, 90734 states have (on average 1.1072916437057774) internal successors, (100469), 90734 states have internal predecessors, (100469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:00,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90735 states to 90735 states and 100469 transitions. [2021-12-17 03:31:00,996 INFO L78 Accepts]: Start accepts. Automaton has 90735 states and 100469 transitions. Word has length 264 [2021-12-17 03:31:00,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:00,997 INFO L470 AbstractCegarLoop]: Abstraction has 90735 states and 100469 transitions. [2021-12-17 03:31:00,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:00,997 INFO L276 IsEmpty]: Start isEmpty. Operand 90735 states and 100469 transitions. [2021-12-17 03:31:01,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-12-17 03:31:01,013 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:01,013 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:01,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 03:31:01,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-17 03:31:01,223 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:01,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:01,223 INFO L85 PathProgramCache]: Analyzing trace with hash 513676373, now seen corresponding path program 1 times [2021-12-17 03:31:01,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:01,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782368344] [2021-12-17 03:31:01,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:01,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:01,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:01,319 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 92 proven. 6 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-17 03:31:01,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:01,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782368344] [2021-12-17 03:31:01,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782368344] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:31:01,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799798108] [2021-12-17 03:31:01,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:01,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:31:01,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:31:01,332 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:31:01,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 03:31:01,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:01,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 03:31:01,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:31:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-17 03:31:01,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:31:01,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799798108] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:01,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:31:01,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:31:01,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851009381] [2021-12-17 03:31:01,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:01,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:01,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:01,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:01,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:01,872 INFO L87 Difference]: Start difference. First operand 90735 states and 100469 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:03,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:03,078 INFO L93 Difference]: Finished difference Result 199194 states and 220791 transitions. [2021-12-17 03:31:03,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:03,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 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 266 [2021-12-17 03:31:03,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:03,213 INFO L225 Difference]: With dead ends: 199194 [2021-12-17 03:31:03,213 INFO L226 Difference]: Without dead ends: 108867 [2021-12-17 03:31:03,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:03,247 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 64 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:03,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 332 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:31:03,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108867 states. [2021-12-17 03:31:04,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108867 to 102708. [2021-12-17 03:31:04,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102708 states, 102707 states have (on average 1.1000710759734) internal successors, (112985), 102707 states have internal predecessors, (112985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:04,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102708 states to 102708 states and 112985 transitions. [2021-12-17 03:31:04,720 INFO L78 Accepts]: Start accepts. Automaton has 102708 states and 112985 transitions. Word has length 266 [2021-12-17 03:31:04,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:04,720 INFO L470 AbstractCegarLoop]: Abstraction has 102708 states and 112985 transitions. [2021-12-17 03:31:04,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:04,721 INFO L276 IsEmpty]: Start isEmpty. Operand 102708 states and 112985 transitions. [2021-12-17 03:31:04,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-12-17 03:31:04,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:04,743 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 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] [2021-12-17 03:31:04,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 03:31:04,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-17 03:31:04,961 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:04,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:04,962 INFO L85 PathProgramCache]: Analyzing trace with hash 660419599, now seen corresponding path program 1 times [2021-12-17 03:31:04,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:04,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118014154] [2021-12-17 03:31:04,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:04,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:04,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:05,043 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 110 proven. 6 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-17 03:31:05,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:05,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118014154] [2021-12-17 03:31:05,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118014154] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:31:05,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558665628] [2021-12-17 03:31:05,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:05,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:31:05,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:31:05,045 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:31:05,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 03:31:05,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:05,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 03:31:05,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:31:05,512 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 03:31:05,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:31:05,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558665628] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:05,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:31:05,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:31:05,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414414480] [2021-12-17 03:31:05,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:05,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:05,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:05,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:05,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:05,515 INFO L87 Difference]: Start difference. First operand 102708 states and 112985 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 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) [2021-12-17 03:31:06,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:06,835 INFO L93 Difference]: Finished difference Result 197699 states and 217539 transitions. [2021-12-17 03:31:06,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:06,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 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 267 [2021-12-17 03:31:06,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:06,961 INFO L225 Difference]: With dead ends: 197699 [2021-12-17 03:31:06,961 INFO L226 Difference]: Without dead ends: 96416 [2021-12-17 03:31:06,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:06,989 INFO L933 BasicCegarLoop]: 347 mSDtfsCounter, 195 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:06,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 367 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:31:07,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96416 states. [2021-12-17 03:31:07,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96416 to 94570. [2021-12-17 03:31:07,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94570 states, 94569 states have (on average 1.0938891179984984) internal successors, (103448), 94569 states have internal predecessors, (103448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:08,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94570 states to 94570 states and 103448 transitions. [2021-12-17 03:31:08,080 INFO L78 Accepts]: Start accepts. Automaton has 94570 states and 103448 transitions. Word has length 267 [2021-12-17 03:31:08,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:08,081 INFO L470 AbstractCegarLoop]: Abstraction has 94570 states and 103448 transitions. [2021-12-17 03:31:08,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 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) [2021-12-17 03:31:08,081 INFO L276 IsEmpty]: Start isEmpty. Operand 94570 states and 103448 transitions. [2021-12-17 03:31:08,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-12-17 03:31:08,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:08,100 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:08,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 03:31:08,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:31:08,318 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:08,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:08,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1268120137, now seen corresponding path program 1 times [2021-12-17 03:31:08,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:08,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738852989] [2021-12-17 03:31:08,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:08,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:08,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:08,379 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-17 03:31:08,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:08,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738852989] [2021-12-17 03:31:08,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738852989] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:08,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:31:08,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:31:08,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813074121] [2021-12-17 03:31:08,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:08,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:08,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:08,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:08,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:08,382 INFO L87 Difference]: Start difference. First operand 94570 states and 103448 transitions. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 2 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:09,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:09,552 INFO L93 Difference]: Finished difference Result 191191 states and 209129 transitions. [2021-12-17 03:31:09,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:09,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 2 states have internal predecessors, (245), 0 states have call successors, (0), 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 [2021-12-17 03:31:09,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:09,649 INFO L225 Difference]: With dead ends: 191191 [2021-12-17 03:31:09,649 INFO L226 Difference]: Without dead ends: 97435 [2021-12-17 03:31:09,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:09,698 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 151 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:09,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 172 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:31:09,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97435 states. [2021-12-17 03:31:10,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97435 to 95179. [2021-12-17 03:31:10,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95179 states, 95178 states have (on average 1.094349534556305) internal successors, (104158), 95178 states have internal predecessors, (104158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:11,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95179 states to 95179 states and 104158 transitions. [2021-12-17 03:31:11,003 INFO L78 Accepts]: Start accepts. Automaton has 95179 states and 104158 transitions. Word has length 278 [2021-12-17 03:31:11,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:11,004 INFO L470 AbstractCegarLoop]: Abstraction has 95179 states and 104158 transitions. [2021-12-17 03:31:11,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 2 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:11,004 INFO L276 IsEmpty]: Start isEmpty. Operand 95179 states and 104158 transitions. [2021-12-17 03:31:11,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2021-12-17 03:31:11,036 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:11,036 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 03:31:11,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 03:31:11,037 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:11,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:11,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1396368235, now seen corresponding path program 1 times [2021-12-17 03:31:11,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:11,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591615302] [2021-12-17 03:31:11,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:11,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:11,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:11,131 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 130 proven. 6 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-17 03:31:11,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:11,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591615302] [2021-12-17 03:31:11,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591615302] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:31:11,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755577676] [2021-12-17 03:31:11,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:11,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:31:11,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:31:11,133 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:31:11,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 03:31:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:11,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:31:11,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:31:12,112 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-17 03:31:12,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:31:12,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755577676] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:12,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:31:12,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:31:12,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117265537] [2021-12-17 03:31:12,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:12,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:12,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:12,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:12,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:12,115 INFO L87 Difference]: Start difference. First operand 95179 states and 104158 transitions. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:12,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:12,973 INFO L93 Difference]: Finished difference Result 189605 states and 207528 transitions. [2021-12-17 03:31:12,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:12,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 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 319 [2021-12-17 03:31:12,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:13,082 INFO L225 Difference]: With dead ends: 189605 [2021-12-17 03:31:13,082 INFO L226 Difference]: Without dead ends: 95240 [2021-12-17 03:31:13,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:13,139 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 156 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:13,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 152 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:31:13,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95240 states. [2021-12-17 03:31:14,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95240 to 94570. [2021-12-17 03:31:14,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94570 states, 94569 states have (on average 1.0926625003965358) internal successors, (103332), 94569 states have internal predecessors, (103332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:14,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94570 states to 94570 states and 103332 transitions. [2021-12-17 03:31:14,669 INFO L78 Accepts]: Start accepts. Automaton has 94570 states and 103332 transitions. Word has length 319 [2021-12-17 03:31:14,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:14,670 INFO L470 AbstractCegarLoop]: Abstraction has 94570 states and 103332 transitions. [2021-12-17 03:31:14,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:14,670 INFO L276 IsEmpty]: Start isEmpty. Operand 94570 states and 103332 transitions. [2021-12-17 03:31:14,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-12-17 03:31:14,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:14,708 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:14,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 03:31:14,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:31:14,936 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:14,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:14,937 INFO L85 PathProgramCache]: Analyzing trace with hash 104901317, now seen corresponding path program 1 times [2021-12-17 03:31:14,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:14,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678600283] [2021-12-17 03:31:14,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:14,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:14,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:15,011 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 147 proven. 6 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-12-17 03:31:15,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:15,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678600283] [2021-12-17 03:31:15,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678600283] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:31:15,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018906600] [2021-12-17 03:31:15,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:15,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:31:15,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:31:15,028 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:31:15,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 03:31:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:15,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:31:15,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:31:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 245 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-17 03:31:15,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:31:15,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018906600] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:15,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:31:15,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:31:15,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961987566] [2021-12-17 03:31:15,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:15,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:15,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:15,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:15,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:15,615 INFO L87 Difference]: Start difference. First operand 94570 states and 103332 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:16,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:16,500 INFO L93 Difference]: Finished difference Result 174728 states and 190773 transitions. [2021-12-17 03:31:16,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:16,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 340 [2021-12-17 03:31:16,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:16,604 INFO L225 Difference]: With dead ends: 174728 [2021-12-17 03:31:16,604 INFO L226 Difference]: Without dead ends: 80972 [2021-12-17 03:31:16,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:16,659 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 90 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:16,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 102 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:31:16,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80972 states. [2021-12-17 03:31:17,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80972 to 78522. [2021-12-17 03:31:17,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78522 states, 78521 states have (on average 1.0727448707988945) internal successors, (84233), 78521 states have internal predecessors, (84233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:18,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78522 states to 78522 states and 84233 transitions. [2021-12-17 03:31:18,119 INFO L78 Accepts]: Start accepts. Automaton has 78522 states and 84233 transitions. Word has length 340 [2021-12-17 03:31:18,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:18,120 INFO L470 AbstractCegarLoop]: Abstraction has 78522 states and 84233 transitions. [2021-12-17 03:31:18,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:18,120 INFO L276 IsEmpty]: Start isEmpty. Operand 78522 states and 84233 transitions. [2021-12-17 03:31:18,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-12-17 03:31:18,156 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:18,156 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:18,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 03:31:18,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:31:18,374 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:18,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:18,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1540453437, now seen corresponding path program 1 times [2021-12-17 03:31:18,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:18,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915812755] [2021-12-17 03:31:18,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:18,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:18,542 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 306 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:31:18,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:18,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915812755] [2021-12-17 03:31:18,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915812755] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:31:18,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201044740] [2021-12-17 03:31:18,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:18,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:31:18,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:31:18,548 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:31:18,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 03:31:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:18,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:31:18,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:31:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 203 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-17 03:31:19,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:31:19,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201044740] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:19,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:31:19,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-17 03:31:19,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316987681] [2021-12-17 03:31:19,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:19,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:19,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:19,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:19,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 03:31:19,142 INFO L87 Difference]: Start difference. First operand 78522 states and 84233 transitions. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 2 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:19,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:19,865 INFO L93 Difference]: Finished difference Result 223547 states and 239830 transitions. [2021-12-17 03:31:19,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:19,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 2 states have internal predecessors, (294), 0 states have call successors, (0), 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 373 [2021-12-17 03:31:19,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:20,050 INFO L225 Difference]: With dead ends: 223547 [2021-12-17 03:31:20,050 INFO L226 Difference]: Without dead ends: 145839 [2021-12-17 03:31:20,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 03:31:20,119 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 198 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:20,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 529 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 03:31:20,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145839 states. [2021-12-17 03:31:21,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145839 to 144390. [2021-12-17 03:31:22,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144390 states, 144389 states have (on average 1.0715497717970206) internal successors, (154720), 144389 states have internal predecessors, (154720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:22,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144390 states to 144390 states and 154720 transitions. [2021-12-17 03:31:22,162 INFO L78 Accepts]: Start accepts. Automaton has 144390 states and 154720 transitions. Word has length 373 [2021-12-17 03:31:22,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:22,163 INFO L470 AbstractCegarLoop]: Abstraction has 144390 states and 154720 transitions. [2021-12-17 03:31:22,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 2 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:22,163 INFO L276 IsEmpty]: Start isEmpty. Operand 144390 states and 154720 transitions. [2021-12-17 03:31:22,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2021-12-17 03:31:22,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:22,203 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:31:22,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 03:31:22,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-17 03:31:22,420 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:22,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:22,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1120257218, now seen corresponding path program 1 times [2021-12-17 03:31:22,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:22,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444277128] [2021-12-17 03:31:22,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:22,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:22,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:22,918 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 303 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-17 03:31:22,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:22,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444277128] [2021-12-17 03:31:22,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444277128] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:31:22,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017561899] [2021-12-17 03:31:22,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:22,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:31:22,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:31:22,920 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:31:22,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 03:31:23,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:23,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:31:23,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:31:23,638 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 215 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-12-17 03:31:23,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:31:23,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017561899] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:23,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:31:23,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-17 03:31:23,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214474164] [2021-12-17 03:31:23,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:23,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:23,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:23,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:23,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:23,642 INFO L87 Difference]: Start difference. First operand 144390 states and 154720 transitions. Second operand has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:24,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:24,932 INFO L93 Difference]: Finished difference Result 286807 states and 307323 transitions. [2021-12-17 03:31:24,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:24,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 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 383 [2021-12-17 03:31:24,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:25,109 INFO L225 Difference]: With dead ends: 286807 [2021-12-17 03:31:25,110 INFO L226 Difference]: Without dead ends: 142622 [2021-12-17 03:31:25,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:31:25,533 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 60 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:25,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 325 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:31:25,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142622 states. [2021-12-17 03:31:26,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142622 to 142563. [2021-12-17 03:31:26,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142563 states, 142562 states have (on average 1.0691769195157195) internal successors, (152424), 142562 states have internal predecessors, (152424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:27,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142563 states to 142563 states and 152424 transitions. [2021-12-17 03:31:27,151 INFO L78 Accepts]: Start accepts. Automaton has 142563 states and 152424 transitions. Word has length 383 [2021-12-17 03:31:27,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:31:27,151 INFO L470 AbstractCegarLoop]: Abstraction has 142563 states and 152424 transitions. [2021-12-17 03:31:27,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:27,152 INFO L276 IsEmpty]: Start isEmpty. Operand 142563 states and 152424 transitions. [2021-12-17 03:31:27,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2021-12-17 03:31:27,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:31:27,235 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 03:31:27,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 03:31:27,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-17 03:31:27,444 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:31:27,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:31:27,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1674460364, now seen corresponding path program 1 times [2021-12-17 03:31:27,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:31:27,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824015943] [2021-12-17 03:31:27,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:31:27,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:31:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:31:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 362 proven. 0 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2021-12-17 03:31:27,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:31:27,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824015943] [2021-12-17 03:31:27,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824015943] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:31:27,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:31:27,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:31:27,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372416123] [2021-12-17 03:31:27,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:31:27,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:31:27,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:31:27,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:31:27,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:27,967 INFO L87 Difference]: Start difference. First operand 142563 states and 152424 transitions. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 2 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:31:29,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:31:29,217 INFO L93 Difference]: Finished difference Result 296525 states and 317023 transitions. [2021-12-17 03:31:29,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:31:29,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 2 states have internal predecessors, (304), 0 states have call successors, (0), 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 537 [2021-12-17 03:31:29,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:31:29,413 INFO L225 Difference]: With dead ends: 296525 [2021-12-17 03:31:29,413 INFO L226 Difference]: Without dead ends: 154573 [2021-12-17 03:31:29,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:31:29,495 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 85 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:31:29,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 156 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:31:29,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154573 states.