./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label00.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label00.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 5af223e668aa8b86ae636f9439d9ac4f153fc620faa9da4461ac4ba5e2c60ee8 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 02:14:21,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 02:14:21,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 02:14:21,149 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 02:14:21,149 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 02:14:21,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 02:14:21,153 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 02:14:21,156 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 02:14:21,158 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 02:14:21,161 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 02:14:21,162 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 02:14:21,164 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 02:14:21,165 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 02:14:21,167 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 02:14:21,168 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 02:14:21,170 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 02:14:21,171 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 02:14:21,172 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 02:14:21,174 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 02:14:21,179 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 02:14:21,180 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 02:14:21,181 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 02:14:21,183 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 02:14:21,184 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 02:14:21,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 02:14:21,190 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 02:14:21,190 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 02:14:21,191 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 02:14:21,192 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 02:14:21,192 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 02:14:21,193 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 02:14:21,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 02:14:21,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 02:14:21,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 02:14:21,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 02:14:21,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 02:14:21,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 02:14:21,197 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 02:14:21,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 02:14:21,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 02:14:21,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 02:14:21,201 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 02:14:21,230 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 02:14:21,230 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 02:14:21,231 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 02:14:21,231 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 02:14:21,232 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 02:14:21,232 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 02:14:21,233 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 02:14:21,233 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 02:14:21,233 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 02:14:21,234 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 02:14:21,234 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 02:14:21,234 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 02:14:21,235 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 02:14:21,235 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 02:14:21,235 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 02:14:21,235 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 02:14:21,235 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 02:14:21,235 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 02:14:21,235 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 02:14:21,236 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 02:14:21,236 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 02:14:21,236 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 02:14:21,236 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 02:14:21,236 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 02:14:21,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:14:21,236 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 02:14:21,237 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 02:14:21,237 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 02:14:21,237 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 02:14:21,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 02:14:21,237 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 02:14:21,237 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 02:14:21,238 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 02:14:21,238 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5af223e668aa8b86ae636f9439d9ac4f153fc620faa9da4461ac4ba5e2c60ee8 [2021-12-28 02:14:21,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 02:14:21,523 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 02:14:21,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 02:14:21,526 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 02:14:21,526 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 02:14:21,527 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label00.c [2021-12-28 02:14:21,570 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd237e136/b643a2ae59734052b629d6e421005697/FLAG9caf2a19d [2021-12-28 02:14:22,127 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 02:14:22,128 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label00.c [2021-12-28 02:14:22,155 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd237e136/b643a2ae59734052b629d6e421005697/FLAG9caf2a19d [2021-12-28 02:14:22,602 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd237e136/b643a2ae59734052b629d6e421005697 [2021-12-28 02:14:22,604 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 02:14:22,605 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 02:14:22,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 02:14:22,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 02:14:22,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 02:14:22,609 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:14:22" (1/1) ... [2021-12-28 02:14:22,609 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1215a4b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:14:22, skipping insertion in model container [2021-12-28 02:14:22,609 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:14:22" (1/1) ... [2021-12-28 02:14:22,614 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 02:14:22,706 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 02:14:22,944 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/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label00.c[6450,6463] [2021-12-28 02:14:22,971 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/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label00.c[8325,8338] [2021-12-28 02:14:23,490 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:14:23,495 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 02:14:23,527 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/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label00.c[6450,6463] [2021-12-28 02:14:23,530 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/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label00.c[8325,8338] [2021-12-28 02:14:23,883 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:14:23,901 INFO L208 MainTranslator]: Completed translation [2021-12-28 02:14:23,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:14:23 WrapperNode [2021-12-28 02:14:23,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 02:14:23,902 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 02:14:23,902 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 02:14:23,902 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 02:14:23,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:14:23" (1/1) ... [2021-12-28 02:14:23,947 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:14:23" (1/1) ... [2021-12-28 02:14:24,291 INFO L137 Inliner]: procedures = 35, calls = 20, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 4976 [2021-12-28 02:14:24,298 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 02:14:24,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 02:14:24,299 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 02:14:24,299 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 02:14:24,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:14:23" (1/1) ... [2021-12-28 02:14:24,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:14:23" (1/1) ... [2021-12-28 02:14:24,421 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:14:23" (1/1) ... [2021-12-28 02:14:24,421 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:14:23" (1/1) ... [2021-12-28 02:14:24,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:14:23" (1/1) ... [2021-12-28 02:14:24,547 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:14:23" (1/1) ... [2021-12-28 02:14:24,610 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:14:23" (1/1) ... [2021-12-28 02:14:24,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 02:14:24,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 02:14:24,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 02:14:24,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 02:14:24,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:14:23" (1/1) ... [2021-12-28 02:14:24,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:14:24,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:14:24,747 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) [2021-12-28 02:14:24,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 02:14:24,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 02:14:24,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 02:14:24,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 02:14:24,771 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 [2021-12-28 02:14:24,905 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 02:14:24,906 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 02:14:27,596 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 02:14:27,619 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 02:14:27,620 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-28 02:14:27,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:14:27 BoogieIcfgContainer [2021-12-28 02:14:27,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 02:14:27,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 02:14:27,623 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 02:14:27,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 02:14:27,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 02:14:22" (1/3) ... [2021-12-28 02:14:27,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@281dfd84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:14:27, skipping insertion in model container [2021-12-28 02:14:27,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:14:23" (2/3) ... [2021-12-28 02:14:27,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@281dfd84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:14:27, skipping insertion in model container [2021-12-28 02:14:27,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:14:27" (3/3) ... [2021-12-28 02:14:27,640 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label00.c [2021-12-28 02:14:27,643 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 02:14:27,643 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-28 02:14:27,674 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 02:14:27,678 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 [2021-12-28 02:14:27,678 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-28 02:14:27,699 INFO L276 IsEmpty]: Start isEmpty. Operand has 880 states, 877 states have (on average 1.903078677309008) internal successors, (1669), 879 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:27,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-28 02:14:27,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:14:27,703 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:14:27,704 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:14:27,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:14:27,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1728623957, now seen corresponding path program 1 times [2021-12-28 02:14:27,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:14:27,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133917634] [2021-12-28 02:14:27,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:14:27,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:14:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:14:27,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:14:27,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:14:27,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133917634] [2021-12-28 02:14:27,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133917634] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:14:27,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:14:27,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 02:14:27,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658182236] [2021-12-28 02:14:27,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:14:27,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:14:27,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:14:27,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:14:27,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:14:27,917 INFO L87 Difference]: Start difference. First operand has 880 states, 877 states have (on average 1.903078677309008) internal successors, (1669), 879 states have internal predecessors, (1669), 0 states have call successors, (0), 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 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:30,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:14:30,883 INFO L93 Difference]: Finished difference Result 2491 states and 4798 transitions. [2021-12-28 02:14:30,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:14:30,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-12-28 02:14:30,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:14:30,900 INFO L225 Difference]: With dead ends: 2491 [2021-12-28 02:14:30,900 INFO L226 Difference]: Without dead ends: 1565 [2021-12-28 02:14:30,905 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 [2021-12-28 02:14:30,907 INFO L933 BasicCegarLoop]: 569 mSDtfsCounter, 916 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-28 02:14:30,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [916 Valid, 580 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-28 02:14:30,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2021-12-28 02:14:30,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1565. [2021-12-28 02:14:30,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1565 states, 1563 states have (on average 1.6397952655150352) internal successors, (2563), 1564 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:31,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 2563 transitions. [2021-12-28 02:14:31,010 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 2563 transitions. Word has length 16 [2021-12-28 02:14:31,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:14:31,011 INFO L470 AbstractCegarLoop]: Abstraction has 1565 states and 2563 transitions. [2021-12-28 02:14:31,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:31,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 2563 transitions. [2021-12-28 02:14:31,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-28 02:14:31,013 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:14:31,013 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] [2021-12-28 02:14:31,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 02:14:31,013 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:14:31,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:14:31,014 INFO L85 PathProgramCache]: Analyzing trace with hash 783737522, now seen corresponding path program 1 times [2021-12-28 02:14:31,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:14:31,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922857854] [2021-12-28 02:14:31,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:14:31,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:14:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:14:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:14:31,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:14:31,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922857854] [2021-12-28 02:14:31,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922857854] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:14:31,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:14:31,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:14:31,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496158577] [2021-12-28 02:14:31,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:14:31,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:14:31,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:14:31,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:14:31,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:14:31,096 INFO L87 Difference]: Start difference. First operand 1565 states and 2563 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:31,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:14:31,161 INFO L93 Difference]: Finished difference Result 1607 states and 2626 transitions. [2021-12-28 02:14:31,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:14:31,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-12-28 02:14:31,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:14:31,166 INFO L225 Difference]: With dead ends: 1607 [2021-12-28 02:14:31,166 INFO L226 Difference]: Without dead ends: 1565 [2021-12-28 02:14:31,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:14:31,168 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 3 mSDsluCounter, 4583 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6117 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:14:31,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6117 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:14:31,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2021-12-28 02:14:31,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1565. [2021-12-28 02:14:31,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1565 states, 1563 states have (on average 1.6295585412667946) internal successors, (2547), 1564 states have internal predecessors, (2547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:31,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 2547 transitions. [2021-12-28 02:14:31,190 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 2547 transitions. Word has length 26 [2021-12-28 02:14:31,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:14:31,190 INFO L470 AbstractCegarLoop]: Abstraction has 1565 states and 2547 transitions. [2021-12-28 02:14:31,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:31,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 2547 transitions. [2021-12-28 02:14:31,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-28 02:14:31,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:14:31,192 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] [2021-12-28 02:14:31,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 02:14:31,192 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:14:31,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:14:31,193 INFO L85 PathProgramCache]: Analyzing trace with hash -698732182, now seen corresponding path program 1 times [2021-12-28 02:14:31,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:14:31,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577073487] [2021-12-28 02:14:31,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:14:31,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:14:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:14:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:14:31,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:14:31,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577073487] [2021-12-28 02:14:31,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577073487] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:14:31,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:14:31,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:14:31,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892281688] [2021-12-28 02:14:31,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:14:31,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:14:31,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:14:31,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:14:31,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:14:31,232 INFO L87 Difference]: Start difference. First operand 1565 states and 2547 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:31,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:14:31,291 INFO L93 Difference]: Finished difference Result 1635 states and 2655 transitions. [2021-12-28 02:14:31,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:14:31,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-28 02:14:31,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:14:31,295 INFO L225 Difference]: With dead ends: 1635 [2021-12-28 02:14:31,296 INFO L226 Difference]: Without dead ends: 1597 [2021-12-28 02:14:31,296 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 [2021-12-28 02:14:31,297 INFO L933 BasicCegarLoop]: 1549 mSDtfsCounter, 1484 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1484 SdHoareTripleChecker+Valid, 1610 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:14:31,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1484 Valid, 1610 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:14:31,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2021-12-28 02:14:31,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1595. [2021-12-28 02:14:31,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1593 states have (on average 1.628374136848713) internal successors, (2594), 1594 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:31,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 2594 transitions. [2021-12-28 02:14:31,318 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 2594 transitions. Word has length 41 [2021-12-28 02:14:31,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:14:31,318 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 2594 transitions. [2021-12-28 02:14:31,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:31,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 2594 transitions. [2021-12-28 02:14:31,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-28 02:14:31,319 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:14:31,319 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] [2021-12-28 02:14:31,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 02:14:31,320 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:14:31,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:14:31,320 INFO L85 PathProgramCache]: Analyzing trace with hash -360939040, now seen corresponding path program 1 times [2021-12-28 02:14:31,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:14:31,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90369396] [2021-12-28 02:14:31,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:14:31,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:14:31,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:14:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:14:31,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:14:31,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90369396] [2021-12-28 02:14:31,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90369396] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:14:31,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:14:31,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:14:31,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365482017] [2021-12-28 02:14:31,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:14:31,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:14:31,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:14:31,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:14:31,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:14:31,355 INFO L87 Difference]: Start difference. First operand 1595 states and 2594 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:31,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:14:31,377 INFO L93 Difference]: Finished difference Result 1719 states and 2786 transitions. [2021-12-28 02:14:31,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:14:31,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-28 02:14:31,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:14:31,382 INFO L225 Difference]: With dead ends: 1719 [2021-12-28 02:14:31,382 INFO L226 Difference]: Without dead ends: 1651 [2021-12-28 02:14:31,382 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 [2021-12-28 02:14:31,383 INFO L933 BasicCegarLoop]: 1544 mSDtfsCounter, 1480 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:14:31,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1480 Valid, 1609 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:14:31,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2021-12-28 02:14:31,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1649. [2021-12-28 02:14:31,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1647 states have (on average 1.6253794778384942) internal successors, (2677), 1648 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:31,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2677 transitions. [2021-12-28 02:14:31,406 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2677 transitions. Word has length 41 [2021-12-28 02:14:31,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:14:31,407 INFO L470 AbstractCegarLoop]: Abstraction has 1649 states and 2677 transitions. [2021-12-28 02:14:31,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:31,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2677 transitions. [2021-12-28 02:14:31,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-28 02:14:31,408 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:14:31,408 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] [2021-12-28 02:14:31,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 02:14:31,408 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:14:31,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:14:31,409 INFO L85 PathProgramCache]: Analyzing trace with hash 857046358, now seen corresponding path program 1 times [2021-12-28 02:14:31,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:14:31,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73633730] [2021-12-28 02:14:31,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:14:31,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:14:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:14:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:14:31,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:14:31,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73633730] [2021-12-28 02:14:31,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73633730] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:14:31,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:14:31,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:14:31,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891875008] [2021-12-28 02:14:31,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:14:31,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:14:31,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:14:31,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:14:31,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:14:31,448 INFO L87 Difference]: Start difference. First operand 1649 states and 2677 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:31,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:14:31,530 INFO L93 Difference]: Finished difference Result 2381 states and 3811 transitions. [2021-12-28 02:14:31,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:14:31,530 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-28 02:14:31,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:14:31,536 INFO L225 Difference]: With dead ends: 2381 [2021-12-28 02:14:31,537 INFO L226 Difference]: Without dead ends: 2259 [2021-12-28 02:14:31,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:14:31,538 INFO L933 BasicCegarLoop]: 1516 mSDtfsCounter, 4693 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4693 SdHoareTripleChecker+Valid, 1934 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:14:31,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4693 Valid, 1934 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:14:31,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2021-12-28 02:14:31,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 1769. [2021-12-28 02:14:31,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1767 states have (on average 1.6168647425014149) internal successors, (2857), 1768 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:31,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2857 transitions. [2021-12-28 02:14:31,569 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 2857 transitions. Word has length 41 [2021-12-28 02:14:31,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:14:31,569 INFO L470 AbstractCegarLoop]: Abstraction has 1769 states and 2857 transitions. [2021-12-28 02:14:31,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:31,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 2857 transitions. [2021-12-28 02:14:31,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-28 02:14:31,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:14:31,570 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] [2021-12-28 02:14:31,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 02:14:31,571 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:14:31,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:14:31,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1867096070, now seen corresponding path program 1 times [2021-12-28 02:14:31,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:14:31,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138651734] [2021-12-28 02:14:31,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:14:31,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:14:31,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:14:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:14:31,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:14:31,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138651734] [2021-12-28 02:14:31,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138651734] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:14:31,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:14:31,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:14:31,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904802894] [2021-12-28 02:14:31,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:14:31,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:14:31,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:14:31,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:14:31,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:14:31,601 INFO L87 Difference]: Start difference. First operand 1769 states and 2857 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:31,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:14:31,639 INFO L93 Difference]: Finished difference Result 2209 states and 3519 transitions. [2021-12-28 02:14:31,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:14:31,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-28 02:14:31,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:14:31,645 INFO L225 Difference]: With dead ends: 2209 [2021-12-28 02:14:31,645 INFO L226 Difference]: Without dead ends: 1967 [2021-12-28 02:14:31,646 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 [2021-12-28 02:14:31,646 INFO L933 BasicCegarLoop]: 1517 mSDtfsCounter, 1471 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1471 SdHoareTripleChecker+Valid, 1569 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:14:31,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1471 Valid, 1569 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:14:31,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-12-28 02:14:31,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1957. [2021-12-28 02:14:31,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1957 states, 1955 states have (on average 1.5964194373401535) internal successors, (3121), 1956 states have internal predecessors, (3121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:31,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1957 states to 1957 states and 3121 transitions. [2021-12-28 02:14:31,685 INFO L78 Accepts]: Start accepts. Automaton has 1957 states and 3121 transitions. Word has length 43 [2021-12-28 02:14:31,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:14:31,685 INFO L470 AbstractCegarLoop]: Abstraction has 1957 states and 3121 transitions. [2021-12-28 02:14:31,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:31,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1957 states and 3121 transitions. [2021-12-28 02:14:31,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-28 02:14:31,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:14:31,686 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] [2021-12-28 02:14:31,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 02:14:31,686 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:14:31,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:14:31,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1933589582, now seen corresponding path program 1 times [2021-12-28 02:14:31,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:14:31,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282719913] [2021-12-28 02:14:31,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:14:31,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:14:31,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:14:31,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:14:31,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:14:31,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282719913] [2021-12-28 02:14:31,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282719913] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:14:31,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:14:31,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:14:31,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776712452] [2021-12-28 02:14:31,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:14:31,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:14:31,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:14:31,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:14:31,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:14:31,751 INFO L87 Difference]: Start difference. First operand 1957 states and 3121 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:31,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:14:31,818 INFO L93 Difference]: Finished difference Result 2389 states and 3755 transitions. [2021-12-28 02:14:31,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:14:31,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-28 02:14:31,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:14:31,824 INFO L225 Difference]: With dead ends: 2389 [2021-12-28 02:14:31,824 INFO L226 Difference]: Without dead ends: 1959 [2021-12-28 02:14:31,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:14:31,825 INFO L933 BasicCegarLoop]: 1515 mSDtfsCounter, 1531 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1531 SdHoareTripleChecker+Valid, 1680 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:14:31,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1531 Valid, 1680 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:14:31,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-12-28 02:14:31,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1957. [2021-12-28 02:14:31,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1957 states, 1955 states have (on average 1.5923273657289003) internal successors, (3113), 1956 states have internal predecessors, (3113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:31,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1957 states to 1957 states and 3113 transitions. [2021-12-28 02:14:31,865 INFO L78 Accepts]: Start accepts. Automaton has 1957 states and 3113 transitions. Word has length 43 [2021-12-28 02:14:31,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:14:31,866 INFO L470 AbstractCegarLoop]: Abstraction has 1957 states and 3113 transitions. [2021-12-28 02:14:31,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:31,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1957 states and 3113 transitions. [2021-12-28 02:14:31,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-28 02:14:31,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:14:31,867 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] [2021-12-28 02:14:31,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 02:14:31,867 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:14:31,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:14:31,868 INFO L85 PathProgramCache]: Analyzing trace with hash -602988295, now seen corresponding path program 1 times [2021-12-28 02:14:31,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:14:31,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934564161] [2021-12-28 02:14:31,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:14:31,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:14:31,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:14:31,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:14:31,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:14:31,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934564161] [2021-12-28 02:14:31,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934564161] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:14:31,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:14:31,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:14:31,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965606146] [2021-12-28 02:14:31,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:14:31,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:14:31,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:14:31,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:14:31,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:14:31,923 INFO L87 Difference]: Start difference. First operand 1957 states and 3113 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:32,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:14:32,051 INFO L93 Difference]: Finished difference Result 2291 states and 3585 transitions. [2021-12-28 02:14:32,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:14:32,051 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-28 02:14:32,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:14:32,057 INFO L225 Difference]: With dead ends: 2291 [2021-12-28 02:14:32,057 INFO L226 Difference]: Without dead ends: 2289 [2021-12-28 02:14:32,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-28 02:14:32,058 INFO L933 BasicCegarLoop]: 1552 mSDtfsCounter, 396 mSDsluCounter, 8921 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 10473 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:14:32,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 10473 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:14:32,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2021-12-28 02:14:32,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 1981. [2021-12-28 02:14:32,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1979 states have (on average 1.583122789287519) internal successors, (3133), 1980 states have internal predecessors, (3133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:32,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 3133 transitions. [2021-12-28 02:14:32,102 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 3133 transitions. Word has length 44 [2021-12-28 02:14:32,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:14:32,102 INFO L470 AbstractCegarLoop]: Abstraction has 1981 states and 3133 transitions. [2021-12-28 02:14:32,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:32,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 3133 transitions. [2021-12-28 02:14:32,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-28 02:14:32,103 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:14:32,103 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] [2021-12-28 02:14:32,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 02:14:32,103 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:14:32,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:14:32,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1900121563, now seen corresponding path program 1 times [2021-12-28 02:14:32,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:14:32,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171454280] [2021-12-28 02:14:32,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:14:32,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:14:32,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:14:32,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:14:32,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:14:32,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171454280] [2021-12-28 02:14:32,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171454280] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:14:32,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:14:32,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:14:32,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773075754] [2021-12-28 02:14:32,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:14:32,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:14:32,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:14:32,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:14:32,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:14:32,165 INFO L87 Difference]: Start difference. First operand 1981 states and 3133 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:32,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:14:32,220 INFO L93 Difference]: Finished difference Result 2452 states and 3811 transitions. [2021-12-28 02:14:32,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:14:32,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-28 02:14:32,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:14:32,227 INFO L225 Difference]: With dead ends: 2452 [2021-12-28 02:14:32,227 INFO L226 Difference]: Without dead ends: 2185 [2021-12-28 02:14:32,228 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 [2021-12-28 02:14:32,228 INFO L933 BasicCegarLoop]: 1558 mSDtfsCounter, 1485 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 1615 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:14:32,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1485 Valid, 1615 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:14:32,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2185 states. [2021-12-28 02:14:32,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2185 to 2183. [2021-12-28 02:14:32,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2183 states, 2181 states have (on average 1.5639614855570838) internal successors, (3411), 2182 states have internal predecessors, (3411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:32,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2183 states to 2183 states and 3411 transitions. [2021-12-28 02:14:32,285 INFO L78 Accepts]: Start accepts. Automaton has 2183 states and 3411 transitions. Word has length 45 [2021-12-28 02:14:32,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:14:32,286 INFO L470 AbstractCegarLoop]: Abstraction has 2183 states and 3411 transitions. [2021-12-28 02:14:32,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:32,286 INFO L276 IsEmpty]: Start isEmpty. Operand 2183 states and 3411 transitions. [2021-12-28 02:14:32,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-28 02:14:32,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:14:32,287 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:14:32,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 02:14:32,287 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:14:32,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:14:32,288 INFO L85 PathProgramCache]: Analyzing trace with hash -393288849, now seen corresponding path program 1 times [2021-12-28 02:14:32,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:14:32,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496411457] [2021-12-28 02:14:32,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:14:32,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:14:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:14:32,323 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 02:14:32,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:14:32,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496411457] [2021-12-28 02:14:32,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496411457] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:14:32,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:14:32,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:14:32,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456494430] [2021-12-28 02:14:32,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:14:32,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:14:32,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:14:32,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:14:32,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:14:32,325 INFO L87 Difference]: Start difference. First operand 2183 states and 3411 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:32,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:14:32,479 INFO L93 Difference]: Finished difference Result 4287 states and 6363 transitions. [2021-12-28 02:14:32,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:14:32,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 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 [2021-12-28 02:14:32,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:14:32,489 INFO L225 Difference]: With dead ends: 4287 [2021-12-28 02:14:32,489 INFO L226 Difference]: Without dead ends: 3633 [2021-12-28 02:14:32,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:14:32,491 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 3084 mSDsluCounter, 1631 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3084 SdHoareTripleChecker+Valid, 3199 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:14:32,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3084 Valid, 3199 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:14:32,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3633 states. [2021-12-28 02:14:32,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3633 to 2835. [2021-12-28 02:14:32,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2835 states, 2833 states have (on average 1.524532297917402) internal successors, (4319), 2834 states have internal predecessors, (4319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:32,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2835 states to 2835 states and 4319 transitions. [2021-12-28 02:14:32,587 INFO L78 Accepts]: Start accepts. Automaton has 2835 states and 4319 transitions. Word has length 64 [2021-12-28 02:14:32,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:14:32,587 INFO L470 AbstractCegarLoop]: Abstraction has 2835 states and 4319 transitions. [2021-12-28 02:14:32,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:32,587 INFO L276 IsEmpty]: Start isEmpty. Operand 2835 states and 4319 transitions. [2021-12-28 02:14:32,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-28 02:14:32,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:14:32,588 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:14:32,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 02:14:32,589 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:14:32,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:14:32,589 INFO L85 PathProgramCache]: Analyzing trace with hash 2132895631, now seen corresponding path program 1 times [2021-12-28 02:14:32,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:14:32,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850419654] [2021-12-28 02:14:32,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:14:32,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:14:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:14:32,623 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-28 02:14:32,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:14:32,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850419654] [2021-12-28 02:14:32,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850419654] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:14:32,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:14:32,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:14:32,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093743108] [2021-12-28 02:14:32,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:14:32,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:14:32,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:14:32,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:14:32,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:14:32,625 INFO L87 Difference]: Start difference. First operand 2835 states and 4319 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:32,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:14:32,868 INFO L93 Difference]: Finished difference Result 4939 states and 7271 transitions. [2021-12-28 02:14:32,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:14:32,869 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-28 02:14:32,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:14:32,880 INFO L225 Difference]: With dead ends: 4939 [2021-12-28 02:14:32,880 INFO L226 Difference]: Without dead ends: 4285 [2021-12-28 02:14:32,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:14:32,882 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 3078 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3078 SdHoareTripleChecker+Valid, 3217 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:14:32,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3078 Valid, 3217 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:14:32,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4285 states. [2021-12-28 02:14:33,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4285 to 3815. [2021-12-28 02:14:33,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3815 states, 3813 states have (on average 1.4872803566745345) internal successors, (5671), 3814 states have internal predecessors, (5671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:33,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3815 states to 3815 states and 5671 transitions. [2021-12-28 02:14:33,083 INFO L78 Accepts]: Start accepts. Automaton has 3815 states and 5671 transitions. Word has length 64 [2021-12-28 02:14:33,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:14:33,084 INFO L470 AbstractCegarLoop]: Abstraction has 3815 states and 5671 transitions. [2021-12-28 02:14:33,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:33,084 INFO L276 IsEmpty]: Start isEmpty. Operand 3815 states and 5671 transitions. [2021-12-28 02:14:33,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-28 02:14:33,085 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:14:33,085 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:14:33,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 02:14:33,085 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:14:33,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:14:33,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1342668761, now seen corresponding path program 1 times [2021-12-28 02:14:33,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:14:33,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893873082] [2021-12-28 02:14:33,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:14:33,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:14:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:14:33,140 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:14:33,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:14:33,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893873082] [2021-12-28 02:14:33,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893873082] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:14:33,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:14:33,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:14:33,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666700128] [2021-12-28 02:14:33,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:14:33,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:14:33,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:14:33,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:14:33,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:14:33,142 INFO L87 Difference]: Start difference. First operand 3815 states and 5671 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:33,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:14:33,281 INFO L93 Difference]: Finished difference Result 5465 states and 7995 transitions. [2021-12-28 02:14:33,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:14:33,281 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-28 02:14:33,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:14:33,287 INFO L225 Difference]: With dead ends: 5465 [2021-12-28 02:14:33,287 INFO L226 Difference]: Without dead ends: 3179 [2021-12-28 02:14:33,289 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 [2021-12-28 02:14:33,290 INFO L933 BasicCegarLoop]: 1544 mSDtfsCounter, 36 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3048 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:14:33,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 3048 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:14:33,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3179 states. [2021-12-28 02:14:33,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3179 to 3177. [2021-12-28 02:14:33,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3177 states, 3175 states have (on average 1.506771653543307) internal successors, (4784), 3176 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:33,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 4784 transitions. [2021-12-28 02:14:33,426 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 4784 transitions. Word has length 66 [2021-12-28 02:14:33,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:14:33,427 INFO L470 AbstractCegarLoop]: Abstraction has 3177 states and 4784 transitions. [2021-12-28 02:14:33,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:33,427 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 4784 transitions. [2021-12-28 02:14:33,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-28 02:14:33,428 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:14:33,428 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:14:33,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 02:14:33,428 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:14:33,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:14:33,429 INFO L85 PathProgramCache]: Analyzing trace with hash -366937100, now seen corresponding path program 1 times [2021-12-28 02:14:33,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:14:33,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441230708] [2021-12-28 02:14:33,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:14:33,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:14:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:14:33,463 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 02:14:33,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:14:33,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441230708] [2021-12-28 02:14:33,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441230708] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:14:33,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:14:33,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:14:33,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106516151] [2021-12-28 02:14:33,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:14:33,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:14:33,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:14:33,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:14:33,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:14:33,465 INFO L87 Difference]: Start difference. First operand 3177 states and 4784 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:33,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:14:33,694 INFO L93 Difference]: Finished difference Result 4577 states and 6756 transitions. [2021-12-28 02:14:33,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:14:33,694 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-28 02:14:33,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:14:33,700 INFO L225 Difference]: With dead ends: 4577 [2021-12-28 02:14:33,700 INFO L226 Difference]: Without dead ends: 4111 [2021-12-28 02:14:33,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:14:33,701 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 3074 mSDsluCounter, 1647 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3074 SdHoareTripleChecker+Valid, 3215 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:14:33,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3074 Valid, 3215 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:14:33,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4111 states. [2021-12-28 02:14:33,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4111 to 3641. [2021-12-28 02:14:33,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3641 states, 3639 states have (on average 1.4927177796097828) internal successors, (5432), 3640 states have internal predecessors, (5432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:33,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3641 states to 3641 states and 5432 transitions. [2021-12-28 02:14:33,829 INFO L78 Accepts]: Start accepts. Automaton has 3641 states and 5432 transitions. Word has length 66 [2021-12-28 02:14:33,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:14:33,830 INFO L470 AbstractCegarLoop]: Abstraction has 3641 states and 5432 transitions. [2021-12-28 02:14:33,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:33,830 INFO L276 IsEmpty]: Start isEmpty. Operand 3641 states and 5432 transitions. [2021-12-28 02:14:33,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-28 02:14:33,831 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:14:33,831 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 02:14:33,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 02:14:33,832 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:14:33,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:14:33,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1328887140, now seen corresponding path program 1 times [2021-12-28 02:14:33,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:14:33,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222183524] [2021-12-28 02:14:33,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:14:33,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:14:33,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:14:34,004 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:14:34,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:14:34,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222183524] [2021-12-28 02:14:34,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222183524] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:14:34,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712732569] [2021-12-28 02:14:34,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:14:34,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:14:34,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:14:34,017 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) [2021-12-28 02:14:34,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 02:14:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:14:34,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 02:14:34,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:14:34,367 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 02:14:34,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:14:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 02:14:34,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712732569] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:14:34,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 02:14:34,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2021-12-28 02:14:34,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385825323] [2021-12-28 02:14:34,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 02:14:34,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-28 02:14:34,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:14:34,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-28 02:14:34,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-28 02:14:34,535 INFO L87 Difference]: Start difference. First operand 3641 states and 5432 transitions. Second operand has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 18 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:39,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:14:39,026 INFO L93 Difference]: Finished difference Result 24021 states and 33277 transitions. [2021-12-28 02:14:39,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-12-28 02:14:39,027 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 18 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-28 02:14:39,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:14:39,058 INFO L225 Difference]: With dead ends: 24021 [2021-12-28 02:14:39,059 INFO L226 Difference]: Without dead ends: 21931 [2021-12-28 02:14:39,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4630 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2148, Invalid=10062, Unknown=0, NotChecked=0, Total=12210 [2021-12-28 02:14:39,069 INFO L933 BasicCegarLoop]: 1555 mSDtfsCounter, 17183 mSDsluCounter, 5137 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17183 SdHoareTripleChecker+Valid, 6692 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 02:14:39,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17183 Valid, 6692 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-28 02:14:39,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21931 states. [2021-12-28 02:14:39,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21931 to 12554. [2021-12-28 02:14:39,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12554 states, 12552 states have (on average 1.3710165710643722) internal successors, (17209), 12553 states have internal predecessors, (17209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:39,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12554 states to 12554 states and 17209 transitions. [2021-12-28 02:14:39,945 INFO L78 Accepts]: Start accepts. Automaton has 12554 states and 17209 transitions. Word has length 67 [2021-12-28 02:14:39,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:14:39,946 INFO L470 AbstractCegarLoop]: Abstraction has 12554 states and 17209 transitions. [2021-12-28 02:14:39,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 18 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:14:39,946 INFO L276 IsEmpty]: Start isEmpty. Operand 12554 states and 17209 transitions. [2021-12-28 02:14:39,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 02:14:39,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:14:39,947 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:14:39,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-28 02:14:40,163 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,SelfDestructingSolverStorable13 [2021-12-28 02:14:40,164 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:14:40,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:14:40,164 INFO L85 PathProgramCache]: Analyzing trace with hash 620602156, now seen corresponding path program 1 times [2021-12-28 02:14:40,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:14:40,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043217135] [2021-12-28 02:14:40,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:14:40,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:14:40,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:14:40,297 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:14:40,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:14:40,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043217135] [2021-12-28 02:14:40,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043217135] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:14:40,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043521617] [2021-12-28 02:14:40,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:14:40,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:14:40,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:14:40,299 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) [2021-12-28 02:14:40,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 02:14:40,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:14:40,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-28 02:14:40,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:14:41,187 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:14:41,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:14:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:14:41,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043521617] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:14:41,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 02:14:41,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2021-12-28 02:14:41,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002199757] [2021-12-28 02:14:41,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 02:14:41,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-28 02:14:41,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:14:41,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-28 02:14:41,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-12-28 02:14:41,580 INFO L87 Difference]: Start difference. First operand 12554 states and 17209 transitions. Second operand has 25 states, 25 states have (on average 6.88) internal successors, (172), 24 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) [2021-12-28 02:14:56,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:14:56,862 INFO L93 Difference]: Finished difference Result 145542 states and 190775 transitions. [2021-12-28 02:14:56,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-12-28 02:14:56,862 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.88) internal successors, (172), 24 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 68 [2021-12-28 02:14:56,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:14:57,108 INFO L225 Difference]: With dead ends: 145542 [2021-12-28 02:14:57,109 INFO L226 Difference]: Without dead ends: 135357 [2021-12-28 02:14:57,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8692 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3558, Invalid=20934, Unknown=0, NotChecked=0, Total=24492 [2021-12-28 02:14:57,149 INFO L933 BasicCegarLoop]: 1622 mSDtfsCounter, 21760 mSDsluCounter, 8980 mSDsCounter, 0 mSdLazyCounter, 2084 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21760 SdHoareTripleChecker+Valid, 10602 SdHoareTripleChecker+Invalid, 2425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 2084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:14:57,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21760 Valid, 10602 Invalid, 2425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 2084 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-28 02:14:57,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135357 states. [2021-12-28 02:15:02,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135357 to 54011. [2021-12-28 02:15:02,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54011 states, 54009 states have (on average 1.3203725305041751) internal successors, (71312), 54010 states have internal predecessors, (71312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:02,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54011 states to 54011 states and 71312 transitions. [2021-12-28 02:15:02,770 INFO L78 Accepts]: Start accepts. Automaton has 54011 states and 71312 transitions. Word has length 68 [2021-12-28 02:15:02,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:15:02,770 INFO L470 AbstractCegarLoop]: Abstraction has 54011 states and 71312 transitions. [2021-12-28 02:15:02,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.88) internal successors, (172), 24 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) [2021-12-28 02:15:02,770 INFO L276 IsEmpty]: Start isEmpty. Operand 54011 states and 71312 transitions. [2021-12-28 02:15:02,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 02:15:02,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:15:02,777 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:15:02,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 02:15:02,995 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 [2021-12-28 02:15:02,996 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:15:02,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:15:02,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1702537876, now seen corresponding path program 1 times [2021-12-28 02:15:02,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:15:02,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523544570] [2021-12-28 02:15:02,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:15:02,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:15:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:15:03,019 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:15:03,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:15:03,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523544570] [2021-12-28 02:15:03,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523544570] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:15:03,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:15:03,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:15:03,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651523262] [2021-12-28 02:15:03,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:15:03,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:15:03,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:15:03,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:15:03,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:15:03,022 INFO L87 Difference]: Start difference. First operand 54011 states and 71312 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:06,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:15:06,149 INFO L93 Difference]: Finished difference Result 78449 states and 102855 transitions. [2021-12-28 02:15:06,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:15:06,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-28 02:15:06,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:15:06,212 INFO L225 Difference]: With dead ends: 78449 [2021-12-28 02:15:06,212 INFO L226 Difference]: Without dead ends: 31369 [2021-12-28 02:15:06,254 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 [2021-12-28 02:15:06,254 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 26 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 3030 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:15:06,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 3030 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:15:06,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31369 states. [2021-12-28 02:15:08,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31369 to 30941. [2021-12-28 02:15:08,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30941 states, 30939 states have (on average 1.28963444196645) internal successors, (39900), 30940 states have internal predecessors, (39900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:08,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30941 states to 30941 states and 39900 transitions. [2021-12-28 02:15:08,693 INFO L78 Accepts]: Start accepts. Automaton has 30941 states and 39900 transitions. Word has length 68 [2021-12-28 02:15:08,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:15:08,693 INFO L470 AbstractCegarLoop]: Abstraction has 30941 states and 39900 transitions. [2021-12-28 02:15:08,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:08,693 INFO L276 IsEmpty]: Start isEmpty. Operand 30941 states and 39900 transitions. [2021-12-28 02:15:08,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 02:15:08,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:15:08,695 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:15:08,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 02:15:08,695 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:15:08,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:15:08,696 INFO L85 PathProgramCache]: Analyzing trace with hash 455030260, now seen corresponding path program 1 times [2021-12-28 02:15:08,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:15:08,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100415128] [2021-12-28 02:15:08,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:15:08,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:15:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:15:08,721 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:15:08,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:15:08,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100415128] [2021-12-28 02:15:08,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100415128] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:15:08,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:15:08,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 02:15:08,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213963264] [2021-12-28 02:15:08,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:15:08,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:15:08,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:15:08,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:15:08,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 02:15:08,723 INFO L87 Difference]: Start difference. First operand 30941 states and 39900 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:10,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:15:10,335 INFO L93 Difference]: Finished difference Result 46927 states and 60114 transitions. [2021-12-28 02:15:10,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:15:10,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-28 02:15:10,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:15:10,365 INFO L225 Difference]: With dead ends: 46927 [2021-12-28 02:15:10,365 INFO L226 Difference]: Without dead ends: 20863 [2021-12-28 02:15:10,385 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 [2021-12-28 02:15:10,386 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 20 mSDsluCounter, 1492 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 3021 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:15:10,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 3021 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:15:10,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20863 states. [2021-12-28 02:15:12,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20863 to 20861. [2021-12-28 02:15:12,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20861 states, 20859 states have (on average 1.2684692458890647) internal successors, (26459), 20860 states have internal predecessors, (26459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:12,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20861 states to 20861 states and 26459 transitions. [2021-12-28 02:15:12,149 INFO L78 Accepts]: Start accepts. Automaton has 20861 states and 26459 transitions. Word has length 68 [2021-12-28 02:15:12,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:15:12,150 INFO L470 AbstractCegarLoop]: Abstraction has 20861 states and 26459 transitions. [2021-12-28 02:15:12,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:12,150 INFO L276 IsEmpty]: Start isEmpty. Operand 20861 states and 26459 transitions. [2021-12-28 02:15:12,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 02:15:12,151 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:15:12,152 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:15:12,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 02:15:12,152 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:15:12,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:15:12,152 INFO L85 PathProgramCache]: Analyzing trace with hash 530169440, now seen corresponding path program 1 times [2021-12-28 02:15:12,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:15:12,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989581303] [2021-12-28 02:15:12,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:15:12,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:15:12,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:15:12,203 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-28 02:15:12,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:15:12,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989581303] [2021-12-28 02:15:12,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989581303] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:15:12,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:15:12,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:15:12,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374167921] [2021-12-28 02:15:12,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:15:12,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:15:12,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:15:12,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:15:12,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:15:12,205 INFO L87 Difference]: Start difference. First operand 20861 states and 26459 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:14,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:15:14,013 INFO L93 Difference]: Finished difference Result 36624 states and 46184 transitions. [2021-12-28 02:15:14,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 02:15:14,014 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-28 02:15:14,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:15:14,037 INFO L225 Difference]: With dead ends: 36624 [2021-12-28 02:15:14,037 INFO L226 Difference]: Without dead ends: 17377 [2021-12-28 02:15:14,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:15:14,055 INFO L933 BasicCegarLoop]: 1493 mSDtfsCounter, 4507 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4507 SdHoareTripleChecker+Valid, 2968 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:15:14,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4507 Valid, 2968 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:15:14,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17377 states. [2021-12-28 02:15:15,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17377 to 17377. [2021-12-28 02:15:15,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17377 states, 17375 states have (on average 1.2587625899280575) internal successors, (21871), 17376 states have internal predecessors, (21871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:15,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17377 states to 17377 states and 21871 transitions. [2021-12-28 02:15:15,533 INFO L78 Accepts]: Start accepts. Automaton has 17377 states and 21871 transitions. Word has length 68 [2021-12-28 02:15:15,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:15:15,533 INFO L470 AbstractCegarLoop]: Abstraction has 17377 states and 21871 transitions. [2021-12-28 02:15:15,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:15,534 INFO L276 IsEmpty]: Start isEmpty. Operand 17377 states and 21871 transitions. [2021-12-28 02:15:15,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 02:15:15,535 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:15:15,535 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:15:15,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-28 02:15:15,535 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:15:15,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:15:15,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1360814688, now seen corresponding path program 1 times [2021-12-28 02:15:15,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:15:15,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487833341] [2021-12-28 02:15:15,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:15:15,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:15:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:15:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-28 02:15:15,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:15:15,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487833341] [2021-12-28 02:15:15,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487833341] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:15:15,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:15:15,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:15:15,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901930493] [2021-12-28 02:15:15,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:15:15,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:15:15,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:15:15,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:15:15,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:15:15,589 INFO L87 Difference]: Start difference. First operand 17377 states and 21871 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 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) [2021-12-28 02:15:16,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:15:16,781 INFO L93 Difference]: Finished difference Result 28988 states and 36122 transitions. [2021-12-28 02:15:16,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 02:15:16,782 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 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 68 [2021-12-28 02:15:16,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:15:16,797 INFO L225 Difference]: With dead ends: 28988 [2021-12-28 02:15:16,798 INFO L226 Difference]: Without dead ends: 13257 [2021-12-28 02:15:16,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:15:16,810 INFO L933 BasicCegarLoop]: 1493 mSDtfsCounter, 4558 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4558 SdHoareTripleChecker+Valid, 2955 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:15:16,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4558 Valid, 2955 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:15:16,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13257 states. [2021-12-28 02:15:17,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13257 to 13257. [2021-12-28 02:15:17,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13257 states, 13255 states have (on average 1.2516031686156168) internal successors, (16590), 13256 states have internal predecessors, (16590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:18,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13257 states to 13257 states and 16590 transitions. [2021-12-28 02:15:18,004 INFO L78 Accepts]: Start accepts. Automaton has 13257 states and 16590 transitions. Word has length 68 [2021-12-28 02:15:18,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:15:18,004 INFO L470 AbstractCegarLoop]: Abstraction has 13257 states and 16590 transitions. [2021-12-28 02:15:18,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 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) [2021-12-28 02:15:18,005 INFO L276 IsEmpty]: Start isEmpty. Operand 13257 states and 16590 transitions. [2021-12-28 02:15:18,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 02:15:18,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:15:18,006 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:15:18,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-28 02:15:18,006 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:15:18,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:15:18,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1355942016, now seen corresponding path program 1 times [2021-12-28 02:15:18,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:15:18,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598658398] [2021-12-28 02:15:18,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:15:18,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:15:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:15:18,043 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-28 02:15:18,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:15:18,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598658398] [2021-12-28 02:15:18,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598658398] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:15:18,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:15:18,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:15:18,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641532703] [2021-12-28 02:15:18,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:15:18,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:15:18,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:15:18,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:15:18,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:15:18,045 INFO L87 Difference]: Start difference. First operand 13257 states and 16590 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:19,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:15:19,028 INFO L93 Difference]: Finished difference Result 22263 states and 27515 transitions. [2021-12-28 02:15:19,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 02:15:19,029 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-28 02:15:19,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:15:19,042 INFO L225 Difference]: With dead ends: 22263 [2021-12-28 02:15:19,042 INFO L226 Difference]: Without dead ends: 10573 [2021-12-28 02:15:19,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:15:19,052 INFO L933 BasicCegarLoop]: 1493 mSDtfsCounter, 4563 mSDsluCounter, 1460 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4563 SdHoareTripleChecker+Valid, 2953 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:15:19,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4563 Valid, 2953 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:15:19,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10573 states. [2021-12-28 02:15:20,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10573 to 10573. [2021-12-28 02:15:20,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10573 states, 10571 states have (on average 1.2554157600983824) internal successors, (13271), 10572 states have internal predecessors, (13271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:20,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10573 states to 10573 states and 13271 transitions. [2021-12-28 02:15:20,070 INFO L78 Accepts]: Start accepts. Automaton has 10573 states and 13271 transitions. Word has length 68 [2021-12-28 02:15:20,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:15:20,070 INFO L470 AbstractCegarLoop]: Abstraction has 10573 states and 13271 transitions. [2021-12-28 02:15:20,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:15:20,070 INFO L276 IsEmpty]: Start isEmpty. Operand 10573 states and 13271 transitions. [2021-12-28 02:15:20,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-28 02:15:20,071 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:15:20,071 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 02:15:20,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-28 02:15:20,072 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:15:20,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:15:20,073 INFO L85 PathProgramCache]: Analyzing trace with hash -576881103, now seen corresponding path program 1 times [2021-12-28 02:15:20,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:15:20,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061938785] [2021-12-28 02:15:20,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:15:20,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:15:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:15:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:15:20,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:15:20,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061938785] [2021-12-28 02:15:20,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061938785] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:15:20,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342272347] [2021-12-28 02:15:20,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:15:20,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:15:20,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:15:20,339 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) [2021-12-28 02:15:20,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 02:15:20,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:15:20,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-28 02:15:20,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:15:22,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:15:22,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:15:23,145 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:15:23,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342272347] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:15:23,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 02:15:23,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 31 [2021-12-28 02:15:23,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025584360] [2021-12-28 02:15:23,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 02:15:23,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-28 02:15:23,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:15:23,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-28 02:15:23,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-12-28 02:15:23,164 INFO L87 Difference]: Start difference. First operand 10573 states and 13271 transitions. Second operand has 31 states, 31 states have (on average 6.096774193548387) internal successors, (189), 31 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)