./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label02.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 d75a2391f4a22066ef2bb1ed925207911a0418d8f665bed417e6b9b74205fcd2 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 14:44:46,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 14:44:46,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 14:44:46,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 14:44:46,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 14:44:46,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 14:44:46,127 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 14:44:46,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 14:44:46,131 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 14:44:46,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 14:44:46,136 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 14:44:46,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 14:44:46,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 14:44:46,139 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 14:44:46,141 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 14:44:46,143 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 14:44:46,143 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 14:44:46,144 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 14:44:46,148 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 14:44:46,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 14:44:46,154 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 14:44:46,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 14:44:46,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 14:44:46,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 14:44:46,160 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 14:44:46,160 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 14:44:46,161 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 14:44:46,162 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 14:44:46,162 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 14:44:46,162 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 14:44:46,163 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 14:44:46,163 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 14:44:46,165 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 14:44:46,165 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 14:44:46,166 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 14:44:46,166 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 14:44:46,167 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 14:44:46,167 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 14:44:46,167 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 14:44:46,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 14:44:46,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 14:44:46,169 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 14:44:46,198 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 14:44:46,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 14:44:46,200 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 14:44:46,200 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 14:44:46,201 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 14:44:46,201 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 14:44:46,202 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 14:44:46,202 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 14:44:46,202 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 14:44:46,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 14:44:46,203 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 14:44:46,203 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 14:44:46,203 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 14:44:46,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 14:44:46,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 14:44:46,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 14:44:46,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 14:44:46,204 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 14:44:46,204 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 14:44:46,205 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 14:44:46,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 14:44:46,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 14:44:46,205 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 14:44:46,205 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 14:44:46,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:44:46,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 14:44:46,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 14:44:46,206 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 14:44:46,206 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 14:44:46,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 14:44:46,206 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 14:44:46,207 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 14:44:46,207 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 14:44:46,207 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 14:44:46,207 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d75a2391f4a22066ef2bb1ed925207911a0418d8f665bed417e6b9b74205fcd2 [2021-12-21 14:44:46,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 14:44:46,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 14:44:46,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 14:44:46,405 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 14:44:46,406 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 14:44:46,407 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label02.c [2021-12-21 14:44:46,456 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab413d031/d225e2d605b34088851113028fa42281/FLAG4d7f68ea0 [2021-12-21 14:44:47,148 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 14:44:47,148 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label02.c [2021-12-21 14:44:47,173 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab413d031/d225e2d605b34088851113028fa42281/FLAG4d7f68ea0 [2021-12-21 14:44:47,487 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab413d031/d225e2d605b34088851113028fa42281 [2021-12-21 14:44:47,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 14:44:47,490 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 14:44:47,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 14:44:47,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 14:44:47,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 14:44:47,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:44:47" (1/1) ... [2021-12-21 14:44:47,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69c2fea9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:44:47, skipping insertion in model container [2021-12-21 14:44:47,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:44:47" (1/1) ... [2021-12-21 14:44:47,509 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 14:44:47,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 14:44:48,300 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.7.ufo.UNBOUNDED.pals+Problem12_label02.c[20454,20467] [2021-12-21 14:44:48,340 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.7.ufo.UNBOUNDED.pals+Problem12_label02.c[27744,27757] [2021-12-21 14:44:48,777 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:44:48,784 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 14:44:48,814 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.7.ufo.UNBOUNDED.pals+Problem12_label02.c[20454,20467] [2021-12-21 14:44:48,824 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.7.ufo.UNBOUNDED.pals+Problem12_label02.c[27744,27757] [2021-12-21 14:44:49,102 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:44:49,124 INFO L208 MainTranslator]: Completed translation [2021-12-21 14:44:49,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:44:49 WrapperNode [2021-12-21 14:44:49,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 14:44:49,126 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 14:44:49,126 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 14:44:49,126 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 14:44:49,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:44:49" (1/1) ... [2021-12-21 14:44:49,176 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:44:49" (1/1) ... [2021-12-21 14:44:49,419 INFO L137 Inliner]: procedures = 39, calls = 24, calls flagged for inlining = 19, calls inlined = 19, statements flattened = 5208 [2021-12-21 14:44:49,419 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 14:44:49,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 14:44:49,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 14:44:49,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 14:44:49,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:44:49" (1/1) ... [2021-12-21 14:44:49,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:44:49" (1/1) ... [2021-12-21 14:44:49,539 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:44:49" (1/1) ... [2021-12-21 14:44:49,539 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:44:49" (1/1) ... [2021-12-21 14:44:49,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:44:49" (1/1) ... [2021-12-21 14:44:49,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:44:49" (1/1) ... [2021-12-21 14:44:49,670 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:44:49" (1/1) ... [2021-12-21 14:44:49,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 14:44:49,820 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 14:44:49,820 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 14:44:49,820 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 14:44:49,822 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:44:49" (1/1) ... [2021-12-21 14:44:49,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:44:49,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:44:49,868 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 14:44:49,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 14:44:49,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 14:44:49,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 14:44:49,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 14:44:49,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 14:44:50,050 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 14:44:50,051 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 14:44:52,643 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 14:44:52,656 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 14:44:52,657 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 14:44:52,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:44:52 BoogieIcfgContainer [2021-12-21 14:44:52,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 14:44:52,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 14:44:52,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 14:44:52,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 14:44:52,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 02:44:47" (1/3) ... [2021-12-21 14:44:52,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2b3e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:44:52, skipping insertion in model container [2021-12-21 14:44:52,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:44:49" (2/3) ... [2021-12-21 14:44:52,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2b3e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:44:52, skipping insertion in model container [2021-12-21 14:44:52,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:44:52" (3/3) ... [2021-12-21 14:44:52,665 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.UNBOUNDED.pals+Problem12_label02.c [2021-12-21 14:44:52,668 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 14:44:52,668 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-21 14:44:52,703 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 14:44:52,707 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 14:44:52,707 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-21 14:44:52,734 INFO L276 IsEmpty]: Start isEmpty. Operand has 946 states, 943 states have (on average 1.8971367974549311) internal successors, (1789), 945 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:52,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-21 14:44:52,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:44:52,741 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] [2021-12-21 14:44:52,741 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:44:52,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:44:52,745 INFO L85 PathProgramCache]: Analyzing trace with hash -949343158, now seen corresponding path program 1 times [2021-12-21 14:44:52,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:44:52,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681888634] [2021-12-21 14:44:52,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:44:52,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:44:52,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:44:52,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:44:52,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:44:52,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681888634] [2021-12-21 14:44:52,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681888634] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:44:52,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:44:52,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 14:44:52,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769685674] [2021-12-21 14:44:52,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:44:52,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 14:44:52,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:44:52,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 14:44:52,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 14:44:52,907 INFO L87 Difference]: Start difference. First operand has 946 states, 943 states have (on average 1.8971367974549311) internal successors, (1789), 945 states have internal predecessors, (1789), 0 states have call successors, (0), 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 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:52,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:44:52,963 INFO L93 Difference]: Finished difference Result 1834 states and 3468 transitions. [2021-12-21 14:44:52,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 14:44:52,965 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-21 14:44:52,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:44:52,977 INFO L225 Difference]: With dead ends: 1834 [2021-12-21 14:44:52,978 INFO L226 Difference]: Without dead ends: 880 [2021-12-21 14:44:52,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 14:44:52,984 INFO L933 BasicCegarLoop]: 1720 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1720 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:44:52,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1720 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:44:53,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-12-21 14:44:53,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 880. [2021-12-21 14:44:53,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 878 states have (on average 1.8861047835990887) internal successors, (1656), 879 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:53,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1656 transitions. [2021-12-21 14:44:53,088 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1656 transitions. Word has length 42 [2021-12-21 14:44:53,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:44:53,088 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 1656 transitions. [2021-12-21 14:44:53,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:53,089 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1656 transitions. [2021-12-21 14:44:53,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-21 14:44:53,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:44:53,090 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] [2021-12-21 14:44:53,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 14:44:53,091 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:44:53,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:44:53,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1343709944, now seen corresponding path program 1 times [2021-12-21 14:44:53,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:44:53,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614493436] [2021-12-21 14:44:53,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:44:53,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:44:53,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:44:53,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:44:53,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:44:53,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614493436] [2021-12-21 14:44:53,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614493436] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:44:53,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:44:53,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:44:53,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912863425] [2021-12-21 14:44:53,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:44:53,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:44:53,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:44:53,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:44:53,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:44:53,154 INFO L87 Difference]: Start difference. First operand 880 states and 1656 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:53,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:44:53,225 INFO L93 Difference]: Finished difference Result 954 states and 1771 transitions. [2021-12-21 14:44:53,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:44:53,226 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-21 14:44:53,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:44:53,229 INFO L225 Difference]: With dead ends: 954 [2021-12-21 14:44:53,229 INFO L226 Difference]: Without dead ends: 880 [2021-12-21 14:44:53,229 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 [2021-12-21 14:44:53,230 INFO L933 BasicCegarLoop]: 1654 mSDtfsCounter, 3 mSDsluCounter, 4909 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6563 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:44:53,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6563 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:44:53,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-12-21 14:44:53,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 880. [2021-12-21 14:44:53,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 878 states have (on average 1.8291571753986333) internal successors, (1606), 879 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:53,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1606 transitions. [2021-12-21 14:44:53,247 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1606 transitions. Word has length 42 [2021-12-21 14:44:53,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:44:53,247 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 1606 transitions. [2021-12-21 14:44:53,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:53,248 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1606 transitions. [2021-12-21 14:44:53,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-21 14:44:53,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:44:53,249 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:44:53,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 14:44:53,249 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:44:53,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:44:53,250 INFO L85 PathProgramCache]: Analyzing trace with hash -291494936, now seen corresponding path program 1 times [2021-12-21 14:44:53,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:44:53,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048781507] [2021-12-21 14:44:53,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:44:53,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:44:53,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:44:53,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:44:53,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:44:53,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048781507] [2021-12-21 14:44:53,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048781507] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:44:53,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:44:53,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:44:53,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440726480] [2021-12-21 14:44:53,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:44:53,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:44:53,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:44:53,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:44:53,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:44:53,359 INFO L87 Difference]: Start difference. First operand 880 states and 1606 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:57,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:44:57,945 INFO L93 Difference]: Finished difference Result 3135 states and 5915 transitions. [2021-12-21 14:44:57,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 14:44:57,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-21 14:44:57,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:44:57,966 INFO L225 Difference]: With dead ends: 3135 [2021-12-21 14:44:57,967 INFO L226 Difference]: Without dead ends: 2382 [2021-12-21 14:44:57,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:44:57,969 INFO L933 BasicCegarLoop]: 860 mSDtfsCounter, 2509 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5518 mSolverCounterSat, 1100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2509 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 6618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1100 IncrementalHoareTripleChecker+Valid, 5518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-21 14:44:57,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2509 Valid, 878 Invalid, 6618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1100 Valid, 5518 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-12-21 14:44:57,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2021-12-21 14:44:58,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 2382. [2021-12-21 14:44:58,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2382 states, 2380 states have (on average 1.5680672268907563) internal successors, (3732), 2381 states have internal predecessors, (3732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:58,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 3732 transitions. [2021-12-21 14:44:58,033 INFO L78 Accepts]: Start accepts. Automaton has 2382 states and 3732 transitions. Word has length 63 [2021-12-21 14:44:58,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:44:58,034 INFO L470 AbstractCegarLoop]: Abstraction has 2382 states and 3732 transitions. [2021-12-21 14:44:58,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:58,035 INFO L276 IsEmpty]: Start isEmpty. Operand 2382 states and 3732 transitions. [2021-12-21 14:44:58,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 14:44:58,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:44:58,041 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:44:58,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 14:44:58,042 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:44:58,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:44:58,043 INFO L85 PathProgramCache]: Analyzing trace with hash -461668761, now seen corresponding path program 1 times [2021-12-21 14:44:58,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:44:58,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613234459] [2021-12-21 14:44:58,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:44:58,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:44:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:44:58,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:44:58,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:44:58,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613234459] [2021-12-21 14:44:58,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613234459] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:44:58,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:44:58,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:44:58,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587016705] [2021-12-21 14:44:58,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:44:58,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:44:58,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:44:58,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:44:58,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:44:58,150 INFO L87 Difference]: Start difference. First operand 2382 states and 3732 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:58,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:44:58,177 INFO L93 Difference]: Finished difference Result 2516 states and 3944 transitions. [2021-12-21 14:44:58,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:44:58,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-12-21 14:44:58,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:44:58,184 INFO L225 Difference]: With dead ends: 2516 [2021-12-21 14:44:58,185 INFO L226 Difference]: Without dead ends: 2446 [2021-12-21 14:44:58,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:44:58,186 INFO L933 BasicCegarLoop]: 1674 mSDtfsCounter, 1532 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1532 SdHoareTripleChecker+Valid, 1791 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 [2021-12-21 14:44:58,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1532 Valid, 1791 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:44:58,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2021-12-21 14:44:58,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2444. [2021-12-21 14:44:58,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2444 states, 2442 states have (on average 1.5687960687960687) internal successors, (3831), 2443 states have internal predecessors, (3831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:58,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2444 states to 2444 states and 3831 transitions. [2021-12-21 14:44:58,227 INFO L78 Accepts]: Start accepts. Automaton has 2444 states and 3831 transitions. Word has length 91 [2021-12-21 14:44:58,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:44:58,227 INFO L470 AbstractCegarLoop]: Abstraction has 2444 states and 3831 transitions. [2021-12-21 14:44:58,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:58,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2444 states and 3831 transitions. [2021-12-21 14:44:58,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 14:44:58,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:44:58,230 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:44:58,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 14:44:58,230 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:44:58,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:44:58,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1207251491, now seen corresponding path program 1 times [2021-12-21 14:44:58,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:44:58,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240227774] [2021-12-21 14:44:58,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:44:58,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:44:58,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:44:58,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:44:58,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:44:58,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240227774] [2021-12-21 14:44:58,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240227774] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:44:58,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:44:58,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:44:58,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333531913] [2021-12-21 14:44:58,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:44:58,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:44:58,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:44:58,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:44:58,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:44:58,305 INFO L87 Difference]: Start difference. First operand 2444 states and 3831 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:58,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:44:58,334 INFO L93 Difference]: Finished difference Result 2696 states and 4231 transitions. [2021-12-21 14:44:58,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:44:58,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-12-21 14:44:58,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:44:58,342 INFO L225 Difference]: With dead ends: 2696 [2021-12-21 14:44:58,342 INFO L226 Difference]: Without dead ends: 2564 [2021-12-21 14:44:58,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:44:58,344 INFO L933 BasicCegarLoop]: 1669 mSDtfsCounter, 1528 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1528 SdHoareTripleChecker+Valid, 1790 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 [2021-12-21 14:44:58,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1528 Valid, 1790 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:44:58,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2564 states. [2021-12-21 14:44:58,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2564 to 2562. [2021-12-21 14:44:58,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2562 states, 2560 states have (on average 1.56953125) internal successors, (4018), 2561 states have internal predecessors, (4018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:58,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2562 states to 2562 states and 4018 transitions. [2021-12-21 14:44:58,387 INFO L78 Accepts]: Start accepts. Automaton has 2562 states and 4018 transitions. Word has length 91 [2021-12-21 14:44:58,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:44:58,387 INFO L470 AbstractCegarLoop]: Abstraction has 2562 states and 4018 transitions. [2021-12-21 14:44:58,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:58,388 INFO L276 IsEmpty]: Start isEmpty. Operand 2562 states and 4018 transitions. [2021-12-21 14:44:58,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 14:44:58,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:44:58,388 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:44:58,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 14:44:58,389 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:44:58,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:44:58,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1147684947, now seen corresponding path program 1 times [2021-12-21 14:44:58,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:44:58,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951582488] [2021-12-21 14:44:58,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:44:58,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:44:58,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:44:58,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:44:58,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:44:58,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951582488] [2021-12-21 14:44:58,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951582488] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:44:58,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:44:58,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:44:58,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239245162] [2021-12-21 14:44:58,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:44:58,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:44:58,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:44:58,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:44:58,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:44:58,431 INFO L87 Difference]: Start difference. First operand 2562 states and 4018 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:58,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:44:58,466 INFO L93 Difference]: Finished difference Result 3038 states and 4772 transitions. [2021-12-21 14:44:58,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:44:58,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-12-21 14:44:58,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:44:58,475 INFO L225 Difference]: With dead ends: 3038 [2021-12-21 14:44:58,476 INFO L226 Difference]: Without dead ends: 2788 [2021-12-21 14:44:58,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:44:58,478 INFO L933 BasicCegarLoop]: 1664 mSDtfsCounter, 1524 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1524 SdHoareTripleChecker+Valid, 1789 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 [2021-12-21 14:44:58,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1524 Valid, 1789 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:44:58,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2788 states. [2021-12-21 14:44:58,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2788 to 2786. [2021-12-21 14:44:58,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2786 states, 2784 states have (on average 1.569683908045977) internal successors, (4370), 2785 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:58,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2786 states to 2786 states and 4370 transitions. [2021-12-21 14:44:58,628 INFO L78 Accepts]: Start accepts. Automaton has 2786 states and 4370 transitions. Word has length 91 [2021-12-21 14:44:58,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:44:58,629 INFO L470 AbstractCegarLoop]: Abstraction has 2786 states and 4370 transitions. [2021-12-21 14:44:58,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:58,630 INFO L276 IsEmpty]: Start isEmpty. Operand 2786 states and 4370 transitions. [2021-12-21 14:44:58,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 14:44:58,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:44:58,630 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:44:58,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 14:44:58,631 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:44:58,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:44:58,632 INFO L85 PathProgramCache]: Analyzing trace with hash -446599735, now seen corresponding path program 1 times [2021-12-21 14:44:58,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:44:58,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597250803] [2021-12-21 14:44:58,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:44:58,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:44:58,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:44:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:44:58,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:44:58,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597250803] [2021-12-21 14:44:58,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597250803] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:44:58,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:44:58,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:44:58,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814032997] [2021-12-21 14:44:58,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:44:58,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:44:58,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:44:58,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:44:58,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:44:58,671 INFO L87 Difference]: Start difference. First operand 2786 states and 4370 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:58,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:44:58,713 INFO L93 Difference]: Finished difference Result 3686 states and 5788 transitions. [2021-12-21 14:44:58,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:44:58,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-12-21 14:44:58,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:44:58,721 INFO L225 Difference]: With dead ends: 3686 [2021-12-21 14:44:58,721 INFO L226 Difference]: Without dead ends: 3212 [2021-12-21 14:44:58,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:44:58,722 INFO L933 BasicCegarLoop]: 1659 mSDtfsCounter, 1520 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 1788 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 [2021-12-21 14:44:58,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1520 Valid, 1788 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:44:58,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3212 states. [2021-12-21 14:44:58,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3212 to 3210. [2021-12-21 14:44:58,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3210 states, 3208 states have (on average 1.5679551122194513) internal successors, (5030), 3209 states have internal predecessors, (5030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:58,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3210 states to 3210 states and 5030 transitions. [2021-12-21 14:44:58,777 INFO L78 Accepts]: Start accepts. Automaton has 3210 states and 5030 transitions. Word has length 91 [2021-12-21 14:44:58,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:44:58,777 INFO L470 AbstractCegarLoop]: Abstraction has 3210 states and 5030 transitions. [2021-12-21 14:44:58,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:58,777 INFO L276 IsEmpty]: Start isEmpty. Operand 3210 states and 5030 transitions. [2021-12-21 14:44:58,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 14:44:58,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:44:58,778 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:44:58,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 14:44:58,778 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:44:58,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:44:58,779 INFO L85 PathProgramCache]: Analyzing trace with hash -108806593, now seen corresponding path program 1 times [2021-12-21 14:44:58,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:44:58,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813794329] [2021-12-21 14:44:58,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:44:58,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:44:58,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:44:58,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:44:58,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:44:58,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813794329] [2021-12-21 14:44:58,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813794329] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:44:58,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:44:58,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:44:58,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691427241] [2021-12-21 14:44:58,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:44:58,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:44:58,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:44:58,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:44:58,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:44:58,837 INFO L87 Difference]: Start difference. First operand 3210 states and 5030 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:58,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:44:58,964 INFO L93 Difference]: Finished difference Result 4910 states and 7688 transitions. [2021-12-21 14:44:58,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:44:58,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-12-21 14:44:58,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:44:58,979 INFO L225 Difference]: With dead ends: 4910 [2021-12-21 14:44:58,979 INFO L226 Difference]: Without dead ends: 4012 [2021-12-21 14:44:58,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:44:58,982 INFO L933 BasicCegarLoop]: 1654 mSDtfsCounter, 1516 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 1787 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 [2021-12-21 14:44:58,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1516 Valid, 1787 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:44:58,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4012 states. [2021-12-21 14:44:59,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4012 to 4010. [2021-12-21 14:44:59,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4010 states, 4008 states have (on average 1.562375249500998) internal successors, (6262), 4009 states have internal predecessors, (6262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:59,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4010 states to 4010 states and 6262 transitions. [2021-12-21 14:44:59,096 INFO L78 Accepts]: Start accepts. Automaton has 4010 states and 6262 transitions. Word has length 91 [2021-12-21 14:44:59,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:44:59,097 INFO L470 AbstractCegarLoop]: Abstraction has 4010 states and 6262 transitions. [2021-12-21 14:44:59,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:59,097 INFO L276 IsEmpty]: Start isEmpty. Operand 4010 states and 6262 transitions. [2021-12-21 14:44:59,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 14:44:59,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:44:59,102 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:44:59,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 14:44:59,102 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:44:59,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:44:59,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1109178805, now seen corresponding path program 1 times [2021-12-21 14:44:59,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:44:59,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664959193] [2021-12-21 14:44:59,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:44:59,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:44:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:44:59,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:44:59,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:44:59,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664959193] [2021-12-21 14:44:59,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664959193] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:44:59,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:44:59,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 14:44:59,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915406585] [2021-12-21 14:44:59,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:44:59,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 14:44:59,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:44:59,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 14:44:59,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:44:59,242 INFO L87 Difference]: Start difference. First operand 4010 states and 6262 transitions. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:45:00,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:45:00,790 INFO L93 Difference]: Finished difference Result 27782 states and 43236 transitions. [2021-12-21 14:45:00,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:45:00,791 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-12-21 14:45:00,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:45:00,855 INFO L225 Difference]: With dead ends: 27782 [2021-12-21 14:45:00,855 INFO L226 Difference]: Without dead ends: 26084 [2021-12-21 14:45:00,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-12-21 14:45:00,866 INFO L933 BasicCegarLoop]: 1600 mSDtfsCounter, 12616 mSDsluCounter, 2508 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12616 SdHoareTripleChecker+Valid, 4108 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:45:00,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12616 Valid, 4108 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:45:00,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26084 states. [2021-12-21 14:45:01,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26084 to 5706. [2021-12-21 14:45:01,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5706 states, 5704 states have (on average 1.5494389901823282) internal successors, (8838), 5705 states have internal predecessors, (8838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:45:01,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5706 states to 5706 states and 8838 transitions. [2021-12-21 14:45:01,259 INFO L78 Accepts]: Start accepts. Automaton has 5706 states and 8838 transitions. Word has length 91 [2021-12-21 14:45:01,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:45:01,259 INFO L470 AbstractCegarLoop]: Abstraction has 5706 states and 8838 transitions. [2021-12-21 14:45:01,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:45:01,260 INFO L276 IsEmpty]: Start isEmpty. Operand 5706 states and 8838 transitions. [2021-12-21 14:45:01,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-21 14:45:01,261 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:45:01,261 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:45:01,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 14:45:01,263 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:45:01,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:45:01,264 INFO L85 PathProgramCache]: Analyzing trace with hash -646747483, now seen corresponding path program 1 times [2021-12-21 14:45:01,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:45:01,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051974165] [2021-12-21 14:45:01,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:45:01,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:45:01,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:45:01,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:45:01,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:45:01,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051974165] [2021-12-21 14:45:01,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051974165] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:45:01,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:45:01,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:45:01,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952216026] [2021-12-21 14:45:01,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:45:01,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:45:01,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:45:01,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:45:01,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:45:01,326 INFO L87 Difference]: Start difference. First operand 5706 states and 8838 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:45:01,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:45:01,786 INFO L93 Difference]: Finished difference Result 12142 states and 18664 transitions. [2021-12-21 14:45:01,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:45:01,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-12-21 14:45:01,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:45:01,801 INFO L225 Difference]: With dead ends: 12142 [2021-12-21 14:45:01,802 INFO L226 Difference]: Without dead ends: 8748 [2021-12-21 14:45:01,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:45:01,808 INFO L933 BasicCegarLoop]: 1602 mSDtfsCounter, 1507 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 1706 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 [2021-12-21 14:45:01,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1507 Valid, 1706 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:45:01,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8748 states. [2021-12-21 14:45:02,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8748 to 8682. [2021-12-21 14:45:02,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8682 states, 8680 states have (on average 1.5232718894009216) internal successors, (13222), 8681 states have internal predecessors, (13222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:45:02,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8682 states to 8682 states and 13222 transitions. [2021-12-21 14:45:02,245 INFO L78 Accepts]: Start accepts. Automaton has 8682 states and 13222 transitions. Word has length 93 [2021-12-21 14:45:02,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:45:02,245 INFO L470 AbstractCegarLoop]: Abstraction has 8682 states and 13222 transitions. [2021-12-21 14:45:02,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:45:02,245 INFO L276 IsEmpty]: Start isEmpty. Operand 8682 states and 13222 transitions. [2021-12-21 14:45:02,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-21 14:45:02,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:45:02,246 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:45:02,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 14:45:02,247 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:45:02,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:45:02,248 INFO L85 PathProgramCache]: Analyzing trace with hash -580253971, now seen corresponding path program 1 times [2021-12-21 14:45:02,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:45:02,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262957097] [2021-12-21 14:45:02,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:45:02,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:45:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:45:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:45:02,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:45:02,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262957097] [2021-12-21 14:45:02,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262957097] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:45:02,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:45:02,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 14:45:02,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142167752] [2021-12-21 14:45:02,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:45:02,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 14:45:02,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:45:02,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 14:45:02,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:45:02,468 INFO L87 Difference]: Start difference. First operand 8682 states and 13222 transitions. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:45:03,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:45:03,166 INFO L93 Difference]: Finished difference Result 15054 states and 22824 transitions. [2021-12-21 14:45:03,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 14:45:03,167 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-12-21 14:45:03,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:45:03,183 INFO L225 Difference]: With dead ends: 15054 [2021-12-21 14:45:03,183 INFO L226 Difference]: Without dead ends: 8684 [2021-12-21 14:45:03,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-12-21 14:45:03,194 INFO L933 BasicCegarLoop]: 1644 mSDtfsCounter, 4941 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4941 SdHoareTripleChecker+Valid, 2298 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:45:03,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4941 Valid, 2298 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:45:03,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8684 states. [2021-12-21 14:45:03,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8684 to 8682. [2021-12-21 14:45:03,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8682 states, 8680 states have (on average 1.5158986175115208) internal successors, (13158), 8681 states have internal predecessors, (13158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:45:03,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8682 states to 8682 states and 13158 transitions. [2021-12-21 14:45:03,730 INFO L78 Accepts]: Start accepts. Automaton has 8682 states and 13158 transitions. Word has length 93 [2021-12-21 14:45:03,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:45:03,731 INFO L470 AbstractCegarLoop]: Abstraction has 8682 states and 13158 transitions. [2021-12-21 14:45:03,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:45:03,731 INFO L276 IsEmpty]: Start isEmpty. Operand 8682 states and 13158 transitions. [2021-12-21 14:45:03,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-21 14:45:03,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:45:03,732 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:45:03,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 14:45:03,733 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:45:03,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:45:03,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1326262359, now seen corresponding path program 1 times [2021-12-21 14:45:03,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:45:03,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150629337] [2021-12-21 14:45:03,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:45:03,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:45:03,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:45:03,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:45:03,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:45:03,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150629337] [2021-12-21 14:45:03,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150629337] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:45:03,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:45:03,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:45:03,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534888634] [2021-12-21 14:45:03,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:45:03,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:45:03,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:45:03,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:45:03,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:45:03,773 INFO L87 Difference]: Start difference. First operand 8682 states and 13158 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:45:04,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:45:04,626 INFO L93 Difference]: Finished difference Result 20654 states and 30952 transitions. [2021-12-21 14:45:04,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:45:04,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-12-21 14:45:04,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:45:04,647 INFO L225 Difference]: With dead ends: 20654 [2021-12-21 14:45:04,648 INFO L226 Difference]: Without dead ends: 14284 [2021-12-21 14:45:04,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:45:04,655 INFO L933 BasicCegarLoop]: 1688 mSDtfsCounter, 1536 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1536 SdHoareTripleChecker+Valid, 1801 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 [2021-12-21 14:45:04,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1536 Valid, 1801 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:45:04,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14284 states. [2021-12-21 14:45:05,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14284 to 14282. [2021-12-21 14:45:05,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14282 states, 14280 states have (on average 1.4906162464985995) internal successors, (21286), 14281 states have internal predecessors, (21286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:45:05,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14282 states to 14282 states and 21286 transitions. [2021-12-21 14:45:05,432 INFO L78 Accepts]: Start accepts. Automaton has 14282 states and 21286 transitions. Word has length 93 [2021-12-21 14:45:05,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:45:05,432 INFO L470 AbstractCegarLoop]: Abstraction has 14282 states and 21286 transitions. [2021-12-21 14:45:05,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:45:05,433 INFO L276 IsEmpty]: Start isEmpty. Operand 14282 states and 21286 transitions. [2021-12-21 14:45:05,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-21 14:45:05,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:45:05,434 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:45:05,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 14:45:05,434 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:45:05,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:45:05,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1222726774, now seen corresponding path program 1 times [2021-12-21 14:45:05,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:45:05,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508574217] [2021-12-21 14:45:05,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:45:05,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:45:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:45:05,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:45:05,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:45:05,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508574217] [2021-12-21 14:45:05,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508574217] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:45:05,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:45:05,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 14:45:05,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732333050] [2021-12-21 14:45:05,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:45:05,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 14:45:05,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:45:05,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 14:45:05,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:45:05,517 INFO L87 Difference]: Start difference. First operand 14282 states and 21286 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:45:07,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:45:07,006 INFO L93 Difference]: Finished difference Result 23152 states and 34198 transitions. [2021-12-21 14:45:07,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 14:45:07,007 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 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 94 [2021-12-21 14:45:07,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:45:07,041 INFO L225 Difference]: With dead ends: 23152 [2021-12-21 14:45:07,041 INFO L226 Difference]: Without dead ends: 23150 [2021-12-21 14:45:07,047 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 [2021-12-21 14:45:07,047 INFO L933 BasicCegarLoop]: 1659 mSDtfsCounter, 801 mSDsluCounter, 9281 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 801 SdHoareTripleChecker+Valid, 10940 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 [2021-12-21 14:45:07,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [801 Valid, 10940 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:45:07,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23150 states. [2021-12-21 14:45:08,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23150 to 14666. [2021-12-21 14:45:08,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14666 states, 14664 states have (on average 1.4734042553191489) internal successors, (21606), 14665 states have internal predecessors, (21606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:45:08,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14666 states to 14666 states and 21606 transitions. [2021-12-21 14:45:08,131 INFO L78 Accepts]: Start accepts. Automaton has 14666 states and 21606 transitions. Word has length 94 [2021-12-21 14:45:08,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:45:08,132 INFO L470 AbstractCegarLoop]: Abstraction has 14666 states and 21606 transitions. [2021-12-21 14:45:08,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:45:08,132 INFO L276 IsEmpty]: Start isEmpty. Operand 14666 states and 21606 transitions. [2021-12-21 14:45:08,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-21 14:45:08,133 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:45:08,133 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:45:08,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 14:45:08,134 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:45:08,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:45:08,134 INFO L85 PathProgramCache]: Analyzing trace with hash -362720764, now seen corresponding path program 1 times [2021-12-21 14:45:08,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:45:08,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35012804] [2021-12-21 14:45:08,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:45:08,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:45:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:45:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:45:08,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:45:08,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35012804] [2021-12-21 14:45:08,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35012804] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:45:08,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:45:08,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:45:08,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165174411] [2021-12-21 14:45:08,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:45:08,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:45:08,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:45:08,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:45:08,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:45:08,163 INFO L87 Difference]: Start difference. First operand 14666 states and 21606 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:45:09,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:45:09,504 INFO L93 Difference]: Finished difference Result 27217 states and 40044 transitions. [2021-12-21 14:45:09,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:45:09,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2021-12-21 14:45:09,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:45:09,522 INFO L225 Difference]: With dead ends: 27217 [2021-12-21 14:45:09,523 INFO L226 Difference]: Without dead ends: 20430 [2021-12-21 14:45:09,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:45:09,529 INFO L933 BasicCegarLoop]: 1696 mSDtfsCounter, 1537 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 1805 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 [2021-12-21 14:45:09,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1537 Valid, 1805 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:45:09,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20430 states. [2021-12-21 14:45:10,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20430 to 20428. [2021-12-21 14:45:10,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20428 states, 20426 states have (on average 1.46205816116714) internal successors, (29864), 20427 states have internal predecessors, (29864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:45:10,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20428 states to 20428 states and 29864 transitions. [2021-12-21 14:45:10,899 INFO L78 Accepts]: Start accepts. Automaton has 20428 states and 29864 transitions. Word has length 95 [2021-12-21 14:45:10,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:45:10,900 INFO L470 AbstractCegarLoop]: Abstraction has 20428 states and 29864 transitions. [2021-12-21 14:45:10,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:45:10,900 INFO L276 IsEmpty]: Start isEmpty. Operand 20428 states and 29864 transitions. [2021-12-21 14:45:10,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-21 14:45:10,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:45:10,908 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:45:10,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 14:45:10,908 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:45:10,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:45:10,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1202553482, now seen corresponding path program 1 times [2021-12-21 14:45:10,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:45:10,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583350645] [2021-12-21 14:45:10,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:45:10,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:45:10,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:45:10,983 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 14:45:10,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:45:10,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583350645] [2021-12-21 14:45:10,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583350645] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:45:10,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:45:10,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 14:45:10,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401546716] [2021-12-21 14:45:10,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:45:10,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 14:45:10,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:45:10,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 14:45:10,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:45:10,986 INFO L87 Difference]: Start difference. First operand 20428 states and 29864 transitions. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:45:20,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:45:20,588 INFO L93 Difference]: Finished difference Result 150748 states and 218480 transitions. [2021-12-21 14:45:20,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 14:45:20,589 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 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 130 [2021-12-21 14:45:20,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:45:20,794 INFO L225 Difference]: With dead ends: 150748 [2021-12-21 14:45:20,794 INFO L226 Difference]: Without dead ends: 132634 [2021-12-21 14:45:20,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-21 14:45:20,846 INFO L933 BasicCegarLoop]: 1708 mSDtfsCounter, 10875 mSDsluCounter, 2449 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10875 SdHoareTripleChecker+Valid, 4157 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:45:20,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10875 Valid, 4157 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:45:20,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132634 states. [2021-12-21 14:45:24,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132634 to 38540. [2021-12-21 14:45:24,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38540 states, 38538 states have (on average 1.4508277544242048) internal successors, (55912), 38539 states have internal predecessors, (55912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:45:24,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38540 states to 38540 states and 55912 transitions. [2021-12-21 14:45:24,500 INFO L78 Accepts]: Start accepts. Automaton has 38540 states and 55912 transitions. Word has length 130 [2021-12-21 14:45:24,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:45:24,500 INFO L470 AbstractCegarLoop]: Abstraction has 38540 states and 55912 transitions. [2021-12-21 14:45:24,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:45:24,500 INFO L276 IsEmpty]: Start isEmpty. Operand 38540 states and 55912 transitions. [2021-12-21 14:45:24,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-21 14:45:24,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:45:24,509 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:45:24,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 14:45:24,510 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:45:24,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:45:24,510 INFO L85 PathProgramCache]: Analyzing trace with hash -566229334, now seen corresponding path program 1 times [2021-12-21 14:45:24,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:45:24,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170084841] [2021-12-21 14:45:24,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:45:24,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:45:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:45:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 14:45:24,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:45:24,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170084841] [2021-12-21 14:45:24,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170084841] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:45:24,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:45:24,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 14:45:24,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307446335] [2021-12-21 14:45:24,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:45:24,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 14:45:24,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:45:24,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 14:45:24,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:45:24,847 INFO L87 Difference]: Start difference. First operand 38540 states and 55912 transitions. Second operand has 9 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:45:37,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:45:37,402 INFO L93 Difference]: Finished difference Result 168860 states and 244528 transitions. [2021-12-21 14:45:37,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 14:45:37,402 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 states have internal predecessors, (118), 0 states have call successors, (0), 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 130 [2021-12-21 14:45:37,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:45:37,629 INFO L225 Difference]: With dead ends: 168860 [2021-12-21 14:45:37,629 INFO L226 Difference]: Without dead ends: 150746 [2021-12-21 14:45:37,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-21 14:45:37,664 INFO L933 BasicCegarLoop]: 1710 mSDtfsCounter, 10612 mSDsluCounter, 2504 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10612 SdHoareTripleChecker+Valid, 4214 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:45:37,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10612 Valid, 4214 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:45:37,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150746 states. [2021-12-21 14:45:44,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150746 to 65740. [2021-12-21 14:45:44,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65740 states, 65738 states have (on average 1.4424533755210076) internal successors, (94824), 65739 states have internal predecessors, (94824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:45:44,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65740 states to 65740 states and 94824 transitions. [2021-12-21 14:45:44,405 INFO L78 Accepts]: Start accepts. Automaton has 65740 states and 94824 transitions. Word has length 130 [2021-12-21 14:45:44,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:45:44,405 INFO L470 AbstractCegarLoop]: Abstraction has 65740 states and 94824 transitions. [2021-12-21 14:45:44,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:45:44,405 INFO L276 IsEmpty]: Start isEmpty. Operand 65740 states and 94824 transitions. [2021-12-21 14:45:44,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-21 14:45:44,451 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:45:44,451 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:45:44,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 14:45:44,452 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:45:44,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:45:44,452 INFO L85 PathProgramCache]: Analyzing trace with hash 565410506, now seen corresponding path program 1 times [2021-12-21 14:45:44,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:45:44,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568813196] [2021-12-21 14:45:44,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:45:44,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:45:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:45:44,554 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-21 14:45:44,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:45:44,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568813196] [2021-12-21 14:45:44,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568813196] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:45:44,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:45:44,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 14:45:44,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017174898] [2021-12-21 14:45:44,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:45:44,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 14:45:44,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:45:44,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 14:45:44,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:45:44,557 INFO L87 Difference]: Start difference. First operand 65740 states and 94824 transitions. Second operand has 9 states, 9 states have (on average 13.222222222222221) internal successors, (119), 9 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)