./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label28.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/Problem17_label28.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 a9f11574ad30fc17c07131211bf5f95490e2bdab1a5c8ef6b6afc80480ba8e82 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 11:21:52,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:21:52,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:21:52,996 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:21:53,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:21:53,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:21:53,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:21:53,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:21:53,014 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:21:53,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:21:53,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:21:53,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:21:53,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:21:53,023 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:21:53,024 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:21:53,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:21:53,026 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:21:53,027 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:21:53,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:21:53,035 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:21:53,036 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:21:53,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:21:53,039 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:21:53,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:21:53,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:21:53,045 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:21:53,046 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:21:53,047 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:21:53,047 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:21:53,048 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:21:53,048 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:21:53,049 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:21:53,051 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:21:53,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:21:53,052 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:21:53,053 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:21:53,054 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:21:53,054 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:21:53,054 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:21:53,055 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:21:53,056 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:21:53,056 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 11:21:53,091 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:21:53,091 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:21:53,092 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:21:53,092 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:21:53,093 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:21:53,093 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:21:53,093 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:21:53,094 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:21:53,094 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:21:53,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:21:53,095 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:21:53,095 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 11:21:53,095 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:21:53,095 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:21:53,096 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:21:53,096 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:21:53,096 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:21:53,096 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:21:53,096 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:21:53,096 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:21:53,097 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:21:53,097 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:21:53,097 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:21:53,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:21:53,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:21:53,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:21:53,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:21:53,099 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:21:53,099 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 11:21:53,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 11:21:53,100 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:21:53,100 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:21:53,101 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:21:53,101 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:21:53,101 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9f11574ad30fc17c07131211bf5f95490e2bdab1a5c8ef6b6afc80480ba8e82 [2021-12-21 11:21:53,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:21:53,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:21:53,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:21:53,351 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:21:53,352 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:21:53,353 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label28.c [2021-12-21 11:21:53,412 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c4cb37ab/12d678c0e0f048c7844fb86fa208310c/FLAG22b9dc1b4 [2021-12-21 11:21:53,951 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:21:53,952 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label28.c [2021-12-21 11:21:53,986 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c4cb37ab/12d678c0e0f048c7844fb86fa208310c/FLAG22b9dc1b4 [2021-12-21 11:21:54,174 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c4cb37ab/12d678c0e0f048c7844fb86fa208310c [2021-12-21 11:21:54,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:21:54,179 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:21:54,181 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:21:54,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:21:54,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:21:54,185 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:21:54" (1/1) ... [2021-12-21 11:21:54,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@229790c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:54, skipping insertion in model container [2021-12-21 11:21:54,187 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:21:54" (1/1) ... [2021-12-21 11:21:54,192 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:21:54,276 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:21:54,544 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/Problem17_label28.c[9518,9531] [2021-12-21 11:21:55,003 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:21:55,011 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:21:55,043 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/Problem17_label28.c[9518,9531] [2021-12-21 11:21:55,254 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:21:55,298 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:21:55,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:55 WrapperNode [2021-12-21 11:21:55,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:21:55,300 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:21:55,300 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:21:55,300 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:21:55,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:55" (1/1) ... [2021-12-21 11:21:55,363 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:55" (1/1) ... [2021-12-21 11:21:55,614 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-21 11:21:55,614 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:21:55,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:21:55,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:21:55,616 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:21:55,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:55" (1/1) ... [2021-12-21 11:21:55,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:55" (1/1) ... [2021-12-21 11:21:55,682 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:55" (1/1) ... [2021-12-21 11:21:55,684 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:55" (1/1) ... [2021-12-21 11:21:55,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:55" (1/1) ... [2021-12-21 11:21:55,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:55" (1/1) ... [2021-12-21 11:21:55,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:55" (1/1) ... [2021-12-21 11:21:55,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:21:55,901 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:21:55,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:21:55,902 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:21:55,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:55" (1/1) ... [2021-12-21 11:21:55,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:21:55,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:21:55,932 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) [2021-12-21 11:21:55,958 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 [2021-12-21 11:21:55,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:21:55,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 11:21:55,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:21:55,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:21:56,028 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:21:56,030 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:21:59,028 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:21:59,039 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:21:59,039 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 11:21:59,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:21:59 BoogieIcfgContainer [2021-12-21 11:21:59,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:21:59,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:21:59,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:21:59,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:21:59,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:21:54" (1/3) ... [2021-12-21 11:21:59,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25006ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:21:59, skipping insertion in model container [2021-12-21 11:21:59,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:21:55" (2/3) ... [2021-12-21 11:21:59,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25006ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:21:59, skipping insertion in model container [2021-12-21 11:21:59,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:21:59" (3/3) ... [2021-12-21 11:21:59,048 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label28.c [2021-12-21 11:21:59,052 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:21:59,052 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 11:21:59,091 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:21:59,096 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 [2021-12-21 11:21:59,097 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 11:21:59,118 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:21:59,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-21 11:21:59,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:21:59,126 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] [2021-12-21 11:21:59,126 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:21:59,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:21:59,131 INFO L85 PathProgramCache]: Analyzing trace with hash -107486446, now seen corresponding path program 1 times [2021-12-21 11:21:59,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:21:59,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188706306] [2021-12-21 11:21:59,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:21:59,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:21:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:21:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:21:59,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:21:59,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188706306] [2021-12-21 11:21:59,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188706306] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:21:59,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:21:59,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:21:59,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119318572] [2021-12-21 11:21:59,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:21:59,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:21:59,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:21:59,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:21:59,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:21:59,406 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:01,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:22:01,906 INFO L93 Difference]: Finished difference Result 1642 states and 3024 transitions. [2021-12-21 11:22:01,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:22:01,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-21 11:22:01,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:22:01,924 INFO L225 Difference]: With dead ends: 1642 [2021-12-21 11:22:01,924 INFO L226 Difference]: Without dead ends: 975 [2021-12-21 11:22:01,930 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 [2021-12-21 11:22:01,932 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 426 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:22:01,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 550 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-21 11:22:01,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-12-21 11:22:02,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 972. [2021-12-21 11:22:02,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 1.5077239958805355) internal successors, (1464), 971 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:02,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1464 transitions. [2021-12-21 11:22:02,012 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1464 transitions. Word has length 64 [2021-12-21 11:22:02,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:22:02,013 INFO L470 AbstractCegarLoop]: Abstraction has 972 states and 1464 transitions. [2021-12-21 11:22:02,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:02,013 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1464 transitions. [2021-12-21 11:22:02,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-21 11:22:02,017 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:22:02,017 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:22:02,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 11:22:02,018 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:22:02,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:22:02,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1987590722, now seen corresponding path program 1 times [2021-12-21 11:22:02,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:22:02,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457618223] [2021-12-21 11:22:02,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:02,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:22:02,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:02,195 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:22:02,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:22:02,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457618223] [2021-12-21 11:22:02,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457618223] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:22:02,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:22:02,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:22:02,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997705579] [2021-12-21 11:22:02,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:22:02,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:22:02,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:22:02,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:22:02,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:22:02,199 INFO L87 Difference]: Start difference. First operand 972 states and 1464 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:04,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:22:04,340 INFO L93 Difference]: Finished difference Result 2814 states and 4242 transitions. [2021-12-21 11:22:04,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:22:04,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-12-21 11:22:04,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:22:04,348 INFO L225 Difference]: With dead ends: 2814 [2021-12-21 11:22:04,348 INFO L226 Difference]: Without dead ends: 1844 [2021-12-21 11:22:04,350 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 [2021-12-21 11:22:04,351 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 427 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-21 11:22:04,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 921 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-21 11:22:04,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-12-21 11:22:04,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1842. [2021-12-21 11:22:04,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1841 states have (on average 1.3601303639326452) internal successors, (2504), 1841 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:04,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 2504 transitions. [2021-12-21 11:22:04,386 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 2504 transitions. Word has length 134 [2021-12-21 11:22:04,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:22:04,389 INFO L470 AbstractCegarLoop]: Abstraction has 1842 states and 2504 transitions. [2021-12-21 11:22:04,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:04,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 2504 transitions. [2021-12-21 11:22:04,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-21 11:22:04,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:22:04,402 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, 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] [2021-12-21 11:22:04,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 11:22:04,403 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:22:04,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:22:04,404 INFO L85 PathProgramCache]: Analyzing trace with hash -158774367, now seen corresponding path program 1 times [2021-12-21 11:22:04,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:22:04,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058139998] [2021-12-21 11:22:04,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:04,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:22:04,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:22:04,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:22:04,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058139998] [2021-12-21 11:22:04,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058139998] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:22:04,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:22:04,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:22:04,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491018117] [2021-12-21 11:22:04,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:22:04,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:22:04,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:22:04,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:22:04,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:22:04,525 INFO L87 Difference]: Start difference. First operand 1842 states and 2504 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:06,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:22:06,572 INFO L93 Difference]: Finished difference Result 5395 states and 7326 transitions. [2021-12-21 11:22:06,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:22:06,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 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 156 [2021-12-21 11:22:06,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:22:06,584 INFO L225 Difference]: With dead ends: 5395 [2021-12-21 11:22:06,585 INFO L226 Difference]: Without dead ends: 2701 [2021-12-21 11:22:06,589 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 [2021-12-21 11:22:06,595 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 368 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:22:06,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-21 11:22:06,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2021-12-21 11:22:06,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2701. [2021-12-21 11:22:06,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2701 states, 2700 states have (on average 1.191851851851852) internal successors, (3218), 2700 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:06,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2701 states to 2701 states and 3218 transitions. [2021-12-21 11:22:06,643 INFO L78 Accepts]: Start accepts. Automaton has 2701 states and 3218 transitions. Word has length 156 [2021-12-21 11:22:06,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:22:06,645 INFO L470 AbstractCegarLoop]: Abstraction has 2701 states and 3218 transitions. [2021-12-21 11:22:06,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:06,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2701 states and 3218 transitions. [2021-12-21 11:22:06,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-12-21 11:22:06,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:22:06,650 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:22:06,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 11:22:06,650 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:22:06,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:22:06,651 INFO L85 PathProgramCache]: Analyzing trace with hash -175097035, now seen corresponding path program 1 times [2021-12-21 11:22:06,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:22:06,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976058981] [2021-12-21 11:22:06,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:06,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:22:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:06,813 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:22:06,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:22:06,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976058981] [2021-12-21 11:22:06,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976058981] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:22:06,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:22:06,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:22:06,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305136839] [2021-12-21 11:22:06,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:22:06,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:22:06,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:22:06,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:22:06,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:22:06,817 INFO L87 Difference]: Start difference. First operand 2701 states and 3218 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:08,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:22:08,385 INFO L93 Difference]: Finished difference Result 7108 states and 8598 transitions. [2021-12-21 11:22:08,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:22:08,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 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 216 [2021-12-21 11:22:08,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:22:08,400 INFO L225 Difference]: With dead ends: 7108 [2021-12-21 11:22:08,400 INFO L226 Difference]: Without dead ends: 4409 [2021-12-21 11:22:08,404 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 [2021-12-21 11:22:08,412 INFO L933 BasicCegarLoop]: 726 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:22:08,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 784 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 11:22:08,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4409 states. [2021-12-21 11:22:08,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4409 to 4409. [2021-12-21 11:22:08,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4408 states have (on average 1.1705989110707804) internal successors, (5160), 4408 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:08,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 5160 transitions. [2021-12-21 11:22:08,485 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 5160 transitions. Word has length 216 [2021-12-21 11:22:08,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:22:08,486 INFO L470 AbstractCegarLoop]: Abstraction has 4409 states and 5160 transitions. [2021-12-21 11:22:08,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:08,486 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 5160 transitions. [2021-12-21 11:22:08,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-12-21 11:22:08,489 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:22:08,489 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:22:08,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 11:22:08,489 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:22:08,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:22:08,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1176466000, now seen corresponding path program 1 times [2021-12-21 11:22:08,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:22:08,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740026388] [2021-12-21 11:22:08,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:08,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:22:08,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-21 11:22:08,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:22:08,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740026388] [2021-12-21 11:22:08,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740026388] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:22:08,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:22:08,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:22:08,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354968217] [2021-12-21 11:22:08,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:22:08,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:22:08,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:22:08,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:22:08,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:22:08,644 INFO L87 Difference]: Start difference. First operand 4409 states and 5160 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:10,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:22:10,297 INFO L93 Difference]: Finished difference Result 10936 states and 12970 transitions. [2021-12-21 11:22:10,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:22:10,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 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 218 [2021-12-21 11:22:10,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:22:10,318 INFO L225 Difference]: With dead ends: 10936 [2021-12-21 11:22:10,319 INFO L226 Difference]: Without dead ends: 6528 [2021-12-21 11:22:10,324 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 [2021-12-21 11:22:10,324 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 387 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:22:10,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 444 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 11:22:10,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6528 states. [2021-12-21 11:22:10,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6528 to 4382. [2021-12-21 11:22:10,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4382 states, 4381 states have (on average 1.1684546907098836) internal successors, (5119), 4381 states have internal predecessors, (5119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:10,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 5119 transitions. [2021-12-21 11:22:10,415 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 5119 transitions. Word has length 218 [2021-12-21 11:22:10,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:22:10,416 INFO L470 AbstractCegarLoop]: Abstraction has 4382 states and 5119 transitions. [2021-12-21 11:22:10,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:10,419 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 5119 transitions. [2021-12-21 11:22:10,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-12-21 11:22:10,423 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:22:10,423 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:22:10,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 11:22:10,424 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:22:10,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:22:10,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1033656950, now seen corresponding path program 1 times [2021-12-21 11:22:10,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:22:10,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473179080] [2021-12-21 11:22:10,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:10,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:22:10,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:10,622 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-21 11:22:10,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:22:10,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473179080] [2021-12-21 11:22:10,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473179080] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:22:10,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:22:10,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:22:10,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136168445] [2021-12-21 11:22:10,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:22:10,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:22:10,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:22:10,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:22:10,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:22:10,625 INFO L87 Difference]: Start difference. First operand 4382 states and 5119 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:12,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:22:12,361 INFO L93 Difference]: Finished difference Result 10045 states and 11706 transitions. [2021-12-21 11:22:12,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:22:12,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 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 284 [2021-12-21 11:22:12,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:22:12,378 INFO L225 Difference]: With dead ends: 10045 [2021-12-21 11:22:12,378 INFO L226 Difference]: Without dead ends: 5665 [2021-12-21 11:22:12,383 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 [2021-12-21 11:22:12,384 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 372 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:22:12,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 894 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-21 11:22:12,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5665 states. [2021-12-21 11:22:12,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5665 to 5234. [2021-12-21 11:22:12,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5234 states, 5233 states have (on average 1.1587999235620103) internal successors, (6064), 5233 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:12,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 6064 transitions. [2021-12-21 11:22:12,463 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 6064 transitions. Word has length 284 [2021-12-21 11:22:12,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:22:12,463 INFO L470 AbstractCegarLoop]: Abstraction has 5234 states and 6064 transitions. [2021-12-21 11:22:12,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:12,464 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 6064 transitions. [2021-12-21 11:22:12,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2021-12-21 11:22:12,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:22:12,468 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:22:12,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 11:22:12,468 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:22:12,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:22:12,470 INFO L85 PathProgramCache]: Analyzing trace with hash -639503021, now seen corresponding path program 1 times [2021-12-21 11:22:12,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:22:12,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225895205] [2021-12-21 11:22:12,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:12,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:22:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:12,636 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 256 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-12-21 11:22:12,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:22:12,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225895205] [2021-12-21 11:22:12,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225895205] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:22:12,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:22:12,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:22:12,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020322082] [2021-12-21 11:22:12,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:22:12,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:22:12,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:22:12,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:22:12,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:22:12,639 INFO L87 Difference]: Start difference. First operand 5234 states and 6064 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:14,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:22:14,232 INFO L93 Difference]: Finished difference Result 12593 states and 14783 transitions. [2021-12-21 11:22:14,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:22:14,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 296 [2021-12-21 11:22:14,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:22:14,252 INFO L225 Difference]: With dead ends: 12593 [2021-12-21 11:22:14,253 INFO L226 Difference]: Without dead ends: 6936 [2021-12-21 11:22:14,259 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 [2021-12-21 11:22:14,260 INFO L933 BasicCegarLoop]: 778 mSDtfsCounter, 383 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:22:14,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 847 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 11:22:14,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6936 states. [2021-12-21 11:22:14,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6936 to 6936. [2021-12-21 11:22:14,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6936 states, 6935 states have (on average 1.1322278298485942) internal successors, (7852), 6935 states have internal predecessors, (7852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:14,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6936 states to 6936 states and 7852 transitions. [2021-12-21 11:22:14,360 INFO L78 Accepts]: Start accepts. Automaton has 6936 states and 7852 transitions. Word has length 296 [2021-12-21 11:22:14,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:22:14,361 INFO L470 AbstractCegarLoop]: Abstraction has 6936 states and 7852 transitions. [2021-12-21 11:22:14,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:14,362 INFO L276 IsEmpty]: Start isEmpty. Operand 6936 states and 7852 transitions. [2021-12-21 11:22:14,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2021-12-21 11:22:14,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:22:14,367 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:22:14,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 11:22:14,367 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:22:14,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:22:14,368 INFO L85 PathProgramCache]: Analyzing trace with hash -435453770, now seen corresponding path program 1 times [2021-12-21 11:22:14,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:22:14,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376060202] [2021-12-21 11:22:14,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:14,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:22:14,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-12-21 11:22:14,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:22:14,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376060202] [2021-12-21 11:22:14,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376060202] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:22:14,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:22:14,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:22:14,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175224873] [2021-12-21 11:22:14,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:22:14,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:22:14,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:22:14,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:22:14,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:22:14,513 INFO L87 Difference]: Start difference. First operand 6936 states and 7852 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:16,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:22:16,176 INFO L93 Difference]: Finished difference Result 17279 states and 19683 transitions. [2021-12-21 11:22:16,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:22:16,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 336 [2021-12-21 11:22:16,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:22:16,192 INFO L225 Difference]: With dead ends: 17279 [2021-12-21 11:22:16,192 INFO L226 Difference]: Without dead ends: 9468 [2021-12-21 11:22:16,200 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 [2021-12-21 11:22:16,200 INFO L933 BasicCegarLoop]: 610 mSDtfsCounter, 481 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:22:16,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 640 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 11:22:16,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9468 states. [2021-12-21 11:22:16,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9468 to 9038. [2021-12-21 11:22:16,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9038 states, 9037 states have (on average 1.1249308398804914) internal successors, (10166), 9037 states have internal predecessors, (10166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:16,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9038 states to 9038 states and 10166 transitions. [2021-12-21 11:22:16,307 INFO L78 Accepts]: Start accepts. Automaton has 9038 states and 10166 transitions. Word has length 336 [2021-12-21 11:22:16,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:22:16,308 INFO L470 AbstractCegarLoop]: Abstraction has 9038 states and 10166 transitions. [2021-12-21 11:22:16,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:16,308 INFO L276 IsEmpty]: Start isEmpty. Operand 9038 states and 10166 transitions. [2021-12-21 11:22:16,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2021-12-21 11:22:16,315 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:22:16,316 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:22:16,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 11:22:16,317 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:22:16,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:22:16,318 INFO L85 PathProgramCache]: Analyzing trace with hash 292616392, now seen corresponding path program 1 times [2021-12-21 11:22:16,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:22:16,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355073392] [2021-12-21 11:22:16,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:16,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:22:16,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:16,507 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:22:16,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:22:16,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355073392] [2021-12-21 11:22:16,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355073392] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:22:16,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:22:16,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:22:16,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737526512] [2021-12-21 11:22:16,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:22:16,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:22:16,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:22:16,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:22:16,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:22:16,511 INFO L87 Difference]: Start difference. First operand 9038 states and 10166 transitions. Second operand has 4 states, 4 states have (on average 100.75) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:19,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:22:19,074 INFO L93 Difference]: Finished difference Result 26190 states and 29348 transitions. [2021-12-21 11:22:19,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:22:19,075 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 100.75) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 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 403 [2021-12-21 11:22:19,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:22:19,102 INFO L225 Difference]: With dead ends: 26190 [2021-12-21 11:22:19,102 INFO L226 Difference]: Without dead ends: 16729 [2021-12-21 11:22:19,113 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 [2021-12-21 11:22:19,114 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 508 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 2686 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 2857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 2686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:22:19,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 373 Invalid, 2857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 2686 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-21 11:22:19,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16729 states. [2021-12-21 11:22:19,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16729 to 16708. [2021-12-21 11:22:19,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16708 states, 16707 states have (on average 1.108277967319088) internal successors, (18516), 16707 states have internal predecessors, (18516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:19,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16708 states to 16708 states and 18516 transitions. [2021-12-21 11:22:19,298 INFO L78 Accepts]: Start accepts. Automaton has 16708 states and 18516 transitions. Word has length 403 [2021-12-21 11:22:19,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:22:19,299 INFO L470 AbstractCegarLoop]: Abstraction has 16708 states and 18516 transitions. [2021-12-21 11:22:19,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.75) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:19,299 INFO L276 IsEmpty]: Start isEmpty. Operand 16708 states and 18516 transitions. [2021-12-21 11:22:19,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-12-21 11:22:19,308 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:22:19,309 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:22:19,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 11:22:19,309 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:22:19,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:22:19,310 INFO L85 PathProgramCache]: Analyzing trace with hash 704539906, now seen corresponding path program 1 times [2021-12-21 11:22:19,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:22:19,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053816505] [2021-12-21 11:22:19,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:19,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:22:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:19,459 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-12-21 11:22:19,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:22:19,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053816505] [2021-12-21 11:22:19,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053816505] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:22:19,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:22:19,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:22:19,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410843853] [2021-12-21 11:22:19,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:22:19,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:22:19,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:22:19,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:22:19,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:22:19,462 INFO L87 Difference]: Start difference. First operand 16708 states and 18516 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:21,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:22:21,038 INFO L93 Difference]: Finished difference Result 36816 states and 41081 transitions. [2021-12-21 11:22:21,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:22:21,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 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 407 [2021-12-21 11:22:21,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:22:21,071 INFO L225 Difference]: With dead ends: 36816 [2021-12-21 11:22:21,071 INFO L226 Difference]: Without dead ends: 20110 [2021-12-21 11:22:21,090 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 [2021-12-21 11:22:21,091 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 415 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:22:21,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 299 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 11:22:21,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20110 states. [2021-12-21 11:22:21,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20110 to 18831. [2021-12-21 11:22:21,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18831 states, 18830 states have (on average 1.1070100902814657) internal successors, (20845), 18830 states have internal predecessors, (20845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:21,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18831 states to 18831 states and 20845 transitions. [2021-12-21 11:22:21,304 INFO L78 Accepts]: Start accepts. Automaton has 18831 states and 20845 transitions. Word has length 407 [2021-12-21 11:22:21,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:22:21,307 INFO L470 AbstractCegarLoop]: Abstraction has 18831 states and 20845 transitions. [2021-12-21 11:22:21,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:21,307 INFO L276 IsEmpty]: Start isEmpty. Operand 18831 states and 20845 transitions. [2021-12-21 11:22:21,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2021-12-21 11:22:21,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:22:21,339 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:22:21,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 11:22:21,340 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:22:21,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:22:21,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1668251932, now seen corresponding path program 1 times [2021-12-21 11:22:21,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:22:21,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364789725] [2021-12-21 11:22:21,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:21,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:22:21,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 342 proven. 82 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-21 11:22:21,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:22:21,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364789725] [2021-12-21 11:22:21,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364789725] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:22:21,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308717904] [2021-12-21 11:22:21,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:21,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:22:21,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:22:21,604 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) [2021-12-21 11:22:21,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 11:22:21,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:21,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 11:22:21,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:22:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 404 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-21 11:22:22,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:22:22,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308717904] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:22:22,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:22:22,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2021-12-21 11:22:22,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727424774] [2021-12-21 11:22:22,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:22:22,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:22:22,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:22:22,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:22:22,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:22:22,955 INFO L87 Difference]: Start difference. First operand 18831 states and 20845 transitions. Second operand has 4 states, 4 states have (on average 135.5) internal successors, (542), 4 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:25,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:22:25,814 INFO L93 Difference]: Finished difference Result 55572 states and 61843 transitions. [2021-12-21 11:22:25,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:22:25,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 135.5) internal successors, (542), 4 states have internal predecessors, (542), 0 states have call successors, (0), 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 623 [2021-12-21 11:22:25,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:22:25,871 INFO L225 Difference]: With dead ends: 55572 [2021-12-21 11:22:25,871 INFO L226 Difference]: Without dead ends: 35039 [2021-12-21 11:22:25,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 621 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:22:25,885 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 575 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2528 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 2998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 2528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:22:25,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 219 Invalid, 2998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 2528 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-21 11:22:25,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35039 states. [2021-12-21 11:22:26,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35039 to 33305. [2021-12-21 11:22:26,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33305 states, 33304 states have (on average 1.110377131876051) internal successors, (36980), 33304 states have internal predecessors, (36980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:26,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33305 states to 33305 states and 36980 transitions. [2021-12-21 11:22:26,265 INFO L78 Accepts]: Start accepts. Automaton has 33305 states and 36980 transitions. Word has length 623 [2021-12-21 11:22:26,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:22:26,265 INFO L470 AbstractCegarLoop]: Abstraction has 33305 states and 36980 transitions. [2021-12-21 11:22:26,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 135.5) internal successors, (542), 4 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:26,266 INFO L276 IsEmpty]: Start isEmpty. Operand 33305 states and 36980 transitions. [2021-12-21 11:22:26,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 668 [2021-12-21 11:22:26,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:22:26,297 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:22:26,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 11:22:26,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-21 11:22:26,523 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:22:26,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:22:26,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1349727723, now seen corresponding path program 1 times [2021-12-21 11:22:26,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:22:26,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791047327] [2021-12-21 11:22:26,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:26,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:22:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 372 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-21 11:22:26,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:22:26,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791047327] [2021-12-21 11:22:26,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791047327] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:22:26,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:22:26,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:22:26,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648300823] [2021-12-21 11:22:26,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:22:26,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:22:26,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:22:26,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:22:26,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:22:26,909 INFO L87 Difference]: Start difference. First operand 33305 states and 36980 transitions. Second operand has 3 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:28,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:22:28,436 INFO L93 Difference]: Finished difference Result 79380 states and 88473 transitions. [2021-12-21 11:22:28,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:22:28,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 667 [2021-12-21 11:22:28,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:22:28,500 INFO L225 Difference]: With dead ends: 79380 [2021-12-21 11:22:28,500 INFO L226 Difference]: Without dead ends: 45220 [2021-12-21 11:22:28,530 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 [2021-12-21 11:22:28,532 INFO L933 BasicCegarLoop]: 604 mSDtfsCounter, 102 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:22:28,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 642 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 11:22:28,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45220 states. [2021-12-21 11:22:29,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45220 to 44787. [2021-12-21 11:22:29,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44787 states, 44786 states have (on average 1.1031795650426472) internal successors, (49407), 44786 states have internal predecessors, (49407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:29,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44787 states to 44787 states and 49407 transitions. [2021-12-21 11:22:29,174 INFO L78 Accepts]: Start accepts. Automaton has 44787 states and 49407 transitions. Word has length 667 [2021-12-21 11:22:29,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:22:29,175 INFO L470 AbstractCegarLoop]: Abstraction has 44787 states and 49407 transitions. [2021-12-21 11:22:29,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:29,175 INFO L276 IsEmpty]: Start isEmpty. Operand 44787 states and 49407 transitions. [2021-12-21 11:22:29,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2021-12-21 11:22:29,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:22:29,210 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:22:29,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 11:22:29,211 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:22:29,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:22:29,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1592530397, now seen corresponding path program 1 times [2021-12-21 11:22:29,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:22:29,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147336751] [2021-12-21 11:22:29,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:29,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:22:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:29,414 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 586 proven. 0 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-12-21 11:22:29,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:22:29,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147336751] [2021-12-21 11:22:29,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147336751] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:22:29,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:22:29,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:22:29,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344479608] [2021-12-21 11:22:29,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:22:29,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:22:29,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:22:29,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:22:29,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:22:29,417 INFO L87 Difference]: Start difference. First operand 44787 states and 49407 transitions. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:30,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:22:30,963 INFO L93 Difference]: Finished difference Result 98504 states and 109011 transitions. [2021-12-21 11:22:30,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:22:30,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 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 708 [2021-12-21 11:22:30,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:22:31,029 INFO L225 Difference]: With dead ends: 98504 [2021-12-21 11:22:31,029 INFO L226 Difference]: Without dead ends: 53719 [2021-12-21 11:22:31,063 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 [2021-12-21 11:22:31,063 INFO L933 BasicCegarLoop]: 632 mSDtfsCounter, 489 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:22:31,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 673 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 11:22:31,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53719 states. [2021-12-21 11:22:31,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53719 to 53713. [2021-12-21 11:22:31,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53713 states, 53712 states have (on average 1.0985440869824248) internal successors, (59005), 53712 states have internal predecessors, (59005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:31,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53713 states to 53713 states and 59005 transitions. [2021-12-21 11:22:31,836 INFO L78 Accepts]: Start accepts. Automaton has 53713 states and 59005 transitions. Word has length 708 [2021-12-21 11:22:31,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:22:31,837 INFO L470 AbstractCegarLoop]: Abstraction has 53713 states and 59005 transitions. [2021-12-21 11:22:31,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:31,837 INFO L276 IsEmpty]: Start isEmpty. Operand 53713 states and 59005 transitions. [2021-12-21 11:22:31,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 718 [2021-12-21 11:22:31,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:22:31,872 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:22:31,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 11:22:31,872 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:22:31,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:22:31,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1076104734, now seen corresponding path program 1 times [2021-12-21 11:22:31,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:22:31,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168162031] [2021-12-21 11:22:31,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:31,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:22:31,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 500 proven. 0 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2021-12-21 11:22:32,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:22:32,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168162031] [2021-12-21 11:22:32,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168162031] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:22:32,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:22:32,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:22:32,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452260188] [2021-12-21 11:22:32,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:22:32,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:22:32,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:22:32,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:22:32,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:22:32,088 INFO L87 Difference]: Start difference. First operand 53713 states and 59005 transitions. Second operand has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:34,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:22:34,162 INFO L93 Difference]: Finished difference Result 117221 states and 128793 transitions. [2021-12-21 11:22:34,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:22:34,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 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 717 [2021-12-21 11:22:34,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:22:34,224 INFO L225 Difference]: With dead ends: 117221 [2021-12-21 11:22:34,224 INFO L226 Difference]: Without dead ends: 63510 [2021-12-21 11:22:34,250 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 [2021-12-21 11:22:34,251 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 470 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:22:34,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 256 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1214 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-21 11:22:34,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63510 states. [2021-12-21 11:22:34,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63510 to 50722. [2021-12-21 11:22:34,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50722 states, 50721 states have (on average 1.1003134796238245) internal successors, (55809), 50721 states have internal predecessors, (55809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:34,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50722 states to 50722 states and 55809 transitions. [2021-12-21 11:22:34,858 INFO L78 Accepts]: Start accepts. Automaton has 50722 states and 55809 transitions. Word has length 717 [2021-12-21 11:22:34,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:22:34,858 INFO L470 AbstractCegarLoop]: Abstraction has 50722 states and 55809 transitions. [2021-12-21 11:22:34,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:34,858 INFO L276 IsEmpty]: Start isEmpty. Operand 50722 states and 55809 transitions. [2021-12-21 11:22:34,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 749 [2021-12-21 11:22:34,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:22:34,888 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:22:34,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 11:22:34,889 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:22:34,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:22:34,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1144017052, now seen corresponding path program 1 times [2021-12-21 11:22:34,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:22:34,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244498497] [2021-12-21 11:22:34,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:34,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:22:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:35,367 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 391 proven. 82 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-21 11:22:35,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:22:35,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244498497] [2021-12-21 11:22:35,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244498497] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:22:35,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010477364] [2021-12-21 11:22:35,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:35,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:22:35,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:22:35,372 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) [2021-12-21 11:22:35,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 11:22:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:35,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 11:22:35,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:22:37,394 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 371 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:22:37,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 11:22:38,863 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 535 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:22:38,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010477364] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 11:22:38,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 11:22:38,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 4] total 7 [2021-12-21 11:22:38,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423960389] [2021-12-21 11:22:38,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:22:38,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 11:22:38,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:22:38,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 11:22:38,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-21 11:22:38,866 INFO L87 Difference]: Start difference. First operand 50722 states and 55809 transitions. Second operand has 5 states, 5 states have (on average 149.6) internal successors, (748), 4 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:41,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:22:41,383 INFO L93 Difference]: Finished difference Result 112518 states and 123810 transitions. [2021-12-21 11:22:41,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 11:22:41,384 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 149.6) internal successors, (748), 4 states have internal predecessors, (748), 0 states have call successors, (0), 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 748 [2021-12-21 11:22:41,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:22:41,442 INFO L225 Difference]: With dead ends: 112518 [2021-12-21 11:22:41,442 INFO L226 Difference]: Without dead ends: 60948 [2021-12-21 11:22:41,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1497 GetRequests, 1489 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-21 11:22:41,464 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 587 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 2506 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 3085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 2506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:22:41,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [587 Valid, 150 Invalid, 3085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 2506 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-21 11:22:41,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60948 states. [2021-12-21 11:22:41,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60948 to 50308. [2021-12-21 11:22:42,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50308 states, 50307 states have (on average 1.0974218299640208) internal successors, (55208), 50307 states have internal predecessors, (55208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:42,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50308 states to 50308 states and 55208 transitions. [2021-12-21 11:22:42,069 INFO L78 Accepts]: Start accepts. Automaton has 50308 states and 55208 transitions. Word has length 748 [2021-12-21 11:22:42,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:22:42,069 INFO L470 AbstractCegarLoop]: Abstraction has 50308 states and 55208 transitions. [2021-12-21 11:22:42,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 149.6) internal successors, (748), 4 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:42,070 INFO L276 IsEmpty]: Start isEmpty. Operand 50308 states and 55208 transitions. [2021-12-21 11:22:42,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 765 [2021-12-21 11:22:42,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:22:42,102 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:22:42,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 11:22:42,324 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,SelfDestructingSolverStorable14 [2021-12-21 11:22:42,325 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:22:42,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:22:42,325 INFO L85 PathProgramCache]: Analyzing trace with hash -690683867, now seen corresponding path program 1 times [2021-12-21 11:22:42,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:22:42,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087362142] [2021-12-21 11:22:42,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:42,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:22:42,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:42,761 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 623 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-21 11:22:42,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:22:42,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087362142] [2021-12-21 11:22:42,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087362142] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:22:42,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:22:42,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:22:42,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818536138] [2021-12-21 11:22:42,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:22:42,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:22:42,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:22:42,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:22:42,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:22:42,764 INFO L87 Difference]: Start difference. First operand 50308 states and 55208 transitions. Second operand has 3 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:44,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:22:44,623 INFO L93 Difference]: Finished difference Result 113813 states and 125096 transitions. [2021-12-21 11:22:44,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:22:44,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 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 764 [2021-12-21 11:22:44,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:22:44,691 INFO L225 Difference]: With dead ends: 113813 [2021-12-21 11:22:44,691 INFO L226 Difference]: Without dead ends: 63082 [2021-12-21 11:22:44,724 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 [2021-12-21 11:22:44,725 INFO L933 BasicCegarLoop]: 703 mSDtfsCounter, 322 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 1363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:22:44,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 751 Invalid, 1363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1234 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 11:22:44,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63082 states. [2021-12-21 11:22:45,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63082 to 60945. [2021-12-21 11:22:45,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60945 states, 60944 states have (on average 1.0912805198214754) internal successors, (66507), 60944 states have internal predecessors, (66507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:45,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60945 states to 60945 states and 66507 transitions. [2021-12-21 11:22:45,465 INFO L78 Accepts]: Start accepts. Automaton has 60945 states and 66507 transitions. Word has length 764 [2021-12-21 11:22:45,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:22:45,465 INFO L470 AbstractCegarLoop]: Abstraction has 60945 states and 66507 transitions. [2021-12-21 11:22:45,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:22:45,466 INFO L276 IsEmpty]: Start isEmpty. Operand 60945 states and 66507 transitions. [2021-12-21 11:22:45,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 843 [2021-12-21 11:22:45,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:22:45,496 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:22:45,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 11:22:45,496 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:22:45,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:22:45,496 INFO L85 PathProgramCache]: Analyzing trace with hash 351331225, now seen corresponding path program 1 times [2021-12-21 11:22:45,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:22:45,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116397112] [2021-12-21 11:22:45,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:45,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:22:45,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:46,146 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 520 proven. 63 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-21 11:22:46,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:22:46,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116397112] [2021-12-21 11:22:46,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116397112] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:22:46,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219143788] [2021-12-21 11:22:46,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:22:46,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:22:46,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:22:46,152 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) [2021-12-21 11:22:46,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 11:22:46,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:22:46,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:22:46,555 INFO L286 TraceCheckSpWp]: Computing forward predicates...