./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.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 1aca40c6fb295c9a2e56226d72fd8b40da8517a7cbcabf878259c9e76e6a2f97 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 20:53:10,062 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 20:53:10,064 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 20:53:10,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 20:53:10,099 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 20:53:10,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 20:53:10,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 20:53:10,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 20:53:10,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 20:53:10,110 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 20:53:10,110 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 20:53:10,112 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 20:53:10,112 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 20:53:10,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 20:53:10,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 20:53:10,120 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 20:53:10,121 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 20:53:10,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 20:53:10,124 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 20:53:10,129 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 20:53:10,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 20:53:10,131 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 20:53:10,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 20:53:10,142 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 20:53:10,148 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 20:53:10,149 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 20:53:10,149 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 20:53:10,150 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 20:53:10,151 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 20:53:10,151 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 20:53:10,152 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 20:53:10,152 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 20:53:10,154 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 20:53:10,155 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 20:53:10,156 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 20:53:10,156 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 20:53:10,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 20:53:10,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 20:53:10,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 20:53:10,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 20:53:10,159 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 20:53:10,161 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 20:53:10,197 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 20:53:10,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 20:53:10,199 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 20:53:10,199 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 20:53:10,200 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 20:53:10,200 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 20:53:10,201 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 20:53:10,201 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 20:53:10,201 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 20:53:10,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 20:53:10,202 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 20:53:10,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 20:53:10,203 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 20:53:10,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 20:53:10,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 20:53:10,203 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 20:53:10,203 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 20:53:10,203 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 20:53:10,204 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 20:53:10,204 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 20:53:10,204 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 20:53:10,204 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 20:53:10,204 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 20:53:10,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 20:53:10,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 20:53:10,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 20:53:10,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 20:53:10,206 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 20:53:10,206 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 20:53:10,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 20:53:10,207 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 20:53:10,207 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 20:53:10,207 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 20:53:10,207 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 20:53:10,208 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1aca40c6fb295c9a2e56226d72fd8b40da8517a7cbcabf878259c9e76e6a2f97 [2021-12-17 20:53:10,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 20:53:10,460 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 20:53:10,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 20:53:10,463 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 20:53:10,467 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 20:53:10,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c [2021-12-17 20:53:10,531 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ffa17620/1b942507b35a408e9baa4bc0b96bafc2/FLAG883d45aff [2021-12-17 20:53:11,195 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 20:53:11,196 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c [2021-12-17 20:53:11,225 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ffa17620/1b942507b35a408e9baa4bc0b96bafc2/FLAG883d45aff [2021-12-17 20:53:11,349 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ffa17620/1b942507b35a408e9baa4bc0b96bafc2 [2021-12-17 20:53:11,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 20:53:11,353 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 20:53:11,356 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 20:53:11,357 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 20:53:11,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 20:53:11,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 08:53:11" (1/1) ... [2021-12-17 20:53:11,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36590457 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:53:11, skipping insertion in model container [2021-12-17 20:53:11,361 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 08:53:11" (1/1) ... [2021-12-17 20:53:11,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 20:53:11,489 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 20:53:11,847 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c[11668,11681] [2021-12-17 20:53:11,903 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c[18729,18742] [2021-12-17 20:53:12,462 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 20:53:12,486 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 20:53:12,512 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c[11668,11681] [2021-12-17 20:53:12,518 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c[18729,18742] [2021-12-17 20:53:12,848 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 20:53:12,873 INFO L208 MainTranslator]: Completed translation [2021-12-17 20:53:12,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:53:12 WrapperNode [2021-12-17 20:53:12,874 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 20:53:12,875 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 20:53:12,876 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 20:53:12,876 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 20:53:12,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:53:12" (1/1) ... [2021-12-17 20:53:12,956 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:53:12" (1/1) ... [2021-12-17 20:53:13,339 INFO L137 Inliner]: procedures = 37, calls = 22, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 5088 [2021-12-17 20:53:13,339 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 20:53:13,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 20:53:13,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 20:53:13,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 20:53:13,347 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:53:12" (1/1) ... [2021-12-17 20:53:13,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:53:12" (1/1) ... [2021-12-17 20:53:13,419 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:53:12" (1/1) ... [2021-12-17 20:53:13,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:53:12" (1/1) ... [2021-12-17 20:53:13,693 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:53:12" (1/1) ... [2021-12-17 20:53:13,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:53:12" (1/1) ... [2021-12-17 20:53:13,784 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:53:12" (1/1) ... [2021-12-17 20:53:13,866 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 20:53:13,867 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 20:53:13,867 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 20:53:13,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 20:53:13,869 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:53:12" (1/1) ... [2021-12-17 20:53:13,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 20:53:13,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 20:53:13,896 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 20:53:13,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 20:53:13,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 20:53:13,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 20:53:13,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 20:53:13,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 20:53:14,020 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 20:53:14,021 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 20:53:17,390 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 20:53:17,401 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 20:53:17,401 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 20:53:17,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:53:17 BoogieIcfgContainer [2021-12-17 20:53:17,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 20:53:17,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 20:53:17,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 20:53:17,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 20:53:17,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 08:53:11" (1/3) ... [2021-12-17 20:53:17,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d3e3218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 08:53:17, skipping insertion in model container [2021-12-17 20:53:17,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:53:12" (2/3) ... [2021-12-17 20:53:17,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d3e3218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 08:53:17, skipping insertion in model container [2021-12-17 20:53:17,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:53:17" (3/3) ... [2021-12-17 20:53:17,411 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label04.c [2021-12-17 20:53:17,415 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 20:53:17,415 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 20:53:17,457 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 20:53:17,462 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 20:53:17,463 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 20:53:17,489 INFO L276 IsEmpty]: Start isEmpty. Operand has 911 states, 908 states have (on average 1.8997797356828194) internal successors, (1725), 910 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:17,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-17 20:53:17,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:53:17,497 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] [2021-12-17 20:53:17,497 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:53:17,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:53:17,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1083425478, now seen corresponding path program 1 times [2021-12-17 20:53:17,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:53:17,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255545885] [2021-12-17 20:53:17,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:53:17,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:53:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:53:17,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:53:17,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:53:17,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255545885] [2021-12-17 20:53:17,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255545885] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:53:17,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:53:17,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 20:53:17,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754217897] [2021-12-17 20:53:17,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:53:17,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 20:53:17,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:53:17,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 20:53:17,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 20:53:17,718 INFO L87 Difference]: Start difference. First operand has 911 states, 908 states have (on average 1.8997797356828194) internal successors, (1725), 910 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:17,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:53:17,783 INFO L93 Difference]: Finished difference Result 1783 states and 3378 transitions. [2021-12-17 20:53:17,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 20:53:17,785 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-12-17 20:53:17,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:53:17,800 INFO L225 Difference]: With dead ends: 1783 [2021-12-17 20:53:17,800 INFO L226 Difference]: Without dead ends: 845 [2021-12-17 20:53:17,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 20:53:17,809 INFO L933 BasicCegarLoop]: 1656 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1656 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:53:17,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1656 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:53:17,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-12-17 20:53:17,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 845. [2021-12-17 20:53:17,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 843 states have (on average 1.8884934756820877) internal successors, (1592), 844 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:17,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1592 transitions. [2021-12-17 20:53:17,898 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1592 transitions. Word has length 34 [2021-12-17 20:53:17,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:53:17,898 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 1592 transitions. [2021-12-17 20:53:17,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:17,898 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1592 transitions. [2021-12-17 20:53:17,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-17 20:53:17,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:53:17,900 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] [2021-12-17 20:53:17,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 20:53:17,900 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:53:17,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:53:17,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1592898568, now seen corresponding path program 1 times [2021-12-17 20:53:17,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:53:17,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308739828] [2021-12-17 20:53:17,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:53:17,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:53:17,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:53:18,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:53:18,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:53:18,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308739828] [2021-12-17 20:53:18,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308739828] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:53:18,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:53:18,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 20:53:18,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578672479] [2021-12-17 20:53:18,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:53:18,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 20:53:18,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:53:18,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 20:53:18,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 20:53:18,034 INFO L87 Difference]: Start difference. First operand 845 states and 1592 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:18,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:53:18,128 INFO L93 Difference]: Finished difference Result 903 states and 1681 transitions. [2021-12-17 20:53:18,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 20:53:18,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-12-17 20:53:18,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:53:18,133 INFO L225 Difference]: With dead ends: 903 [2021-12-17 20:53:18,133 INFO L226 Difference]: Without dead ends: 845 [2021-12-17 20:53:18,137 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 [2021-12-17 20:53:18,139 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 3 mSDsluCounter, 4736 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6326 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:53:18,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6326 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:53:18,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-12-17 20:53:18,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 845. [2021-12-17 20:53:18,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 843 states have (on average 1.8517200474495847) internal successors, (1561), 844 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:18,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1561 transitions. [2021-12-17 20:53:18,165 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1561 transitions. Word has length 34 [2021-12-17 20:53:18,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:53:18,166 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 1561 transitions. [2021-12-17 20:53:18,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:18,166 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1561 transitions. [2021-12-17 20:53:18,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-17 20:53:18,168 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:53:18,168 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:53:18,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 20:53:18,168 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:53:18,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:53:18,169 INFO L85 PathProgramCache]: Analyzing trace with hash 372994572, now seen corresponding path program 1 times [2021-12-17 20:53:18,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:53:18,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515448378] [2021-12-17 20:53:18,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:53:18,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:53:18,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:53:18,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:53:18,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:53:18,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515448378] [2021-12-17 20:53:18,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515448378] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:53:18,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:53:18,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:53:18,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344009459] [2021-12-17 20:53:18,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:53:18,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 20:53:18,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:53:18,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 20:53:18,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 20:53:18,340 INFO L87 Difference]: Start difference. First operand 845 states and 1561 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 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) [2021-12-17 20:53:23,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:53:23,879 INFO L93 Difference]: Finished difference Result 3100 states and 5870 transitions. [2021-12-17 20:53:23,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 20:53:23,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 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 61 [2021-12-17 20:53:23,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:53:23,888 INFO L225 Difference]: With dead ends: 3100 [2021-12-17 20:53:23,889 INFO L226 Difference]: Without dead ends: 2347 [2021-12-17 20:53:23,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 20:53:23,891 INFO L933 BasicCegarLoop]: 815 mSDtfsCounter, 2436 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5154 mSolverCounterSat, 1250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2436 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 6404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1250 IncrementalHoareTripleChecker+Valid, 5154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-17 20:53:23,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2436 Valid, 833 Invalid, 6404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1250 Valid, 5154 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-12-17 20:53:23,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2021-12-17 20:53:23,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 2347. [2021-12-17 20:53:23,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2345 states have (on average 1.508315565031983) internal successors, (3537), 2346 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:23,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 3537 transitions. [2021-12-17 20:53:23,937 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 3537 transitions. Word has length 61 [2021-12-17 20:53:23,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:53:23,938 INFO L470 AbstractCegarLoop]: Abstraction has 2347 states and 3537 transitions. [2021-12-17 20:53:23,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 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) [2021-12-17 20:53:23,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 3537 transitions. [2021-12-17 20:53:23,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 20:53:23,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:53:23,940 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:53:23,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 20:53:23,941 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:53:23,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:53:23,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1337087153, now seen corresponding path program 1 times [2021-12-17 20:53:23,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:53:23,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497544712] [2021-12-17 20:53:23,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:53:23,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:53:23,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:53:23,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:53:23,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:53:23,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497544712] [2021-12-17 20:53:23,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497544712] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:53:23,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:53:23,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:53:23,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463531393] [2021-12-17 20:53:23,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:53:23,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:53:23,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:53:23,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:53:23,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:53:23,996 INFO L87 Difference]: Start difference. First operand 2347 states and 3537 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:24,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:53:24,024 INFO L93 Difference]: Finished difference Result 2449 states and 3697 transitions. [2021-12-17 20:53:24,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:53:24,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-17 20:53:24,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:53:24,034 INFO L225 Difference]: With dead ends: 2449 [2021-12-17 20:53:24,034 INFO L226 Difference]: Without dead ends: 2395 [2021-12-17 20:53:24,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:53:24,036 INFO L933 BasicCegarLoop]: 1577 mSDtfsCounter, 1498 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1676 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 [2021-12-17 20:53:24,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1676 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:53:24,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2021-12-17 20:53:24,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 2393. [2021-12-17 20:53:24,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2393 states, 2391 states have (on average 1.5098285236302802) internal successors, (3610), 2392 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:24,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2393 states to 2393 states and 3610 transitions. [2021-12-17 20:53:24,083 INFO L78 Accepts]: Start accepts. Automaton has 2393 states and 3610 transitions. Word has length 64 [2021-12-17 20:53:24,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:53:24,083 INFO L470 AbstractCegarLoop]: Abstraction has 2393 states and 3610 transitions. [2021-12-17 20:53:24,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:24,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2393 states and 3610 transitions. [2021-12-17 20:53:24,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 20:53:24,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:53:24,090 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:53:24,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 20:53:24,090 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:53:24,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:53:24,092 INFO L85 PathProgramCache]: Analyzing trace with hash -119101755, now seen corresponding path program 1 times [2021-12-17 20:53:24,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:53:24,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064171514] [2021-12-17 20:53:24,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:53:24,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:53:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:53:24,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:53:24,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:53:24,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064171514] [2021-12-17 20:53:24,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064171514] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:53:24,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:53:24,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 20:53:24,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776910998] [2021-12-17 20:53:24,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:53:24,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 20:53:24,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:53:24,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 20:53:24,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 20:53:24,222 INFO L87 Difference]: Start difference. First operand 2393 states and 3610 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:24,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:53:24,405 INFO L93 Difference]: Finished difference Result 3393 states and 5190 transitions. [2021-12-17 20:53:24,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 20:53:24,406 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-17 20:53:24,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:53:24,418 INFO L225 Difference]: With dead ends: 3393 [2021-12-17 20:53:24,419 INFO L226 Difference]: Without dead ends: 3293 [2021-12-17 20:53:24,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-17 20:53:24,421 INFO L933 BasicCegarLoop]: 1555 mSDtfsCounter, 8419 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8419 SdHoareTripleChecker+Valid, 2463 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 20:53:24,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8419 Valid, 2463 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 20:53:24,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3293 states. [2021-12-17 20:53:24,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3293 to 2491. [2021-12-17 20:53:24,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2491 states, 2489 states have (on average 1.5118521494576136) internal successors, (3763), 2490 states have internal predecessors, (3763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:24,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2491 states to 2491 states and 3763 transitions. [2021-12-17 20:53:24,475 INFO L78 Accepts]: Start accepts. Automaton has 2491 states and 3763 transitions. Word has length 64 [2021-12-17 20:53:24,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:53:24,475 INFO L470 AbstractCegarLoop]: Abstraction has 2491 states and 3763 transitions. [2021-12-17 20:53:24,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:24,476 INFO L276 IsEmpty]: Start isEmpty. Operand 2491 states and 3763 transitions. [2021-12-17 20:53:24,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 20:53:24,477 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:53:24,477 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:53:24,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 20:53:24,478 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:53:24,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:53:24,478 INFO L85 PathProgramCache]: Analyzing trace with hash 91634997, now seen corresponding path program 1 times [2021-12-17 20:53:24,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:53:24,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393686819] [2021-12-17 20:53:24,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:53:24,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:53:24,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:53:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:53:24,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:53:24,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393686819] [2021-12-17 20:53:24,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393686819] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:53:24,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:53:24,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:53:24,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630001463] [2021-12-17 20:53:24,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:53:24,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:53:24,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:53:24,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:53:24,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:53:24,539 INFO L87 Difference]: Start difference. First operand 2491 states and 3763 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:24,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:53:24,582 INFO L93 Difference]: Finished difference Result 2865 states and 4347 transitions. [2021-12-17 20:53:24,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:53:24,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-17 20:53:24,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:53:24,594 INFO L225 Difference]: With dead ends: 2865 [2021-12-17 20:53:24,594 INFO L226 Difference]: Without dead ends: 2667 [2021-12-17 20:53:24,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:53:24,599 INFO L933 BasicCegarLoop]: 1557 mSDtfsCounter, 1489 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 1635 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:53:24,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1489 Valid, 1635 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:53:24,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2021-12-17 20:53:24,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 2661. [2021-12-17 20:53:24,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2661 states, 2659 states have (on average 1.5122226400902594) internal successors, (4021), 2660 states have internal predecessors, (4021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:24,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 4021 transitions. [2021-12-17 20:53:24,661 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 4021 transitions. Word has length 66 [2021-12-17 20:53:24,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:53:24,661 INFO L470 AbstractCegarLoop]: Abstraction has 2661 states and 4021 transitions. [2021-12-17 20:53:24,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:24,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 4021 transitions. [2021-12-17 20:53:24,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 20:53:24,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:53:24,663 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:53:24,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 20:53:24,664 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:53:24,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:53:24,665 INFO L85 PathProgramCache]: Analyzing trace with hash 158128509, now seen corresponding path program 1 times [2021-12-17 20:53:24,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:53:24,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531767277] [2021-12-17 20:53:24,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:53:24,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:53:24,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:53:24,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:53:24,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:53:24,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531767277] [2021-12-17 20:53:24,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531767277] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:53:24,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:53:24,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 20:53:24,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407437235] [2021-12-17 20:53:24,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:53:24,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 20:53:24,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:53:24,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 20:53:24,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-17 20:53:24,852 INFO L87 Difference]: Start difference. First operand 2661 states and 4021 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:25,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:53:25,061 INFO L93 Difference]: Finished difference Result 3031 states and 4591 transitions. [2021-12-17 20:53:25,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 20:53:25,062 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-17 20:53:25,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:53:25,070 INFO L225 Difference]: With dead ends: 3031 [2021-12-17 20:53:25,070 INFO L226 Difference]: Without dead ends: 2663 [2021-12-17 20:53:25,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-12-17 20:53:25,072 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 4663 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4663 SdHoareTripleChecker+Valid, 1899 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:53:25,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4663 Valid, 1899 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:53:25,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2663 states. [2021-12-17 20:53:25,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2663 to 2661. [2021-12-17 20:53:25,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2661 states, 2659 states have (on average 1.5107183151560737) internal successors, (4017), 2660 states have internal predecessors, (4017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:25,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 4017 transitions. [2021-12-17 20:53:25,137 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 4017 transitions. Word has length 66 [2021-12-17 20:53:25,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:53:25,138 INFO L470 AbstractCegarLoop]: Abstraction has 2661 states and 4017 transitions. [2021-12-17 20:53:25,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:25,138 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 4017 transitions. [2021-12-17 20:53:25,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 20:53:25,139 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:53:25,140 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:53:25,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 20:53:25,140 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:53:25,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:53:25,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1100417095, now seen corresponding path program 1 times [2021-12-17 20:53:25,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:53:25,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698742306] [2021-12-17 20:53:25,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:53:25,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:53:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:53:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:53:25,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:53:25,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698742306] [2021-12-17 20:53:25,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698742306] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:53:25,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:53:25,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:53:25,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229003074] [2021-12-17 20:53:25,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:53:25,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:53:25,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:53:25,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:53:25,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:53:25,176 INFO L87 Difference]: Start difference. First operand 2661 states and 4017 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:25,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:53:25,236 INFO L93 Difference]: Finished difference Result 3349 states and 5067 transitions. [2021-12-17 20:53:25,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:53:25,237 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-17 20:53:25,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:53:25,247 INFO L225 Difference]: With dead ends: 3349 [2021-12-17 20:53:25,247 INFO L226 Difference]: Without dead ends: 2981 [2021-12-17 20:53:25,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:53:25,249 INFO L933 BasicCegarLoop]: 1591 mSDtfsCounter, 1502 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1502 SdHoareTripleChecker+Valid, 1686 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 [2021-12-17 20:53:25,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1502 Valid, 1686 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:53:25,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2981 states. [2021-12-17 20:53:25,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2981 to 2979. [2021-12-17 20:53:25,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2979 states, 2977 states have (on average 1.5092374874034262) internal successors, (4493), 2978 states have internal predecessors, (4493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:25,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2979 states to 2979 states and 4493 transitions. [2021-12-17 20:53:25,332 INFO L78 Accepts]: Start accepts. Automaton has 2979 states and 4493 transitions. Word has length 66 [2021-12-17 20:53:25,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:53:25,333 INFO L470 AbstractCegarLoop]: Abstraction has 2979 states and 4493 transitions. [2021-12-17 20:53:25,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:25,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2979 states and 4493 transitions. [2021-12-17 20:53:25,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 20:53:25,334 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:53:25,335 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:53:25,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 20:53:25,335 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:53:25,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:53:25,336 INFO L85 PathProgramCache]: Analyzing trace with hash -826729383, now seen corresponding path program 1 times [2021-12-17 20:53:25,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:53:25,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923114172] [2021-12-17 20:53:25,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:53:25,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:53:25,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:53:25,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:53:25,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:53:25,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923114172] [2021-12-17 20:53:25,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923114172] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:53:25,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:53:25,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:53:25,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625943871] [2021-12-17 20:53:25,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:53:25,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:53:25,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:53:25,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:53:25,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:53:25,368 INFO L87 Difference]: Start difference. First operand 2979 states and 4493 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:25,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:53:25,453 INFO L93 Difference]: Finished difference Result 4255 states and 6415 transitions. [2021-12-17 20:53:25,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:53:25,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-17 20:53:25,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:53:25,467 INFO L225 Difference]: With dead ends: 4255 [2021-12-17 20:53:25,467 INFO L226 Difference]: Without dead ends: 3569 [2021-12-17 20:53:25,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:53:25,470 INFO L933 BasicCegarLoop]: 1604 mSDtfsCounter, 1506 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1506 SdHoareTripleChecker+Valid, 1695 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 [2021-12-17 20:53:25,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1506 Valid, 1695 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:53:25,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3569 states. [2021-12-17 20:53:25,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3569 to 3567. [2021-12-17 20:53:25,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3567 states, 3565 states have (on average 1.502664796633941) internal successors, (5357), 3566 states have internal predecessors, (5357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:25,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3567 states to 3567 states and 5357 transitions. [2021-12-17 20:53:25,586 INFO L78 Accepts]: Start accepts. Automaton has 3567 states and 5357 transitions. Word has length 66 [2021-12-17 20:53:25,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:53:25,587 INFO L470 AbstractCegarLoop]: Abstraction has 3567 states and 5357 transitions. [2021-12-17 20:53:25,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:25,587 INFO L276 IsEmpty]: Start isEmpty. Operand 3567 states and 5357 transitions. [2021-12-17 20:53:25,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 20:53:25,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:53:25,589 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:53:25,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 20:53:25,589 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:53:25,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:53:25,590 INFO L85 PathProgramCache]: Analyzing trace with hash 992342265, now seen corresponding path program 1 times [2021-12-17 20:53:25,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:53:25,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645144643] [2021-12-17 20:53:25,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:53:25,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:53:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:53:25,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:53:25,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:53:25,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645144643] [2021-12-17 20:53:25,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645144643] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:53:25,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:53:25,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:53:25,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011710852] [2021-12-17 20:53:25,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:53:25,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:53:25,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:53:25,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:53:25,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:53:25,621 INFO L87 Difference]: Start difference. First operand 3567 states and 5357 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:25,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:53:25,751 INFO L93 Difference]: Finished difference Result 5923 states and 8847 transitions. [2021-12-17 20:53:25,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:53:25,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-17 20:53:25,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:53:25,768 INFO L225 Difference]: With dead ends: 5923 [2021-12-17 20:53:25,768 INFO L226 Difference]: Without dead ends: 4649 [2021-12-17 20:53:25,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:53:25,772 INFO L933 BasicCegarLoop]: 1617 mSDtfsCounter, 1510 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1510 SdHoareTripleChecker+Valid, 1704 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 [2021-12-17 20:53:25,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1510 Valid, 1704 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:53:25,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4649 states. [2021-12-17 20:53:25,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4649 to 4647. [2021-12-17 20:53:25,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4647 states, 4645 states have (on average 1.48740581270183) internal successors, (6909), 4646 states have internal predecessors, (6909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:25,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4647 states to 4647 states and 6909 transitions. [2021-12-17 20:53:25,932 INFO L78 Accepts]: Start accepts. Automaton has 4647 states and 6909 transitions. Word has length 66 [2021-12-17 20:53:25,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:53:25,932 INFO L470 AbstractCegarLoop]: Abstraction has 4647 states and 6909 transitions. [2021-12-17 20:53:25,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:25,933 INFO L276 IsEmpty]: Start isEmpty. Operand 4647 states and 6909 transitions. [2021-12-17 20:53:25,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 20:53:25,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:53:25,934 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:53:25,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 20:53:25,934 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:53:25,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:53:25,935 INFO L85 PathProgramCache]: Analyzing trace with hash 192293446, now seen corresponding path program 1 times [2021-12-17 20:53:25,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:53:25,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477738592] [2021-12-17 20:53:25,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:53:25,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:53:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:53:26,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:53:26,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:53:26,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477738592] [2021-12-17 20:53:26,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477738592] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:53:26,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:53:26,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 20:53:26,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816019424] [2021-12-17 20:53:26,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:53:26,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 20:53:26,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:53:26,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 20:53:26,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 20:53:26,008 INFO L87 Difference]: Start difference. First operand 4647 states and 6909 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:26,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:53:26,316 INFO L93 Difference]: Finished difference Result 6405 states and 9443 transitions. [2021-12-17 20:53:26,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 20:53:26,317 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-17 20:53:26,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:53:26,330 INFO L225 Difference]: With dead ends: 6405 [2021-12-17 20:53:26,330 INFO L226 Difference]: Without dead ends: 6403 [2021-12-17 20:53:26,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-17 20:53:26,333 INFO L933 BasicCegarLoop]: 1603 mSDtfsCounter, 600 mSDsluCounter, 9089 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 10692 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:53:26,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 10692 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:53:26,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6403 states. [2021-12-17 20:53:26,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6403 to 4743. [2021-12-17 20:53:26,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4743 states, 4741 states have (on average 1.4741615692891794) internal successors, (6989), 4742 states have internal predecessors, (6989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:26,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4743 states to 4743 states and 6989 transitions. [2021-12-17 20:53:26,520 INFO L78 Accepts]: Start accepts. Automaton has 4743 states and 6989 transitions. Word has length 67 [2021-12-17 20:53:26,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:53:26,520 INFO L470 AbstractCegarLoop]: Abstraction has 4743 states and 6989 transitions. [2021-12-17 20:53:26,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:26,521 INFO L276 IsEmpty]: Start isEmpty. Operand 4743 states and 6989 transitions. [2021-12-17 20:53:26,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 20:53:26,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:53:26,522 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:53:26,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 20:53:26,522 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:53:26,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:53:26,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1338319212, now seen corresponding path program 1 times [2021-12-17 20:53:26,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:53:26,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074968397] [2021-12-17 20:53:26,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:53:26,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:53:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:53:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:53:26,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:53:26,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074968397] [2021-12-17 20:53:26,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074968397] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:53:26,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:53:26,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:53:26,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900927800] [2021-12-17 20:53:26,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:53:26,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:53:26,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:53:26,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:53:26,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:53:26,551 INFO L87 Difference]: Start difference. First operand 4743 states and 6989 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) [2021-12-17 20:53:26,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:53:26,731 INFO L93 Difference]: Finished difference Result 7246 states and 10643 transitions. [2021-12-17 20:53:26,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:53:26,731 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 [2021-12-17 20:53:26,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:53:26,743 INFO L225 Difference]: With dead ends: 7246 [2021-12-17 20:53:26,743 INFO L226 Difference]: Without dead ends: 5867 [2021-12-17 20:53:26,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:53:26,747 INFO L933 BasicCegarLoop]: 1625 mSDtfsCounter, 1511 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1511 SdHoareTripleChecker+Valid, 1708 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 [2021-12-17 20:53:26,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1511 Valid, 1708 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:53:26,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5867 states. [2021-12-17 20:53:27,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5867 to 5865. [2021-12-17 20:53:27,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5865 states, 5863 states have (on average 1.4625618284154869) internal successors, (8575), 5864 states have internal predecessors, (8575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:27,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5865 states to 5865 states and 8575 transitions. [2021-12-17 20:53:27,024 INFO L78 Accepts]: Start accepts. Automaton has 5865 states and 8575 transitions. Word has length 68 [2021-12-17 20:53:27,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:53:27,025 INFO L470 AbstractCegarLoop]: Abstraction has 5865 states and 8575 transitions. [2021-12-17 20:53:27,025 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) [2021-12-17 20:53:27,025 INFO L276 IsEmpty]: Start isEmpty. Operand 5865 states and 8575 transitions. [2021-12-17 20:53:27,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-17 20:53:27,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:53:27,028 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:53:27,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 20:53:27,029 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:53:27,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:53:27,029 INFO L85 PathProgramCache]: Analyzing trace with hash -482219864, now seen corresponding path program 1 times [2021-12-17 20:53:27,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:53:27,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182934785] [2021-12-17 20:53:27,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:53:27,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:53:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:53:27,094 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 20:53:27,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:53:27,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182934785] [2021-12-17 20:53:27,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182934785] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:53:27,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:53:27,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 20:53:27,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153502540] [2021-12-17 20:53:27,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:53:27,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 20:53:27,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:53:27,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 20:53:27,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 20:53:27,096 INFO L87 Difference]: Start difference. First operand 5865 states and 8575 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:27,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:53:27,961 INFO L93 Difference]: Finished difference Result 24437 states and 35173 transitions. [2021-12-17 20:53:27,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 20:53:27,962 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-17 20:53:27,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:53:28,003 INFO L225 Difference]: With dead ends: 24437 [2021-12-17 20:53:28,004 INFO L226 Difference]: Without dead ends: 20867 [2021-12-17 20:53:28,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 20:53:28,016 INFO L933 BasicCegarLoop]: 1635 mSDtfsCounter, 6639 mSDsluCounter, 1950 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6639 SdHoareTripleChecker+Valid, 3585 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 20:53:28,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6639 Valid, 3585 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 20:53:28,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20867 states. [2021-12-17 20:53:28,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20867 to 9433. [2021-12-17 20:53:28,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9433 states, 9431 states have (on average 1.447036369419998) internal successors, (13647), 9432 states have internal predecessors, (13647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:28,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9433 states to 9433 states and 13647 transitions. [2021-12-17 20:53:28,478 INFO L78 Accepts]: Start accepts. Automaton has 9433 states and 13647 transitions. Word has length 95 [2021-12-17 20:53:28,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:53:28,479 INFO L470 AbstractCegarLoop]: Abstraction has 9433 states and 13647 transitions. [2021-12-17 20:53:28,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:28,479 INFO L276 IsEmpty]: Start isEmpty. Operand 9433 states and 13647 transitions. [2021-12-17 20:53:28,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-17 20:53:28,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:53:28,483 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:53:28,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 20:53:28,483 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:53:28,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:53:28,484 INFO L85 PathProgramCache]: Analyzing trace with hash -452697646, now seen corresponding path program 1 times [2021-12-17 20:53:28,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:53:28,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493524526] [2021-12-17 20:53:28,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:53:28,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:53:28,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:53:28,558 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 20:53:28,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:53:28,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493524526] [2021-12-17 20:53:28,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493524526] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:53:28,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:53:28,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 20:53:28,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488826795] [2021-12-17 20:53:28,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:53:28,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 20:53:28,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:53:28,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 20:53:28,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 20:53:28,561 INFO L87 Difference]: Start difference. First operand 9433 states and 13647 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:29,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:53:29,737 INFO L93 Difference]: Finished difference Result 28005 states and 40245 transitions. [2021-12-17 20:53:29,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 20:53:29,738 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-17 20:53:29,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:53:29,788 INFO L225 Difference]: With dead ends: 28005 [2021-12-17 20:53:29,788 INFO L226 Difference]: Without dead ends: 24435 [2021-12-17 20:53:29,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 20:53:29,802 INFO L933 BasicCegarLoop]: 1637 mSDtfsCounter, 6527 mSDsluCounter, 2007 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6527 SdHoareTripleChecker+Valid, 3644 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 20:53:29,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6527 Valid, 3644 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 20:53:29,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24435 states. [2021-12-17 20:53:30,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24435 to 14793. [2021-12-17 20:53:30,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14793 states, 14791 states have (on average 1.4343181664525726) internal successors, (21215), 14792 states have internal predecessors, (21215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:30,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14793 states to 14793 states and 21215 transitions. [2021-12-17 20:53:30,650 INFO L78 Accepts]: Start accepts. Automaton has 14793 states and 21215 transitions. Word has length 95 [2021-12-17 20:53:30,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:53:30,650 INFO L470 AbstractCegarLoop]: Abstraction has 14793 states and 21215 transitions. [2021-12-17 20:53:30,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:30,651 INFO L276 IsEmpty]: Start isEmpty. Operand 14793 states and 21215 transitions. [2021-12-17 20:53:30,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-17 20:53:30,654 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:53:30,654 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:53:30,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 20:53:30,655 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:53:30,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:53:30,656 INFO L85 PathProgramCache]: Analyzing trace with hash -179009934, now seen corresponding path program 1 times [2021-12-17 20:53:30,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:53:30,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050984132] [2021-12-17 20:53:30,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:53:30,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:53:30,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:53:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 20:53:30,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:53:30,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050984132] [2021-12-17 20:53:30,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050984132] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:53:30,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:53:30,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 20:53:30,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957515728] [2021-12-17 20:53:30,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:53:30,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 20:53:30,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:53:30,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 20:53:30,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 20:53:30,734 INFO L87 Difference]: Start difference. First operand 14793 states and 21215 transitions. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:31,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:53:31,842 INFO L93 Difference]: Finished difference Result 31573 states and 45317 transitions. [2021-12-17 20:53:31,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 20:53:31,842 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-17 20:53:31,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:53:31,907 INFO L225 Difference]: With dead ends: 31573 [2021-12-17 20:53:31,907 INFO L226 Difference]: Without dead ends: 28003 [2021-12-17 20:53:31,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 20:53:31,927 INFO L933 BasicCegarLoop]: 1637 mSDtfsCounter, 6537 mSDsluCounter, 2039 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6537 SdHoareTripleChecker+Valid, 3676 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 20:53:31,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6537 Valid, 3676 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 20:53:31,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28003 states. [2021-12-17 20:53:32,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28003 to 18361. [2021-12-17 20:53:32,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18361 states, 18359 states have (on average 1.431831799117599) internal successors, (26287), 18360 states have internal predecessors, (26287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:32,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18361 states to 18361 states and 26287 transitions. [2021-12-17 20:53:32,975 INFO L78 Accepts]: Start accepts. Automaton has 18361 states and 26287 transitions. Word has length 95 [2021-12-17 20:53:32,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:53:32,975 INFO L470 AbstractCegarLoop]: Abstraction has 18361 states and 26287 transitions. [2021-12-17 20:53:32,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:32,976 INFO L276 IsEmpty]: Start isEmpty. Operand 18361 states and 26287 transitions. [2021-12-17 20:53:32,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-17 20:53:32,980 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:53:32,980 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:53:32,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 20:53:32,981 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:53:32,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:53:32,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1640061714, now seen corresponding path program 1 times [2021-12-17 20:53:32,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:53:32,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378352569] [2021-12-17 20:53:32,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:53:32,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:53:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:53:33,046 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 20:53:33,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:53:33,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378352569] [2021-12-17 20:53:33,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378352569] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:53:33,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:53:33,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 20:53:33,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674573816] [2021-12-17 20:53:33,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:53:33,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 20:53:33,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:53:33,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 20:53:33,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 20:53:33,049 INFO L87 Difference]: Start difference. First operand 18361 states and 26287 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:34,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:53:34,112 INFO L93 Difference]: Finished difference Result 35141 states and 50389 transitions. [2021-12-17 20:53:34,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 20:53:34,112 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-17 20:53:34,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:53:34,160 INFO L225 Difference]: With dead ends: 35141 [2021-12-17 20:53:34,160 INFO L226 Difference]: Without dead ends: 31571 [2021-12-17 20:53:34,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 20:53:34,173 INFO L933 BasicCegarLoop]: 1635 mSDtfsCounter, 6608 mSDsluCounter, 2005 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6608 SdHoareTripleChecker+Valid, 3640 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 20:53:34,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6608 Valid, 3640 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 20:53:34,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31571 states. [2021-12-17 20:53:35,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31571 to 21929. [2021-12-17 20:53:35,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21929 states, 21927 states have (on average 1.430154603912984) internal successors, (31359), 21928 states have internal predecessors, (31359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:35,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21929 states to 21929 states and 31359 transitions. [2021-12-17 20:53:35,135 INFO L78 Accepts]: Start accepts. Automaton has 21929 states and 31359 transitions. Word has length 95 [2021-12-17 20:53:35,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:53:35,135 INFO L470 AbstractCegarLoop]: Abstraction has 21929 states and 31359 transitions. [2021-12-17 20:53:35,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:35,136 INFO L276 IsEmpty]: Start isEmpty. Operand 21929 states and 31359 transitions. [2021-12-17 20:53:35,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-17 20:53:35,141 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:53:35,142 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:53:35,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 20:53:35,142 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:53:35,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:53:35,143 INFO L85 PathProgramCache]: Analyzing trace with hash -906023264, now seen corresponding path program 1 times [2021-12-17 20:53:35,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:53:35,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165129334] [2021-12-17 20:53:35,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:53:35,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:53:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:53:35,184 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:53:35,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:53:35,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165129334] [2021-12-17 20:53:35,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165129334] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:53:35,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:53:35,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:53:35,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145014579] [2021-12-17 20:53:35,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:53:35,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:53:35,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:53:35,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:53:35,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:53:35,186 INFO L87 Difference]: Start difference. First operand 21929 states and 31359 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:35,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:53:35,775 INFO L93 Difference]: Finished difference Result 35691 states and 51109 transitions. [2021-12-17 20:53:35,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:53:35,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 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 97 [2021-12-17 20:53:35,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:53:35,804 INFO L225 Difference]: With dead ends: 35691 [2021-12-17 20:53:35,804 INFO L226 Difference]: Without dead ends: 16057 [2021-12-17 20:53:35,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:53:35,840 INFO L933 BasicCegarLoop]: 1601 mSDtfsCounter, 54 mSDsluCounter, 1545 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3146 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:53:35,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 3146 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:53:35,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16057 states. [2021-12-17 20:53:36,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16057 to 16055. [2021-12-17 20:53:36,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16055 states, 16053 states have (on average 1.4343736373263565) internal successors, (23026), 16054 states have internal predecessors, (23026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:36,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16055 states to 16055 states and 23026 transitions. [2021-12-17 20:53:36,768 INFO L78 Accepts]: Start accepts. Automaton has 16055 states and 23026 transitions. Word has length 97 [2021-12-17 20:53:36,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:53:36,769 INFO L470 AbstractCegarLoop]: Abstraction has 16055 states and 23026 transitions. [2021-12-17 20:53:36,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:36,769 INFO L276 IsEmpty]: Start isEmpty. Operand 16055 states and 23026 transitions. [2021-12-17 20:53:36,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-17 20:53:36,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:53:36,774 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:53:36,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 20:53:36,774 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:53:36,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:53:36,775 INFO L85 PathProgramCache]: Analyzing trace with hash -615309075, now seen corresponding path program 1 times [2021-12-17 20:53:36,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:53:36,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705776357] [2021-12-17 20:53:36,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:53:36,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:53:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:53:36,840 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 20:53:36,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:53:36,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705776357] [2021-12-17 20:53:36,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705776357] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:53:36,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:53:36,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 20:53:36,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418071261] [2021-12-17 20:53:36,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:53:36,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 20:53:36,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:53:36,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 20:53:36,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 20:53:36,843 INFO L87 Difference]: Start difference. First operand 16055 states and 23026 transitions. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:38,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:53:38,139 INFO L93 Difference]: Finished difference Result 28547 states and 40952 transitions. [2021-12-17 20:53:38,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 20:53:38,140 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 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 97 [2021-12-17 20:53:38,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:53:38,170 INFO L225 Difference]: With dead ends: 28547 [2021-12-17 20:53:38,170 INFO L226 Difference]: Without dead ends: 26049 [2021-12-17 20:53:38,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 20:53:38,180 INFO L933 BasicCegarLoop]: 1634 mSDtfsCounter, 6588 mSDsluCounter, 1974 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6588 SdHoareTripleChecker+Valid, 3608 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 20:53:38,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6588 Valid, 3608 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 20:53:38,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26049 states. [2021-12-17 20:53:38,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26049 to 18551. [2021-12-17 20:53:38,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18551 states, 18549 states have (on average 1.4328535231009758) internal successors, (26578), 18550 states have internal predecessors, (26578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:38,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18551 states to 18551 states and 26578 transitions. [2021-12-17 20:53:38,987 INFO L78 Accepts]: Start accepts. Automaton has 18551 states and 26578 transitions. Word has length 97 [2021-12-17 20:53:38,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:53:38,988 INFO L470 AbstractCegarLoop]: Abstraction has 18551 states and 26578 transitions. [2021-12-17 20:53:38,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:38,988 INFO L276 IsEmpty]: Start isEmpty. Operand 18551 states and 26578 transitions. [2021-12-17 20:53:38,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-17 20:53:38,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:53:38,993 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:53:38,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 20:53:38,994 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:53:38,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:53:38,994 INFO L85 PathProgramCache]: Analyzing trace with hash -605888281, now seen corresponding path program 1 times [2021-12-17 20:53:38,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:53:38,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451816850] [2021-12-17 20:53:38,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:53:38,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:53:39,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:53:39,052 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:53:39,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:53:39,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451816850] [2021-12-17 20:53:39,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451816850] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:53:39,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:53:39,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:53:39,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004300872] [2021-12-17 20:53:39,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:53:39,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:53:39,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:53:39,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:53:39,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:53:39,056 INFO L87 Difference]: Start difference. First operand 18551 states and 26578 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:39,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:53:39,529 INFO L93 Difference]: Finished difference Result 26667 states and 38124 transitions. [2021-12-17 20:53:39,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:53:39,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-12-17 20:53:39,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:53:39,547 INFO L225 Difference]: With dead ends: 26667 [2021-12-17 20:53:39,548 INFO L226 Difference]: Without dead ends: 10441 [2021-12-17 20:53:39,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:53:39,565 INFO L933 BasicCegarLoop]: 1594 mSDtfsCounter, 48 mSDsluCounter, 1537 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 3131 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:53:39,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 3131 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:53:39,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10441 states. [2021-12-17 20:53:39,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10441 to 10439. [2021-12-17 20:53:39,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10439 states, 10437 states have (on average 1.4304876880329596) internal successors, (14930), 10438 states have internal predecessors, (14930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:39,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10439 states to 10439 states and 14930 transitions. [2021-12-17 20:53:39,990 INFO L78 Accepts]: Start accepts. Automaton has 10439 states and 14930 transitions. Word has length 98 [2021-12-17 20:53:39,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:53:39,990 INFO L470 AbstractCegarLoop]: Abstraction has 10439 states and 14930 transitions. [2021-12-17 20:53:39,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:39,990 INFO L276 IsEmpty]: Start isEmpty. Operand 10439 states and 14930 transitions. [2021-12-17 20:53:39,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-17 20:53:39,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:53:39,993 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:53:39,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 20:53:39,994 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:53:39,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:53:39,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1773467421, now seen corresponding path program 1 times [2021-12-17 20:53:39,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:53:39,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081678909] [2021-12-17 20:53:39,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:53:39,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:53:40,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:53:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:53:40,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:53:40,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081678909] [2021-12-17 20:53:40,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081678909] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:53:40,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:53:40,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:53:40,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399538987] [2021-12-17 20:53:40,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:53:40,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:53:40,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:53:40,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:53:40,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:53:40,032 INFO L87 Difference]: Start difference. First operand 10439 states and 14930 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:40,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:53:40,217 INFO L93 Difference]: Finished difference Result 14499 states and 20652 transitions. [2021-12-17 20:53:40,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:53:40,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-12-17 20:53:40,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:53:40,224 INFO L225 Difference]: With dead ends: 14499 [2021-12-17 20:53:40,224 INFO L226 Difference]: Without dead ends: 6385 [2021-12-17 20:53:40,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:53:40,232 INFO L933 BasicCegarLoop]: 1587 mSDtfsCounter, 44 mSDsluCounter, 1529 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3116 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:53:40,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 3116 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:53:40,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6385 states. [2021-12-17 20:53:40,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6385 to 6383. [2021-12-17 20:53:40,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6383 states, 6381 states have (on average 1.435198244789218) internal successors, (9158), 6382 states have internal predecessors, (9158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:40,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6383 states to 6383 states and 9158 transitions. [2021-12-17 20:53:40,423 INFO L78 Accepts]: Start accepts. Automaton has 6383 states and 9158 transitions. Word has length 98 [2021-12-17 20:53:40,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:53:40,424 INFO L470 AbstractCegarLoop]: Abstraction has 6383 states and 9158 transitions. [2021-12-17 20:53:40,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:40,424 INFO L276 IsEmpty]: Start isEmpty. Operand 6383 states and 9158 transitions. [2021-12-17 20:53:40,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-17 20:53:40,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:53:40,425 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:53:40,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 20:53:40,426 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:53:40,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:53:40,426 INFO L85 PathProgramCache]: Analyzing trace with hash -934897581, now seen corresponding path program 1 times [2021-12-17 20:53:40,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:53:40,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533085314] [2021-12-17 20:53:40,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:53:40,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:53:40,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:53:40,459 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:53:40,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:53:40,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533085314] [2021-12-17 20:53:40,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533085314] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:53:40,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:53:40,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:53:40,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872837301] [2021-12-17 20:53:40,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:53:40,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:53:40,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:53:40,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:53:40,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:53:40,462 INFO L87 Difference]: Start difference. First operand 6383 states and 9158 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:40,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:53:40,572 INFO L93 Difference]: Finished difference Result 8415 states and 11994 transitions. [2021-12-17 20:53:40,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:53:40,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-12-17 20:53:40,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:53:40,576 INFO L225 Difference]: With dead ends: 8415 [2021-12-17 20:53:40,576 INFO L226 Difference]: Without dead ends: 4357 [2021-12-17 20:53:40,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:53:40,580 INFO L933 BasicCegarLoop]: 1580 mSDtfsCounter, 40 mSDsluCounter, 1521 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 3101 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:53:40,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 3101 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:53:40,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4357 states. [2021-12-17 20:53:40,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4357 to 4355. [2021-12-17 20:53:40,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4355 states, 4353 states have (on average 1.4468182862393753) internal successors, (6298), 4354 states have internal predecessors, (6298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:40,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4355 states to 4355 states and 6298 transitions. [2021-12-17 20:53:40,676 INFO L78 Accepts]: Start accepts. Automaton has 4355 states and 6298 transitions. Word has length 98 [2021-12-17 20:53:40,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:53:40,677 INFO L470 AbstractCegarLoop]: Abstraction has 4355 states and 6298 transitions. [2021-12-17 20:53:40,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:40,677 INFO L276 IsEmpty]: Start isEmpty. Operand 4355 states and 6298 transitions. [2021-12-17 20:53:40,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-17 20:53:40,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:53:40,678 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:53:40,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 20:53:40,679 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:53:40,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:53:40,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1022016375, now seen corresponding path program 1 times [2021-12-17 20:53:40,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:53:40,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394876788] [2021-12-17 20:53:40,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:53:40,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:53:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:53:40,834 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:53:40,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:53:40,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394876788] [2021-12-17 20:53:40,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394876788] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 20:53:40,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034091604] [2021-12-17 20:53:40,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:53:40,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 20:53:40,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 20:53:40,836 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 20:53:40,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 20:53:40,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:53:40,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 20:53:40,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 20:53:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 20:53:41,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 20:53:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 20:53:41,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034091604] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 20:53:41,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 20:53:41,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2021-12-17 20:53:41,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824991789] [2021-12-17 20:53:41,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 20:53:41,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 20:53:41,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:53:41,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 20:53:41,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-17 20:53:41,607 INFO L87 Difference]: Start difference. First operand 4355 states and 6298 transitions. Second operand has 14 states, 14 states have (on average 19.785714285714285) internal successors, (277), 14 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:44,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:53:44,898 INFO L93 Difference]: Finished difference Result 25977 states and 35912 transitions. [2021-12-17 20:53:44,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-17 20:53:44,899 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 19.785714285714285) internal successors, (277), 14 states have internal predecessors, (277), 0 states have call successors, (0), 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 98 [2021-12-17 20:53:44,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:53:44,929 INFO L225 Difference]: With dead ends: 25977 [2021-12-17 20:53:44,930 INFO L226 Difference]: Without dead ends: 23947 [2021-12-17 20:53:44,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1848 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-12-17 20:53:44,939 INFO L933 BasicCegarLoop]: 1593 mSDtfsCounter, 15911 mSDsluCounter, 5470 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15911 SdHoareTripleChecker+Valid, 7063 SdHoareTripleChecker+Invalid, 1365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 20:53:44,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15911 Valid, 7063 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 20:53:44,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23947 states. [2021-12-17 20:53:45,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23947 to 15707. [2021-12-17 20:53:45,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15707 states, 15705 states have (on average 1.3468958930276982) internal successors, (21153), 15706 states have internal predecessors, (21153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:45,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15707 states to 15707 states and 21153 transitions. [2021-12-17 20:53:45,681 INFO L78 Accepts]: Start accepts. Automaton has 15707 states and 21153 transitions. Word has length 98 [2021-12-17 20:53:45,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:53:45,681 INFO L470 AbstractCegarLoop]: Abstraction has 15707 states and 21153 transitions. [2021-12-17 20:53:45,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 19.785714285714285) internal successors, (277), 14 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:45,681 INFO L276 IsEmpty]: Start isEmpty. Operand 15707 states and 21153 transitions. [2021-12-17 20:53:45,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-17 20:53:45,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:53:45,683 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:53:45,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 20:53:45,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-17 20:53:45,907 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:53:45,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:53:45,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1125120587, now seen corresponding path program 1 times [2021-12-17 20:53:45,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:53:45,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488023942] [2021-12-17 20:53:45,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:53:45,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:53:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:53:46,032 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:53:46,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:53:46,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488023942] [2021-12-17 20:53:46,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488023942] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 20:53:46,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590401274] [2021-12-17 20:53:46,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:53:46,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 20:53:46,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 20:53:46,036 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 20:53:46,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 20:53:46,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:53:46,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 20:53:46,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 20:53:46,977 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:53:46,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 20:53:47,645 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:53:47,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590401274] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 20:53:47,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 20:53:47,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2021-12-17 20:53:47,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304681395] [2021-12-17 20:53:47,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 20:53:47,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-17 20:53:47,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:53:47,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-17 20:53:47,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-12-17 20:53:47,648 INFO L87 Difference]: Start difference. First operand 15707 states and 21153 transitions. Second operand has 23 states, 23 states have (on average 9.956521739130435) internal successors, (229), 22 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:51,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:53:51,904 INFO L93 Difference]: Finished difference Result 72588 states and 95698 transitions. [2021-12-17 20:53:51,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-17 20:53:51,905 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 9.956521739130435) internal successors, (229), 22 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-12-17 20:53:51,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:53:51,980 INFO L225 Difference]: With dead ends: 72588 [2021-12-17 20:53:51,980 INFO L226 Difference]: Without dead ends: 59691 [2021-12-17 20:53:51,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=464, Invalid=1342, Unknown=0, NotChecked=0, Total=1806 [2021-12-17 20:53:51,996 INFO L933 BasicCegarLoop]: 1557 mSDtfsCounter, 11452 mSDsluCounter, 3777 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11452 SdHoareTripleChecker+Valid, 5334 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 20:53:51,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11452 Valid, 5334 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 20:53:52,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59691 states. [2021-12-17 20:53:54,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59691 to 37413. [2021-12-17 20:53:54,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37413 states, 37411 states have (on average 1.3166448370800032) internal successors, (49257), 37412 states have internal predecessors, (49257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:54,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37413 states to 37413 states and 49257 transitions. [2021-12-17 20:53:54,161 INFO L78 Accepts]: Start accepts. Automaton has 37413 states and 49257 transitions. Word has length 99 [2021-12-17 20:53:54,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:53:54,161 INFO L470 AbstractCegarLoop]: Abstraction has 37413 states and 49257 transitions. [2021-12-17 20:53:54,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.956521739130435) internal successors, (229), 22 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:53:54,161 INFO L276 IsEmpty]: Start isEmpty. Operand 37413 states and 49257 transitions. [2021-12-17 20:53:54,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-17 20:53:54,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:53:54,163 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:53:54,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-17 20:53:54,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-17 20:53:54,374 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:53:54,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:53:54,375 INFO L85 PathProgramCache]: Analyzing trace with hash 110338453, now seen corresponding path program 1 times [2021-12-17 20:53:54,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:53:54,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661495553] [2021-12-17 20:53:54,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:53:54,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:53:54,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:53:54,623 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:53:54,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:53:54,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661495553] [2021-12-17 20:53:54,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661495553] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 20:53:54,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937590478] [2021-12-17 20:53:54,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:53:54,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 20:53:54,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 20:53:54,628 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 20:53:54,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 20:53:54,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:53:54,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 20:53:54,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 20:53:55,522 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:53:55,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 20:53:56,192 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:53:56,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937590478] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 20:53:56,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 20:53:56,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 29 [2021-12-17 20:53:56,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522699680] [2021-12-17 20:53:56,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 20:53:56,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-17 20:53:56,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:53:56,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-17 20:53:56,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2021-12-17 20:53:56,194 INFO L87 Difference]: Start difference. First operand 37413 states and 49257 transitions. Second operand has 30 states, 30 states have (on average 8.966666666666667) internal successors, (269), 29 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)