./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.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 d0cee5b1964cd71f7406ad577c9568bfea84778de80728dfc08113baa4a027fc --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 11:49:25,068 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 11:49:25,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 11:49:25,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 11:49:25,115 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 11:49:25,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 11:49:25,121 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 11:49:25,125 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 11:49:25,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 11:49:25,132 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 11:49:25,132 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 11:49:25,133 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 11:49:25,134 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 11:49:25,136 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 11:49:25,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 11:49:25,138 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 11:49:25,143 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 11:49:25,144 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 11:49:25,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 11:49:25,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 11:49:25,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 11:49:25,153 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 11:49:25,154 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 11:49:25,155 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 11:49:25,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 11:49:25,158 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 11:49:25,159 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 11:49:25,160 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 11:49:25,161 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 11:49:25,161 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 11:49:25,162 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 11:49:25,162 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 11:49:25,164 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 11:49:25,165 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 11:49:25,166 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 11:49:25,166 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 11:49:25,167 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 11:49:25,167 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 11:49:25,167 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 11:49:25,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 11:49:25,168 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 11:49:25,169 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 11:49:25,198 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 11:49:25,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 11:49:25,199 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 11:49:25,200 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 11:49:25,200 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 11:49:25,201 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 11:49:25,201 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 11:49:25,201 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 11:49:25,201 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 11:49:25,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 11:49:25,202 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 11:49:25,203 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 11:49:25,203 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 11:49:25,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 11:49:25,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 11:49:25,203 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 11:49:25,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 11:49:25,204 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 11:49:25,204 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 11:49:25,204 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 11:49:25,204 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 11:49:25,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 11:49:25,205 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 11:49:25,205 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 11:49:25,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:49:25,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 11:49:25,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 11:49:25,206 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 11:49:25,206 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 11:49:25,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 11:49:25,206 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 11:49:25,206 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 11:49:25,207 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 11:49:25,207 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 11:49:25,207 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d0cee5b1964cd71f7406ad577c9568bfea84778de80728dfc08113baa4a027fc [2021-12-22 11:49:25,393 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 11:49:25,410 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 11:49:25,412 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 11:49:25,413 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 11:49:25,413 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 11:49:25,414 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c [2021-12-22 11:49:25,471 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66bc3fce6/327d8dc2d113484588169491a4249377/FLAGdaf1d5a45 [2021-12-22 11:49:25,834 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 11:49:25,835 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c [2021-12-22 11:49:25,842 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66bc3fce6/327d8dc2d113484588169491a4249377/FLAGdaf1d5a45 [2021-12-22 11:49:25,858 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66bc3fce6/327d8dc2d113484588169491a4249377 [2021-12-22 11:49:25,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 11:49:25,861 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 11:49:25,865 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 11:49:25,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 11:49:25,869 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 11:49:25,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:49:25" (1/1) ... [2021-12-22 11:49:25,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52d11852 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:25, skipping insertion in model container [2021-12-22 11:49:25,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:49:25" (1/1) ... [2021-12-22 11:49:25,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 11:49:25,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 11:49:26,104 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/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c[6940,6953] [2021-12-22 11:49:26,107 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:49:26,114 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 11:49:26,152 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/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c[6940,6953] [2021-12-22 11:49:26,156 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:49:26,168 INFO L208 MainTranslator]: Completed translation [2021-12-22 11:49:26,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:26 WrapperNode [2021-12-22 11:49:26,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 11:49:26,169 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 11:49:26,169 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 11:49:26,170 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 11:49:26,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:26" (1/1) ... [2021-12-22 11:49:26,183 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:26" (1/1) ... [2021-12-22 11:49:26,204 INFO L137 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 253 [2021-12-22 11:49:26,204 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 11:49:26,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 11:49:26,205 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 11:49:26,205 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 11:49:26,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:26" (1/1) ... [2021-12-22 11:49:26,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:26" (1/1) ... [2021-12-22 11:49:26,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:26" (1/1) ... [2021-12-22 11:49:26,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:26" (1/1) ... [2021-12-22 11:49:26,220 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:26" (1/1) ... [2021-12-22 11:49:26,224 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:26" (1/1) ... [2021-12-22 11:49:26,225 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:26" (1/1) ... [2021-12-22 11:49:26,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 11:49:26,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 11:49:26,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 11:49:26,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 11:49:26,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:26" (1/1) ... [2021-12-22 11:49:26,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:49:26,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:49:26,257 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) [2021-12-22 11:49:26,282 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 [2021-12-22 11:49:26,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 11:49:26,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 11:49:26,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 11:49:26,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 11:49:26,368 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 11:49:26,369 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 11:49:26,667 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 11:49:26,673 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 11:49:26,674 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 11:49:26,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:49:26 BoogieIcfgContainer [2021-12-22 11:49:26,682 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 11:49:26,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 11:49:26,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 11:49:26,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 11:49:26,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:49:25" (1/3) ... [2021-12-22 11:49:26,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c770e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:49:26, skipping insertion in model container [2021-12-22 11:49:26,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:26" (2/3) ... [2021-12-22 11:49:26,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c770e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:49:26, skipping insertion in model container [2021-12-22 11:49:26,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:49:26" (3/3) ... [2021-12-22 11:49:26,689 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c [2021-12-22 11:49:26,694 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 11:49:26,698 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 11:49:26,734 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 11:49:26,740 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 [2021-12-22 11:49:26,740 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 11:49:26,752 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 79 states have (on average 1.6708860759493671) internal successors, (132), 80 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:26,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 11:49:26,758 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:26,759 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:26,759 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:26,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:26,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1546658209, now seen corresponding path program 1 times [2021-12-22 11:49:26,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:26,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377720669] [2021-12-22 11:49:26,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:26,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:26,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:27,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:27,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:27,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377720669] [2021-12-22 11:49:27,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377720669] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:27,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:27,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:49:27,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759990612] [2021-12-22 11:49:27,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:27,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:49:27,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:27,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:49:27,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:49:27,076 INFO L87 Difference]: Start difference. First operand has 81 states, 79 states have (on average 1.6708860759493671) internal successors, (132), 80 states have internal predecessors, (132), 0 states have call successors, (0), 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 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:27,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:27,172 INFO L93 Difference]: Finished difference Result 139 states and 225 transitions. [2021-12-22 11:49:27,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:49:27,175 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-22 11:49:27,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:27,182 INFO L225 Difference]: With dead ends: 139 [2021-12-22 11:49:27,182 INFO L226 Difference]: Without dead ends: 77 [2021-12-22 11:49:27,188 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 [2021-12-22 11:49:27,193 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 3 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:27,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 472 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:27,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-22 11:49:27,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-12-22 11:49:27,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.4210526315789473) internal successors, (108), 76 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:27,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 108 transitions. [2021-12-22 11:49:27,223 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 108 transitions. Word has length 26 [2021-12-22 11:49:27,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:27,223 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 108 transitions. [2021-12-22 11:49:27,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:27,224 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 108 transitions. [2021-12-22 11:49:27,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-22 11:49:27,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:27,225 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] [2021-12-22 11:49:27,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 11:49:27,226 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:27,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:27,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1146437097, now seen corresponding path program 1 times [2021-12-22 11:49:27,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:27,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950328307] [2021-12-22 11:49:27,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:27,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:27,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:27,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:27,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950328307] [2021-12-22 11:49:27,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950328307] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:27,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:27,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:49:27,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598325422] [2021-12-22 11:49:27,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:27,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:49:27,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:27,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:49:27,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:27,352 INFO L87 Difference]: Start difference. First operand 77 states and 108 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 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) [2021-12-22 11:49:27,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:27,380 INFO L93 Difference]: Finished difference Result 173 states and 258 transitions. [2021-12-22 11:49:27,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:49:27,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 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 [2021-12-22 11:49:27,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:27,385 INFO L225 Difference]: With dead ends: 173 [2021-12-22 11:49:27,385 INFO L226 Difference]: Without dead ends: 119 [2021-12-22 11:49:27,386 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 [2021-12-22 11:49:27,387 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 68 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 223 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 [2021-12-22 11:49:27,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 223 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:27,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-22 11:49:27,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2021-12-22 11:49:27,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.4741379310344827) internal successors, (171), 116 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:27,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 171 transitions. [2021-12-22 11:49:27,400 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 171 transitions. Word has length 42 [2021-12-22 11:49:27,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:27,400 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 171 transitions. [2021-12-22 11:49:27,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 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) [2021-12-22 11:49:27,401 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 171 transitions. [2021-12-22 11:49:27,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-22 11:49:27,401 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:27,402 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:27,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 11:49:27,402 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:27,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:27,402 INFO L85 PathProgramCache]: Analyzing trace with hash 983172312, now seen corresponding path program 1 times [2021-12-22 11:49:27,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:27,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45470639] [2021-12-22 11:49:27,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:27,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:27,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:27,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:27,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45470639] [2021-12-22 11:49:27,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45470639] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:27,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:27,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:49:27,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533442396] [2021-12-22 11:49:27,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:27,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:49:27,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:27,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:49:27,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:27,458 INFO L87 Difference]: Start difference. First operand 117 states and 171 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:27,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:27,477 INFO L93 Difference]: Finished difference Result 281 states and 427 transitions. [2021-12-22 11:49:27,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:49:27,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-22 11:49:27,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:27,479 INFO L225 Difference]: With dead ends: 281 [2021-12-22 11:49:27,479 INFO L226 Difference]: Without dead ends: 187 [2021-12-22 11:49:27,480 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 [2021-12-22 11:49:27,481 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 63 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 214 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 [2021-12-22 11:49:27,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 214 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:27,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-22 11:49:27,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2021-12-22 11:49:27,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.5) internal successors, (276), 184 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:27,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 276 transitions. [2021-12-22 11:49:27,503 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 276 transitions. Word has length 43 [2021-12-22 11:49:27,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:27,503 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 276 transitions. [2021-12-22 11:49:27,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:27,504 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 276 transitions. [2021-12-22 11:49:27,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 11:49:27,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:27,507 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:27,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 11:49:27,507 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:27,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:27,508 INFO L85 PathProgramCache]: Analyzing trace with hash -14404519, now seen corresponding path program 1 times [2021-12-22 11:49:27,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:27,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702731348] [2021-12-22 11:49:27,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:27,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:27,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:27,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:27,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702731348] [2021-12-22 11:49:27,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702731348] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:27,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:27,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:49:27,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404969188] [2021-12-22 11:49:27,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:27,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:49:27,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:27,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:49:27,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:49:27,589 INFO L87 Difference]: Start difference. First operand 185 states and 276 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:27,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:27,712 INFO L93 Difference]: Finished difference Result 833 states and 1288 transitions. [2021-12-22 11:49:27,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:49:27,713 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-22 11:49:27,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:27,719 INFO L225 Difference]: With dead ends: 833 [2021-12-22 11:49:27,719 INFO L226 Difference]: Without dead ends: 671 [2021-12-22 11:49:27,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:49:27,731 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 427 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:27,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 588 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:27,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-12-22 11:49:27,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 345. [2021-12-22 11:49:27,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.5116279069767442) internal successors, (520), 344 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:27,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 520 transitions. [2021-12-22 11:49:27,784 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 520 transitions. Word has length 44 [2021-12-22 11:49:27,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:27,785 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 520 transitions. [2021-12-22 11:49:27,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:27,786 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 520 transitions. [2021-12-22 11:49:27,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 11:49:27,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:27,792 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:27,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 11:49:27,793 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:27,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:27,799 INFO L85 PathProgramCache]: Analyzing trace with hash -829863502, now seen corresponding path program 1 times [2021-12-22 11:49:27,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:27,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577413924] [2021-12-22 11:49:27,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:27,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:27,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:27,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:27,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577413924] [2021-12-22 11:49:27,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577413924] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:27,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:27,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:49:27,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592309235] [2021-12-22 11:49:27,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:27,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:49:27,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:27,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:49:27,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:49:27,924 INFO L87 Difference]: Start difference. First operand 345 states and 520 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:28,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:28,024 INFO L93 Difference]: Finished difference Result 1215 states and 1847 transitions. [2021-12-22 11:49:28,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:49:28,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-22 11:49:28,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:28,028 INFO L225 Difference]: With dead ends: 1215 [2021-12-22 11:49:28,029 INFO L226 Difference]: Without dead ends: 893 [2021-12-22 11:49:28,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:49:28,034 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 248 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:28,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 364 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:28,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-12-22 11:49:28,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 889. [2021-12-22 11:49:28,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 1.509009009009009) internal successors, (1340), 888 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:28,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1340 transitions. [2021-12-22 11:49:28,102 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1340 transitions. Word has length 45 [2021-12-22 11:49:28,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:28,103 INFO L470 AbstractCegarLoop]: Abstraction has 889 states and 1340 transitions. [2021-12-22 11:49:28,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:28,103 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1340 transitions. [2021-12-22 11:49:28,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-22 11:49:28,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:28,104 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] [2021-12-22 11:49:28,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 11:49:28,105 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:28,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:28,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1485202410, now seen corresponding path program 1 times [2021-12-22 11:49:28,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:28,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450447649] [2021-12-22 11:49:28,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:28,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:28,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:28,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:28,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450447649] [2021-12-22 11:49:28,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450447649] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:28,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:28,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:49:28,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696677865] [2021-12-22 11:49:28,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:28,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:49:28,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:28,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:49:28,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:28,149 INFO L87 Difference]: Start difference. First operand 889 states and 1340 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:28,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:28,233 INFO L93 Difference]: Finished difference Result 2309 states and 3462 transitions. [2021-12-22 11:49:28,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:49:28,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2021-12-22 11:49:28,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:28,239 INFO L225 Difference]: With dead ends: 2309 [2021-12-22 11:49:28,239 INFO L226 Difference]: Without dead ends: 1443 [2021-12-22 11:49:28,241 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 [2021-12-22 11:49:28,242 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 70 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 242 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 [2021-12-22 11:49:28,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 242 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:28,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-12-22 11:49:28,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1441. [2021-12-22 11:49:28,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1440 states have (on average 1.4722222222222223) internal successors, (2120), 1440 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:28,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 2120 transitions. [2021-12-22 11:49:28,352 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 2120 transitions. Word has length 46 [2021-12-22 11:49:28,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:28,352 INFO L470 AbstractCegarLoop]: Abstraction has 1441 states and 2120 transitions. [2021-12-22 11:49:28,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:28,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 2120 transitions. [2021-12-22 11:49:28,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-22 11:49:28,353 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:28,354 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] [2021-12-22 11:49:28,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 11:49:28,354 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:28,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:28,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1374629896, now seen corresponding path program 1 times [2021-12-22 11:49:28,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:28,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153185823] [2021-12-22 11:49:28,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:28,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:28,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:28,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:28,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153185823] [2021-12-22 11:49:28,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153185823] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:28,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:28,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:49:28,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78318499] [2021-12-22 11:49:28,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:28,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:49:28,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:28,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:49:28,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:49:28,415 INFO L87 Difference]: Start difference. First operand 1441 states and 2120 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:28,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:28,630 INFO L93 Difference]: Finished difference Result 3051 states and 4409 transitions. [2021-12-22 11:49:28,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 11:49:28,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2021-12-22 11:49:28,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:28,643 INFO L225 Difference]: With dead ends: 3051 [2021-12-22 11:49:28,643 INFO L226 Difference]: Without dead ends: 3049 [2021-12-22 11:49:28,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:49:28,646 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 234 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:28,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 467 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:28,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-12-22 11:49:28,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 1585. [2021-12-22 11:49:28,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 1.4292929292929293) internal successors, (2264), 1584 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:28,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 2264 transitions. [2021-12-22 11:49:28,778 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 2264 transitions. Word has length 46 [2021-12-22 11:49:28,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:28,779 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 2264 transitions. [2021-12-22 11:49:28,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:28,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 2264 transitions. [2021-12-22 11:49:28,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-22 11:49:28,780 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:28,780 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] [2021-12-22 11:49:28,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 11:49:28,780 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:28,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:28,781 INFO L85 PathProgramCache]: Analyzing trace with hash -283567685, now seen corresponding path program 1 times [2021-12-22 11:49:28,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:28,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113749786] [2021-12-22 11:49:28,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:28,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:28,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:28,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:28,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113749786] [2021-12-22 11:49:28,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113749786] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:28,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:28,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:49:28,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269045369] [2021-12-22 11:49:28,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:28,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:49:28,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:28,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:49:28,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:28,847 INFO L87 Difference]: Start difference. First operand 1585 states and 2264 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:29,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:29,001 INFO L93 Difference]: Finished difference Result 3787 states and 5424 transitions. [2021-12-22 11:49:29,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:49:29,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2021-12-22 11:49:29,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:29,011 INFO L225 Difference]: With dead ends: 3787 [2021-12-22 11:49:29,011 INFO L226 Difference]: Without dead ends: 2225 [2021-12-22 11:49:29,013 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 [2021-12-22 11:49:29,013 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 53 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:29,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 187 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:29,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-12-22 11:49:29,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2203. [2021-12-22 11:49:29,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2202 states have (on average 1.4178019981834695) internal successors, (3122), 2202 states have internal predecessors, (3122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:29,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 3122 transitions. [2021-12-22 11:49:29,184 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 3122 transitions. Word has length 47 [2021-12-22 11:49:29,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:29,186 INFO L470 AbstractCegarLoop]: Abstraction has 2203 states and 3122 transitions. [2021-12-22 11:49:29,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:29,187 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 3122 transitions. [2021-12-22 11:49:29,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 11:49:29,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:29,189 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:29,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 11:49:29,190 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:29,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:29,190 INFO L85 PathProgramCache]: Analyzing trace with hash 613343109, now seen corresponding path program 1 times [2021-12-22 11:49:29,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:29,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783779659] [2021-12-22 11:49:29,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:29,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:29,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:29,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:29,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783779659] [2021-12-22 11:49:29,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783779659] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:49:29,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171685925] [2021-12-22 11:49:29,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:29,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:49:29,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:49:29,375 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 11:49:29,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 11:49:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:29,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 11:49:29,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:49:29,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 11:49:29,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:49:30,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 11:49:30,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171685925] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:49:30,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:49:30,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2021-12-22 11:49:30,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359773640] [2021-12-22 11:49:30,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:49:30,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 11:49:30,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:30,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 11:49:30,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-22 11:49:30,012 INFO L87 Difference]: Start difference. First operand 2203 states and 3122 transitions. Second operand has 14 states, 14 states have (on average 13.571428571428571) internal successors, (190), 14 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:34,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:34,419 INFO L93 Difference]: Finished difference Result 23583 states and 33190 transitions. [2021-12-22 11:49:34,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-22 11:49:34,420 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.571428571428571) internal successors, (190), 14 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-22 11:49:34,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:34,481 INFO L225 Difference]: With dead ends: 23583 [2021-12-22 11:49:34,481 INFO L226 Difference]: Without dead ends: 21405 [2021-12-22 11:49:34,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1976 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1145, Invalid=4555, Unknown=0, NotChecked=0, Total=5700 [2021-12-22 11:49:34,491 INFO L933 BasicCegarLoop]: 395 mSDtfsCounter, 3086 mSDsluCounter, 2241 mSDsCounter, 0 mSdLazyCounter, 2041 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3086 SdHoareTripleChecker+Valid, 2636 SdHoareTripleChecker+Invalid, 2170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:34,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3086 Valid, 2636 Invalid, 2170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2041 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-22 11:49:34,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21405 states. [2021-12-22 11:49:35,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21405 to 11491. [2021-12-22 11:49:35,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11491 states, 11490 states have (on average 1.3942558746736293) internal successors, (16020), 11490 states have internal predecessors, (16020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:35,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11491 states to 11491 states and 16020 transitions. [2021-12-22 11:49:35,467 INFO L78 Accepts]: Start accepts. Automaton has 11491 states and 16020 transitions. Word has length 68 [2021-12-22 11:49:35,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:35,468 INFO L470 AbstractCegarLoop]: Abstraction has 11491 states and 16020 transitions. [2021-12-22 11:49:35,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.571428571428571) internal successors, (190), 14 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:35,468 INFO L276 IsEmpty]: Start isEmpty. Operand 11491 states and 16020 transitions. [2021-12-22 11:49:35,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 11:49:35,471 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:35,471 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:35,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 11:49:35,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:49:35,691 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:35,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:35,692 INFO L85 PathProgramCache]: Analyzing trace with hash 717525894, now seen corresponding path program 1 times [2021-12-22 11:49:35,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:35,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9867620] [2021-12-22 11:49:35,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:35,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:35,740 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:35,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:35,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9867620] [2021-12-22 11:49:35,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9867620] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:35,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:35,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:49:35,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507758601] [2021-12-22 11:49:35,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:35,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:49:35,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:35,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:49:35,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:35,743 INFO L87 Difference]: Start difference. First operand 11491 states and 16020 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:36,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:36,596 INFO L93 Difference]: Finished difference Result 25344 states and 35256 transitions. [2021-12-22 11:49:36,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:49:36,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-22 11:49:36,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:36,629 INFO L225 Difference]: With dead ends: 25344 [2021-12-22 11:49:36,630 INFO L226 Difference]: Without dead ends: 17126 [2021-12-22 11:49:36,645 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 [2021-12-22 11:49:36,646 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 55 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:36,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 247 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:36,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17126 states. [2021-12-22 11:49:37,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17126 to 17124. [2021-12-22 11:49:37,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17124 states, 17123 states have (on average 1.3662325527068855) internal successors, (23394), 17123 states have internal predecessors, (23394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:37,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17124 states to 17124 states and 23394 transitions. [2021-12-22 11:49:37,585 INFO L78 Accepts]: Start accepts. Automaton has 17124 states and 23394 transitions. Word has length 68 [2021-12-22 11:49:37,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:37,585 INFO L470 AbstractCegarLoop]: Abstraction has 17124 states and 23394 transitions. [2021-12-22 11:49:37,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:37,586 INFO L276 IsEmpty]: Start isEmpty. Operand 17124 states and 23394 transitions. [2021-12-22 11:49:37,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 11:49:37,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:37,590 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 11:49:37,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 11:49:37,590 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:37,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:37,591 INFO L85 PathProgramCache]: Analyzing trace with hash -55467066, now seen corresponding path program 1 times [2021-12-22 11:49:37,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:37,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664540632] [2021-12-22 11:49:37,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:37,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:37,617 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:37,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:37,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664540632] [2021-12-22 11:49:37,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664540632] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:37,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:37,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:49:37,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002292094] [2021-12-22 11:49:37,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:37,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:49:37,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:37,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:49:37,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:37,619 INFO L87 Difference]: Start difference. First operand 17124 states and 23394 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:38,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:38,822 INFO L93 Difference]: Finished difference Result 34411 states and 46718 transitions. [2021-12-22 11:49:38,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:49:38,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-22 11:49:38,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:38,869 INFO L225 Difference]: With dead ends: 34411 [2021-12-22 11:49:38,870 INFO L226 Difference]: Without dead ends: 23489 [2021-12-22 11:49:38,890 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 [2021-12-22 11:49:38,891 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 52 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:38,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 219 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:38,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23489 states. [2021-12-22 11:49:40,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23489 to 23487. [2021-12-22 11:49:40,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23487 states, 23486 states have (on average 1.3409690879672997) internal successors, (31494), 23486 states have internal predecessors, (31494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:40,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23487 states to 23487 states and 31494 transitions. [2021-12-22 11:49:40,329 INFO L78 Accepts]: Start accepts. Automaton has 23487 states and 31494 transitions. Word has length 68 [2021-12-22 11:49:40,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:40,329 INFO L470 AbstractCegarLoop]: Abstraction has 23487 states and 31494 transitions. [2021-12-22 11:49:40,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:40,330 INFO L276 IsEmpty]: Start isEmpty. Operand 23487 states and 31494 transitions. [2021-12-22 11:49:40,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 11:49:40,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:40,336 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 11:49:40,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 11:49:40,336 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:40,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:40,337 INFO L85 PathProgramCache]: Analyzing trace with hash 371878998, now seen corresponding path program 1 times [2021-12-22 11:49:40,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:40,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895944467] [2021-12-22 11:49:40,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:40,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:40,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:40,385 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 11:49:40,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:40,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895944467] [2021-12-22 11:49:40,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895944467] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:40,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:40,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:49:40,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200651170] [2021-12-22 11:49:40,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:40,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:49:40,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:40,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:49:40,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:49:40,388 INFO L87 Difference]: Start difference. First operand 23487 states and 31494 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:42,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:42,019 INFO L93 Difference]: Finished difference Result 41713 states and 56042 transitions. [2021-12-22 11:49:42,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:49:42,019 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-22 11:49:42,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:42,072 INFO L225 Difference]: With dead ends: 41713 [2021-12-22 11:49:42,072 INFO L226 Difference]: Without dead ends: 34619 [2021-12-22 11:49:42,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:49:42,092 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 299 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:42,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 459 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:42,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34619 states. [2021-12-22 11:49:43,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34619 to 30111. [2021-12-22 11:49:43,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30111 states, 30110 states have (on average 1.3350381932912654) internal successors, (40198), 30110 states have internal predecessors, (40198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:43,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30111 states to 30111 states and 40198 transitions. [2021-12-22 11:49:43,929 INFO L78 Accepts]: Start accepts. Automaton has 30111 states and 40198 transitions. Word has length 68 [2021-12-22 11:49:43,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:43,929 INFO L470 AbstractCegarLoop]: Abstraction has 30111 states and 40198 transitions. [2021-12-22 11:49:43,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:43,930 INFO L276 IsEmpty]: Start isEmpty. Operand 30111 states and 40198 transitions. [2021-12-22 11:49:43,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 11:49:43,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:43,937 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 11:49:43,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 11:49:43,938 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:43,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:43,938 INFO L85 PathProgramCache]: Analyzing trace with hash -846517202, now seen corresponding path program 1 times [2021-12-22 11:49:43,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:43,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590659829] [2021-12-22 11:49:43,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:43,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:43,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:43,991 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 11:49:43,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:43,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590659829] [2021-12-22 11:49:43,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590659829] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:43,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:43,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:49:43,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174476227] [2021-12-22 11:49:43,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:43,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:49:43,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:43,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:49:43,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:49:43,994 INFO L87 Difference]: Start difference. First operand 30111 states and 40198 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:45,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:45,749 INFO L93 Difference]: Finished difference Result 51615 states and 69310 transitions. [2021-12-22 11:49:45,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:49:45,750 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-22 11:49:45,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:45,809 INFO L225 Difference]: With dead ends: 51615 [2021-12-22 11:49:45,809 INFO L226 Difference]: Without dead ends: 41009 [2021-12-22 11:49:45,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:49:45,838 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 296 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:45,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 499 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:45,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41009 states. [2021-12-22 11:49:47,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41009 to 37991. [2021-12-22 11:49:47,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37991 states, 37990 states have (on average 1.3299289286654383) internal successors, (50524), 37990 states have internal predecessors, (50524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:48,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37991 states to 37991 states and 50524 transitions. [2021-12-22 11:49:48,009 INFO L78 Accepts]: Start accepts. Automaton has 37991 states and 50524 transitions. Word has length 68 [2021-12-22 11:49:48,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:48,010 INFO L470 AbstractCegarLoop]: Abstraction has 37991 states and 50524 transitions. [2021-12-22 11:49:48,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:48,010 INFO L276 IsEmpty]: Start isEmpty. Operand 37991 states and 50524 transitions. [2021-12-22 11:49:48,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 11:49:48,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:48,016 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:48,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 11:49:48,016 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:48,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:48,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1063519862, now seen corresponding path program 1 times [2021-12-22 11:49:48,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:48,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530841823] [2021-12-22 11:49:48,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:48,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:48,073 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 11:49:48,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:48,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530841823] [2021-12-22 11:49:48,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530841823] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:48,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:48,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:49:48,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261034412] [2021-12-22 11:49:48,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:48,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:49:48,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:48,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:49:48,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:49:48,077 INFO L87 Difference]: Start difference. First operand 37991 states and 50524 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:50,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:50,420 INFO L93 Difference]: Finished difference Result 50811 states and 67742 transitions. [2021-12-22 11:49:50,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:49:50,421 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-12-22 11:49:50,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:50,474 INFO L225 Difference]: With dead ends: 50811 [2021-12-22 11:49:50,475 INFO L226 Difference]: Without dead ends: 45175 [2021-12-22 11:49:50,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:49:50,497 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 285 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:50,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 471 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:50,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45175 states. [2021-12-22 11:49:52,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45175 to 42157. [2021-12-22 11:49:52,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42157 states, 42156 states have (on average 1.327355536578423) internal successors, (55956), 42156 states have internal predecessors, (55956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:52,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42157 states to 42157 states and 55956 transitions. [2021-12-22 11:49:52,960 INFO L78 Accepts]: Start accepts. Automaton has 42157 states and 55956 transitions. Word has length 69 [2021-12-22 11:49:52,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:52,960 INFO L470 AbstractCegarLoop]: Abstraction has 42157 states and 55956 transitions. [2021-12-22 11:49:52,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:52,961 INFO L276 IsEmpty]: Start isEmpty. Operand 42157 states and 55956 transitions. [2021-12-22 11:49:52,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-22 11:49:52,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:52,968 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 11:49:52,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 11:49:52,968 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:52,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:52,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1024312551, now seen corresponding path program 1 times [2021-12-22 11:49:52,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:52,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198029414] [2021-12-22 11:49:52,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:52,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:53,000 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:53,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:53,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198029414] [2021-12-22 11:49:53,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198029414] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:53,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:53,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:49:53,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659484061] [2021-12-22 11:49:53,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:53,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:49:53,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:53,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:49:53,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:53,005 INFO L87 Difference]: Start difference. First operand 42157 states and 55956 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:55,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:55,772 INFO L93 Difference]: Finished difference Result 77153 states and 101929 transitions. [2021-12-22 11:49:55,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:49:55,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-12-22 11:49:55,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:55,827 INFO L225 Difference]: With dead ends: 77153 [2021-12-22 11:49:55,828 INFO L226 Difference]: Without dead ends: 43070 [2021-12-22 11:49:55,853 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 [2021-12-22 11:49:55,854 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 51 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:55,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 245 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:55,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43070 states. [2021-12-22 11:49:58,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43070 to 42234. [2021-12-22 11:49:58,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42234 states, 42233 states have (on average 1.3113678876707788) internal successors, (55383), 42233 states have internal predecessors, (55383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:58,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42234 states to 42234 states and 55383 transitions. [2021-12-22 11:49:58,224 INFO L78 Accepts]: Start accepts. Automaton has 42234 states and 55383 transitions. Word has length 71 [2021-12-22 11:49:58,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:58,225 INFO L470 AbstractCegarLoop]: Abstraction has 42234 states and 55383 transitions. [2021-12-22 11:49:58,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:58,225 INFO L276 IsEmpty]: Start isEmpty. Operand 42234 states and 55383 transitions. [2021-12-22 11:49:58,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-22 11:49:58,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:58,232 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:58,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 11:49:58,232 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:58,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:58,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1831633139, now seen corresponding path program 1 times [2021-12-22 11:49:58,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:58,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118896214] [2021-12-22 11:49:58,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:58,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:58,260 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:58,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:58,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118896214] [2021-12-22 11:49:58,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118896214] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:58,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:58,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:49:58,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577073050] [2021-12-22 11:49:58,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:58,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:49:58,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:58,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:49:58,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:58,263 INFO L87 Difference]: Start difference. First operand 42234 states and 55383 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:00,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:50:00,471 INFO L93 Difference]: Finished difference Result 66730 states and 87286 transitions. [2021-12-22 11:50:00,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:50:00,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-12-22 11:50:00,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:50:00,523 INFO L225 Difference]: With dead ends: 66730 [2021-12-22 11:50:00,523 INFO L226 Difference]: Without dead ends: 42252 [2021-12-22 11:50:00,540 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 [2021-12-22 11:50:00,541 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 50 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:50:00,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 228 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:50:00,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42252 states. [2021-12-22 11:50:02,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42252 to 35602. [2021-12-22 11:50:02,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35602 states, 35601 states have (on average 1.299485969495239) internal successors, (46263), 35601 states have internal predecessors, (46263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:02,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35602 states to 35602 states and 46263 transitions. [2021-12-22 11:50:02,752 INFO L78 Accepts]: Start accepts. Automaton has 35602 states and 46263 transitions. Word has length 72 [2021-12-22 11:50:02,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:50:02,753 INFO L470 AbstractCegarLoop]: Abstraction has 35602 states and 46263 transitions. [2021-12-22 11:50:02,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:02,753 INFO L276 IsEmpty]: Start isEmpty. Operand 35602 states and 46263 transitions. [2021-12-22 11:50:02,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-22 11:50:02,758 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:50:02,758 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:50:02,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 11:50:02,758 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:50:02,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:50:02,759 INFO L85 PathProgramCache]: Analyzing trace with hash -689106483, now seen corresponding path program 1 times [2021-12-22 11:50:02,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:50:02,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207054008] [2021-12-22 11:50:02,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:50:02,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:50:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:50:02,801 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 11:50:02,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:50:02,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207054008] [2021-12-22 11:50:02,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207054008] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:50:02,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:50:02,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:50:02,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028057507] [2021-12-22 11:50:02,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:50:02,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:50:02,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:50:02,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:50:02,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:50:02,803 INFO L87 Difference]: Start difference. First operand 35602 states and 46263 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:06,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:50:06,116 INFO L93 Difference]: Finished difference Result 88760 states and 115042 transitions. [2021-12-22 11:50:06,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 11:50:06,117 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-12-22 11:50:06,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:50:06,189 INFO L225 Difference]: With dead ends: 88760 [2021-12-22 11:50:06,190 INFO L226 Difference]: Without dead ends: 53209 [2021-12-22 11:50:06,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-22 11:50:06,219 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 548 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:50:06,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 162 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:50:06,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53209 states.