./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem16_label06.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem16_label06.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 30e99cc503a65b2b00d0d341e953b7b3e491fbf488860704d5a2cfc226394b22 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 12:40:50,026 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 12:40:50,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 12:40:50,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 12:40:50,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 12:40:50,073 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 12:40:50,074 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 12:40:50,075 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 12:40:50,076 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 12:40:50,077 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 12:40:50,077 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 12:40:50,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 12:40:50,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 12:40:50,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 12:40:50,080 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 12:40:50,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 12:40:50,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 12:40:50,094 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 12:40:50,099 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 12:40:50,103 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 12:40:50,105 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 12:40:50,106 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 12:40:50,107 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 12:40:50,108 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 12:40:50,110 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 12:40:50,110 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 12:40:50,110 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 12:40:50,114 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 12:40:50,115 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 12:40:50,115 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 12:40:50,115 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 12:40:50,116 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 12:40:50,117 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 12:40:50,118 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 12:40:50,119 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 12:40:50,119 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 12:40:50,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 12:40:50,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 12:40:50,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 12:40:50,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 12:40:50,121 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 12:40:50,122 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 12:40:50,151 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 12:40:50,151 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 12:40:50,151 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 12:40:50,152 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 12:40:50,153 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 12:40:50,153 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 12:40:50,153 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 12:40:50,153 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 12:40:50,153 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 12:40:50,154 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 12:40:50,154 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 12:40:50,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 12:40:50,154 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 12:40:50,155 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 12:40:50,155 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 12:40:50,155 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 12:40:50,155 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 12:40:50,155 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 12:40:50,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 12:40:50,155 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 12:40:50,156 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 12:40:50,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 12:40:50,156 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 12:40:50,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 12:40:50,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 12:40:50,156 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 12:40:50,156 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 12:40:50,157 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 12:40:50,157 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 12:40:50,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 12:40:50,157 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 12:40:50,157 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 12:40:50,157 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 12:40:50,157 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 12:40:50,158 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 30e99cc503a65b2b00d0d341e953b7b3e491fbf488860704d5a2cfc226394b22 [2021-12-14 12:40:50,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 12:40:50,383 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 12:40:50,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 12:40:50,386 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 12:40:50,387 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 12:40:50,387 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label06.c [2021-12-14 12:40:50,431 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3765f0bab/3820e16b4dee48f19dfd96a992ddd053/FLAG1694ec84d [2021-12-14 12:40:50,909 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 12:40:50,909 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label06.c [2021-12-14 12:40:50,964 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3765f0bab/3820e16b4dee48f19dfd96a992ddd053/FLAG1694ec84d [2021-12-14 12:40:51,489 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3765f0bab/3820e16b4dee48f19dfd96a992ddd053 [2021-12-14 12:40:51,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 12:40:51,491 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 12:40:51,493 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 12:40:51,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 12:40:51,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 12:40:51,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:40:51" (1/1) ... [2021-12-14 12:40:51,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2227b399 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:40:51, skipping insertion in model container [2021-12-14 12:40:51,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:40:51" (1/1) ... [2021-12-14 12:40:51,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 12:40:51,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 12:40:51,726 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label06.c[1375,1388] [2021-12-14 12:40:51,953 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 12:40:51,959 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 12:40:51,968 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label06.c[1375,1388] [2021-12-14 12:40:52,149 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 12:40:52,161 INFO L208 MainTranslator]: Completed translation [2021-12-14 12:40:52,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:40:52 WrapperNode [2021-12-14 12:40:52,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 12:40:52,163 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 12:40:52,163 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 12:40:52,164 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 12:40:52,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:40:52" (1/1) ... [2021-12-14 12:40:52,193 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:40:52" (1/1) ... [2021-12-14 12:40:52,353 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1768 [2021-12-14 12:40:52,354 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 12:40:52,355 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 12:40:52,355 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 12:40:52,355 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 12:40:52,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:40:52" (1/1) ... [2021-12-14 12:40:52,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:40:52" (1/1) ... [2021-12-14 12:40:52,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:40:52" (1/1) ... [2021-12-14 12:40:52,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:40:52" (1/1) ... [2021-12-14 12:40:52,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:40:52" (1/1) ... [2021-12-14 12:40:52,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:40:52" (1/1) ... [2021-12-14 12:40:52,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:40:52" (1/1) ... [2021-12-14 12:40:52,501 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 12:40:52,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 12:40:52,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 12:40:52,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 12:40:52,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:40:52" (1/1) ... [2021-12-14 12:40:52,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 12:40:52,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 12:40:52,544 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) [2021-12-14 12:40:52,599 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 [2021-12-14 12:40:52,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 12:40:52,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 12:40:52,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 12:40:52,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 12:40:52,664 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 12:40:52,666 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 12:40:54,152 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 12:40:54,159 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 12:40:54,159 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 12:40:54,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:40:54 BoogieIcfgContainer [2021-12-14 12:40:54,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 12:40:54,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 12:40:54,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 12:40:54,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 12:40:54,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:40:51" (1/3) ... [2021-12-14 12:40:54,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27dd4aa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:40:54, skipping insertion in model container [2021-12-14 12:40:54,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:40:52" (2/3) ... [2021-12-14 12:40:54,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27dd4aa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:40:54, skipping insertion in model container [2021-12-14 12:40:54,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:40:54" (3/3) ... [2021-12-14 12:40:54,167 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16_label06.c [2021-12-14 12:40:54,170 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 12:40:54,170 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 12:40:54,201 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 12:40:54,206 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 [2021-12-14 12:40:54,206 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 12:40:54,221 INFO L276 IsEmpty]: Start isEmpty. Operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:54,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-14 12:40:54,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:40:54,225 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:40:54,225 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:40:54,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:40:54,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1417350502, now seen corresponding path program 1 times [2021-12-14 12:40:54,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:40:54,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125485513] [2021-12-14 12:40:54,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:40:54,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:40:54,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:40:54,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:40:54,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:40:54,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125485513] [2021-12-14 12:40:54,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125485513] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:40:54,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:40:54,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 12:40:54,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955119825] [2021-12-14 12:40:54,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:40:54,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:40:54,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:40:54,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:40:54,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:40:54,354 INFO L87 Difference]: Start difference. First operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:55,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:40:55,865 INFO L93 Difference]: Finished difference Result 1137 states and 2118 transitions. [2021-12-14 12:40:55,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:40:55,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-12-14 12:40:55,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:40:55,878 INFO L225 Difference]: With dead ends: 1137 [2021-12-14 12:40:55,879 INFO L226 Difference]: Without dead ends: 662 [2021-12-14 12:40:55,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:40:55,884 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 374 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 12:40:55,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 114 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 12:40:55,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-12-14 12:40:55,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2021-12-14 12:40:55,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.7004538577912254) internal successors, (1124), 661 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:55,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1124 transitions. [2021-12-14 12:40:55,930 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1124 transitions. Word has length 10 [2021-12-14 12:40:55,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:40:55,931 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1124 transitions. [2021-12-14 12:40:55,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:55,931 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1124 transitions. [2021-12-14 12:40:55,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-14 12:40:55,933 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:40:55,934 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:40:55,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 12:40:55,934 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:40:55,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:40:55,935 INFO L85 PathProgramCache]: Analyzing trace with hash 591988153, now seen corresponding path program 1 times [2021-12-14 12:40:55,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:40:55,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458411778] [2021-12-14 12:40:55,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:40:55,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:40:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:40:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:40:56,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:40:56,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458411778] [2021-12-14 12:40:56,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458411778] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:40:56,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:40:56,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 12:40:56,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4268557] [2021-12-14 12:40:56,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:40:56,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:40:56,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:40:56,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:40:56,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:40:56,013 INFO L87 Difference]: Start difference. First operand 662 states and 1124 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:57,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:40:57,288 INFO L93 Difference]: Finished difference Result 1980 states and 3367 transitions. [2021-12-14 12:40:57,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:40:57,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-12-14 12:40:57,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:40:57,293 INFO L225 Difference]: With dead ends: 1980 [2021-12-14 12:40:57,293 INFO L226 Difference]: Without dead ends: 1320 [2021-12-14 12:40:57,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:40:57,297 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 343 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-14 12:40:57,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 77 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-14 12:40:57,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2021-12-14 12:40:57,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1320. [2021-12-14 12:40:57,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 1.620166793025019) internal successors, (2137), 1319 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:57,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 2137 transitions. [2021-12-14 12:40:57,335 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 2137 transitions. Word has length 76 [2021-12-14 12:40:57,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:40:57,336 INFO L470 AbstractCegarLoop]: Abstraction has 1320 states and 2137 transitions. [2021-12-14 12:40:57,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:57,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 2137 transitions. [2021-12-14 12:40:57,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-14 12:40:57,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:40:57,337 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:40:57,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 12:40:57,338 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:40:57,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:40:57,338 INFO L85 PathProgramCache]: Analyzing trace with hash -776575973, now seen corresponding path program 1 times [2021-12-14 12:40:57,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:40:57,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804550758] [2021-12-14 12:40:57,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:40:57,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:40:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:40:57,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:40:57,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:40:57,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804550758] [2021-12-14 12:40:57,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804550758] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:40:57,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:40:57,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 12:40:57,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011621447] [2021-12-14 12:40:57,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:40:57,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:40:57,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:40:57,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:40:57,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:40:57,400 INFO L87 Difference]: Start difference. First operand 1320 states and 2137 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:58,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:40:58,345 INFO L93 Difference]: Finished difference Result 3296 states and 5285 transitions. [2021-12-14 12:40:58,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:40:58,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-14 12:40:58,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:40:58,351 INFO L225 Difference]: With dead ends: 3296 [2021-12-14 12:40:58,351 INFO L226 Difference]: Without dead ends: 1978 [2021-12-14 12:40:58,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:40:58,353 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 381 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 12:40:58,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 155 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 12:40:58,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2021-12-14 12:40:58,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1978. [2021-12-14 12:40:58,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 1.3323216995447649) internal successors, (2634), 1977 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:58,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2634 transitions. [2021-12-14 12:40:58,378 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 2634 transitions. Word has length 77 [2021-12-14 12:40:58,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:40:58,378 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 2634 transitions. [2021-12-14 12:40:58,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:58,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 2634 transitions. [2021-12-14 12:40:58,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-14 12:40:58,381 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:40:58,381 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:40:58,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 12:40:58,382 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:40:58,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:40:58,382 INFO L85 PathProgramCache]: Analyzing trace with hash 86018485, now seen corresponding path program 1 times [2021-12-14 12:40:58,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:40:58,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189330673] [2021-12-14 12:40:58,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:40:58,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:40:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:40:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:40:58,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:40:58,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189330673] [2021-12-14 12:40:58,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189330673] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:40:58,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:40:58,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 12:40:58,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316638601] [2021-12-14 12:40:58,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:40:58,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:40:58,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:40:58,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:40:58,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:40:58,488 INFO L87 Difference]: Start difference. First operand 1978 states and 2634 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:59,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:40:59,491 INFO L93 Difference]: Finished difference Result 5928 states and 7897 transitions. [2021-12-14 12:40:59,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:40:59,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 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 169 [2021-12-14 12:40:59,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:40:59,502 INFO L225 Difference]: With dead ends: 5928 [2021-12-14 12:40:59,502 INFO L226 Difference]: Without dead ends: 3952 [2021-12-14 12:40:59,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:40:59,505 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 181 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 12:40:59,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 259 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 12:40:59,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3952 states. [2021-12-14 12:40:59,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 3952. [2021-12-14 12:40:59,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3952 states, 3951 states have (on average 1.216400911161731) internal successors, (4806), 3951 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:59,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3952 states to 3952 states and 4806 transitions. [2021-12-14 12:40:59,551 INFO L78 Accepts]: Start accepts. Automaton has 3952 states and 4806 transitions. Word has length 169 [2021-12-14 12:40:59,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:40:59,551 INFO L470 AbstractCegarLoop]: Abstraction has 3952 states and 4806 transitions. [2021-12-14 12:40:59,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:40:59,552 INFO L276 IsEmpty]: Start isEmpty. Operand 3952 states and 4806 transitions. [2021-12-14 12:40:59,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-12-14 12:40:59,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:40:59,554 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:40:59,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 12:40:59,554 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:40:59,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:40:59,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1806083810, now seen corresponding path program 1 times [2021-12-14 12:40:59,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:40:59,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284044965] [2021-12-14 12:40:59,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:40:59,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:40:59,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:40:59,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:40:59,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:40:59,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284044965] [2021-12-14 12:40:59,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284044965] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:40:59,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:40:59,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:40:59,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441674098] [2021-12-14 12:40:59,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:40:59,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 12:40:59,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:40:59,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 12:40:59,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 12:40:59,815 INFO L87 Difference]: Start difference. First operand 3952 states and 4806 transitions. Second operand has 4 states, 4 states have (on average 63.75) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:01,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:41:01,045 INFO L93 Difference]: Finished difference Result 8269 states and 9989 transitions. [2021-12-14 12:41:01,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 12:41:01,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 63.75) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 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 255 [2021-12-14 12:41:01,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:41:01,056 INFO L225 Difference]: With dead ends: 8269 [2021-12-14 12:41:01,056 INFO L226 Difference]: Without dead ends: 4319 [2021-12-14 12:41:01,060 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 [2021-12-14 12:41:01,061 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 175 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-14 12:41:01,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 371 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-14 12:41:01,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4319 states. [2021-12-14 12:41:01,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4319 to 4281. [2021-12-14 12:41:01,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4281 states, 4280 states have (on average 1.2011682242990653) internal successors, (5141), 4280 states have internal predecessors, (5141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:01,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4281 states to 4281 states and 5141 transitions. [2021-12-14 12:41:01,114 INFO L78 Accepts]: Start accepts. Automaton has 4281 states and 5141 transitions. Word has length 255 [2021-12-14 12:41:01,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:41:01,115 INFO L470 AbstractCegarLoop]: Abstraction has 4281 states and 5141 transitions. [2021-12-14 12:41:01,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.75) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:01,115 INFO L276 IsEmpty]: Start isEmpty. Operand 4281 states and 5141 transitions. [2021-12-14 12:41:01,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2021-12-14 12:41:01,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:41:01,118 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:41:01,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 12:41:01,119 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:41:01,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:41:01,119 INFO L85 PathProgramCache]: Analyzing trace with hash 2015817647, now seen corresponding path program 1 times [2021-12-14 12:41:01,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:41:01,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914909442] [2021-12-14 12:41:01,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:01,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:41:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:41:01,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:41:01,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914909442] [2021-12-14 12:41:01,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914909442] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:41:01,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:41:01,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 12:41:01,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614817725] [2021-12-14 12:41:01,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:41:01,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 12:41:01,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:41:01,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 12:41:01,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-14 12:41:01,282 INFO L87 Difference]: Start difference. First operand 4281 states and 5141 transitions. Second operand has 7 states, 7 states have (on average 48.857142857142854) internal successors, (342), 6 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:02,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:41:02,463 INFO L93 Difference]: Finished difference Result 8090 states and 9792 transitions. [2021-12-14 12:41:02,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 12:41:02,463 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 48.857142857142854) internal successors, (342), 6 states have internal predecessors, (342), 0 states have call successors, (0), 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 342 [2021-12-14 12:41:02,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:41:02,472 INFO L225 Difference]: With dead ends: 8090 [2021-12-14 12:41:02,472 INFO L226 Difference]: Without dead ends: 3952 [2021-12-14 12:41:02,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-14 12:41:02,476 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 371 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1558 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 1892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 1558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 12:41:02,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 290 Invalid, 1892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 1558 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 12:41:02,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3952 states. [2021-12-14 12:41:02,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 3952. [2021-12-14 12:41:02,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3952 states, 3951 states have (on average 1.0802328524424196) internal successors, (4268), 3951 states have internal predecessors, (4268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:02,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3952 states to 3952 states and 4268 transitions. [2021-12-14 12:41:02,514 INFO L78 Accepts]: Start accepts. Automaton has 3952 states and 4268 transitions. Word has length 342 [2021-12-14 12:41:02,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:41:02,515 INFO L470 AbstractCegarLoop]: Abstraction has 3952 states and 4268 transitions. [2021-12-14 12:41:02,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 48.857142857142854) internal successors, (342), 6 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:02,515 INFO L276 IsEmpty]: Start isEmpty. Operand 3952 states and 4268 transitions. [2021-12-14 12:41:02,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2021-12-14 12:41:02,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:41:02,518 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:41:02,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 12:41:02,518 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:41:02,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:41:02,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1027402921, now seen corresponding path program 1 times [2021-12-14 12:41:02,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:41:02,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253233619] [2021-12-14 12:41:02,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:02,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:41:02,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:02,624 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-14 12:41:02,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:41:02,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253233619] [2021-12-14 12:41:02,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253233619] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 12:41:02,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156071340] [2021-12-14 12:41:02,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:02,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 12:41:02,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 12:41:02,626 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) [2021-12-14 12:41:02,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 12:41:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:02,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 12:41:02,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 12:41:03,285 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-14 12:41:03,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 12:41:03,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156071340] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:41:03,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 12:41:03,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-14 12:41:03,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046262442] [2021-12-14 12:41:03,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:41:03,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:41:03,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:41:03,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:41:03,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 12:41:03,287 INFO L87 Difference]: Start difference. First operand 3952 states and 4268 transitions. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:03,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:41:03,994 INFO L93 Difference]: Finished difference Result 9218 states and 10060 transitions. [2021-12-14 12:41:03,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:41:03,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 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 349 [2021-12-14 12:41:03,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:41:04,008 INFO L225 Difference]: With dead ends: 9218 [2021-12-14 12:41:04,008 INFO L226 Difference]: Without dead ends: 5597 [2021-12-14 12:41:04,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 12:41:04,013 INFO L933 BasicCegarLoop]: 400 mSDtfsCounter, 325 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 12:41:04,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 406 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 12:41:04,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5597 states. [2021-12-14 12:41:04,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5597 to 5597. [2021-12-14 12:41:04,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5597 states, 5596 states have (on average 1.0748749106504647) internal successors, (6015), 5596 states have internal predecessors, (6015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:04,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5597 states to 5597 states and 6015 transitions. [2021-12-14 12:41:04,091 INFO L78 Accepts]: Start accepts. Automaton has 5597 states and 6015 transitions. Word has length 349 [2021-12-14 12:41:04,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:41:04,091 INFO L470 AbstractCegarLoop]: Abstraction has 5597 states and 6015 transitions. [2021-12-14 12:41:04,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:04,092 INFO L276 IsEmpty]: Start isEmpty. Operand 5597 states and 6015 transitions. [2021-12-14 12:41:04,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2021-12-14 12:41:04,095 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:41:04,095 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:41:04,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 12:41:04,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 12:41:04,312 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:41:04,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:41:04,313 INFO L85 PathProgramCache]: Analyzing trace with hash 30017336, now seen corresponding path program 1 times [2021-12-14 12:41:04,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:41:04,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42555121] [2021-12-14 12:41:04,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:04,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:41:04,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:04,441 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:41:04,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:41:04,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42555121] [2021-12-14 12:41:04,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42555121] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:41:04,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:41:04,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:41:04,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238216969] [2021-12-14 12:41:04,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:41:04,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:41:04,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:41:04,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:41:04,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:41:04,444 INFO L87 Difference]: Start difference. First operand 5597 states and 6015 transitions. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:05,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:41:05,132 INFO L93 Difference]: Finished difference Result 10863 states and 11697 transitions. [2021-12-14 12:41:05,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:41:05,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 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 404 [2021-12-14 12:41:05,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:41:05,148 INFO L225 Difference]: With dead ends: 10863 [2021-12-14 12:41:05,148 INFO L226 Difference]: Without dead ends: 5597 [2021-12-14 12:41:05,152 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 [2021-12-14 12:41:05,153 INFO L933 BasicCegarLoop]: 412 mSDtfsCounter, 178 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 12:41:05,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 417 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 12:41:05,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5597 states. [2021-12-14 12:41:05,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5597 to 5597. [2021-12-14 12:41:05,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5597 states, 5596 states have (on average 1.0491422444603289) internal successors, (5871), 5596 states have internal predecessors, (5871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:05,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5597 states to 5597 states and 5871 transitions. [2021-12-14 12:41:05,238 INFO L78 Accepts]: Start accepts. Automaton has 5597 states and 5871 transitions. Word has length 404 [2021-12-14 12:41:05,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:41:05,239 INFO L470 AbstractCegarLoop]: Abstraction has 5597 states and 5871 transitions. [2021-12-14 12:41:05,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:05,240 INFO L276 IsEmpty]: Start isEmpty. Operand 5597 states and 5871 transitions. [2021-12-14 12:41:05,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2021-12-14 12:41:05,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:41:05,245 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:41:05,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 12:41:05,246 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:41:05,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:41:05,246 INFO L85 PathProgramCache]: Analyzing trace with hash 2055977998, now seen corresponding path program 1 times [2021-12-14 12:41:05,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:41:05,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547155403] [2021-12-14 12:41:05,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:05,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:41:05,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:05,380 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 249 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:41:05,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:41:05,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547155403] [2021-12-14 12:41:05,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547155403] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:41:05,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:41:05,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:41:05,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441336479] [2021-12-14 12:41:05,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:41:05,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 12:41:05,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:41:05,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 12:41:05,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 12:41:05,387 INFO L87 Difference]: Start difference. First operand 5597 states and 5871 transitions. Second operand has 4 states, 4 states have (on average 122.0) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:06,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:41:06,996 INFO L93 Difference]: Finished difference Result 16456 states and 17283 transitions. [2021-12-14 12:41:06,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 12:41:06,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 122.0) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 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 488 [2021-12-14 12:41:06,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:41:07,021 INFO L225 Difference]: With dead ends: 16456 [2021-12-14 12:41:07,021 INFO L226 Difference]: Without dead ends: 11190 [2021-12-14 12:41:07,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 12:41:07,026 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 186 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 1740 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-14 12:41:07,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 98 Invalid, 1828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1740 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-14 12:41:07,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11190 states. [2021-12-14 12:41:07,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11190 to 9216. [2021-12-14 12:41:07,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9216 states, 9215 states have (on average 1.0493760173629951) internal successors, (9670), 9215 states have internal predecessors, (9670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:07,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9216 states to 9216 states and 9670 transitions. [2021-12-14 12:41:07,122 INFO L78 Accepts]: Start accepts. Automaton has 9216 states and 9670 transitions. Word has length 488 [2021-12-14 12:41:07,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:41:07,123 INFO L470 AbstractCegarLoop]: Abstraction has 9216 states and 9670 transitions. [2021-12-14 12:41:07,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 122.0) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:07,123 INFO L276 IsEmpty]: Start isEmpty. Operand 9216 states and 9670 transitions. [2021-12-14 12:41:07,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2021-12-14 12:41:07,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:41:07,129 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:41:07,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 12:41:07,129 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:41:07,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:41:07,130 INFO L85 PathProgramCache]: Analyzing trace with hash -2065669800, now seen corresponding path program 1 times [2021-12-14 12:41:07,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:41:07,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384338991] [2021-12-14 12:41:07,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:07,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:41:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:07,248 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-14 12:41:07,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:41:07,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384338991] [2021-12-14 12:41:07,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384338991] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:41:07,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:41:07,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:41:07,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198091261] [2021-12-14 12:41:07,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:41:07,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:41:07,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:41:07,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:41:07,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:41:07,250 INFO L87 Difference]: Start difference. First operand 9216 states and 9670 transitions. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:08,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:41:08,063 INFO L93 Difference]: Finished difference Result 21062 states and 22144 transitions. [2021-12-14 12:41:08,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:41:08,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 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 508 [2021-12-14 12:41:08,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:41:08,080 INFO L225 Difference]: With dead ends: 21062 [2021-12-14 12:41:08,080 INFO L226 Difference]: Without dead ends: 12177 [2021-12-14 12:41:08,087 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 [2021-12-14 12:41:08,088 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 190 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 12:41:08,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 38 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 12:41:08,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12177 states. [2021-12-14 12:41:08,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12177 to 11519. [2021-12-14 12:41:08,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11519 states, 11518 states have (on average 1.0467963188053482) internal successors, (12057), 11518 states have internal predecessors, (12057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:08,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11519 states to 11519 states and 12057 transitions. [2021-12-14 12:41:08,198 INFO L78 Accepts]: Start accepts. Automaton has 11519 states and 12057 transitions. Word has length 508 [2021-12-14 12:41:08,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:41:08,199 INFO L470 AbstractCegarLoop]: Abstraction has 11519 states and 12057 transitions. [2021-12-14 12:41:08,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:08,199 INFO L276 IsEmpty]: Start isEmpty. Operand 11519 states and 12057 transitions. [2021-12-14 12:41:08,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2021-12-14 12:41:08,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:41:08,203 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:41:08,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 12:41:08,204 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:41:08,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:41:08,204 INFO L85 PathProgramCache]: Analyzing trace with hash 2055435359, now seen corresponding path program 1 times [2021-12-14 12:41:08,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:41:08,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025646260] [2021-12-14 12:41:08,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:08,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:41:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:08,426 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 332 proven. 156 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 12:41:08,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:41:08,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025646260] [2021-12-14 12:41:08,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025646260] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 12:41:08,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924964999] [2021-12-14 12:41:08,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:08,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 12:41:08,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 12:41:08,428 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) [2021-12-14 12:41:08,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 12:41:08,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:08,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 12:41:08,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 12:41:09,150 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 339 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-12-14 12:41:09,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 12:41:09,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924964999] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:41:09,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 12:41:09,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-14 12:41:09,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277355422] [2021-12-14 12:41:09,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:41:09,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:41:09,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:41:09,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:41:09,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-14 12:41:09,152 INFO L87 Difference]: Start difference. First operand 11519 states and 12057 transitions. Second operand has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:09,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:41:09,940 INFO L93 Difference]: Finished difference Result 25668 states and 26946 transitions. [2021-12-14 12:41:09,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:41:09,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 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 562 [2021-12-14 12:41:09,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:41:09,960 INFO L225 Difference]: With dead ends: 25668 [2021-12-14 12:41:09,960 INFO L226 Difference]: Without dead ends: 14480 [2021-12-14 12:41:09,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 561 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-14 12:41:09,969 INFO L933 BasicCegarLoop]: 436 mSDtfsCounter, 173 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 12:41:09,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 442 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 12:41:09,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14480 states. [2021-12-14 12:41:10,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14480 to 13822. [2021-12-14 12:41:10,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13822 states, 13821 states have (on average 1.0451486867809854) internal successors, (14445), 13821 states have internal predecessors, (14445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:10,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13822 states to 13822 states and 14445 transitions. [2021-12-14 12:41:10,107 INFO L78 Accepts]: Start accepts. Automaton has 13822 states and 14445 transitions. Word has length 562 [2021-12-14 12:41:10,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:41:10,107 INFO L470 AbstractCegarLoop]: Abstraction has 13822 states and 14445 transitions. [2021-12-14 12:41:10,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:10,108 INFO L276 IsEmpty]: Start isEmpty. Operand 13822 states and 14445 transitions. [2021-12-14 12:41:10,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2021-12-14 12:41:10,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:41:10,113 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:41:10,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 12:41:10,329 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,SelfDestructingSolverStorable10 [2021-12-14 12:41:10,330 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:41:10,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:41:10,331 INFO L85 PathProgramCache]: Analyzing trace with hash 345032877, now seen corresponding path program 1 times [2021-12-14 12:41:10,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:41:10,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796086445] [2021-12-14 12:41:10,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:10,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:41:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:10,510 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-12-14 12:41:10,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:41:10,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796086445] [2021-12-14 12:41:10,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796086445] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:41:10,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:41:10,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:41:10,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162323760] [2021-12-14 12:41:10,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:41:10,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:41:10,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:41:10,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:41:10,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:41:10,512 INFO L87 Difference]: Start difference. First operand 13822 states and 14445 transitions. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:11,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:41:11,231 INFO L93 Difference]: Finished difference Result 27313 states and 28557 transitions. [2021-12-14 12:41:11,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:41:11,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 623 [2021-12-14 12:41:11,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:41:11,249 INFO L225 Difference]: With dead ends: 27313 [2021-12-14 12:41:11,249 INFO L226 Difference]: Without dead ends: 13822 [2021-12-14 12:41:11,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:41:11,259 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 337 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 12:41:11,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 427 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 12:41:11,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13822 states. [2021-12-14 12:41:11,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13822 to 12835. [2021-12-14 12:41:11,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12835 states, 12834 states have (on average 1.0424653264765467) internal successors, (13379), 12834 states have internal predecessors, (13379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:11,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12835 states to 12835 states and 13379 transitions. [2021-12-14 12:41:11,430 INFO L78 Accepts]: Start accepts. Automaton has 12835 states and 13379 transitions. Word has length 623 [2021-12-14 12:41:11,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:41:11,430 INFO L470 AbstractCegarLoop]: Abstraction has 12835 states and 13379 transitions. [2021-12-14 12:41:11,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:11,431 INFO L276 IsEmpty]: Start isEmpty. Operand 12835 states and 13379 transitions. [2021-12-14 12:41:11,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 822 [2021-12-14 12:41:11,440 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:41:11,440 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:41:11,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 12:41:11,441 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:41:11,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:41:11,442 INFO L85 PathProgramCache]: Analyzing trace with hash 74923236, now seen corresponding path program 1 times [2021-12-14 12:41:11,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:41:11,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840295221] [2021-12-14 12:41:11,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:11,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:41:11,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:11,693 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 24 proven. 555 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2021-12-14 12:41:11,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:41:11,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840295221] [2021-12-14 12:41:11,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840295221] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 12:41:11,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763405870] [2021-12-14 12:41:11,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:11,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 12:41:11,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 12:41:11,696 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) [2021-12-14 12:41:11,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 12:41:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:11,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 12:41:11,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 12:41:12,818 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 923 trivial. 0 not checked. [2021-12-14 12:41:12,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 12:41:12,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763405870] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:41:12,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 12:41:12,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-14 12:41:12,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335866373] [2021-12-14 12:41:12,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:41:12,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:41:12,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:41:12,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:41:12,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 12:41:12,822 INFO L87 Difference]: Start difference. First operand 12835 states and 13379 transitions. Second operand has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:13,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:41:13,688 INFO L93 Difference]: Finished difference Result 25339 states and 26425 transitions. [2021-12-14 12:41:13,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:41:13,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 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 821 [2021-12-14 12:41:13,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:41:13,703 INFO L225 Difference]: With dead ends: 25339 [2021-12-14 12:41:13,704 INFO L226 Difference]: Without dead ends: 12835 [2021-12-14 12:41:13,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 825 GetRequests, 821 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 12:41:13,712 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 357 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 12:41:13,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 377 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 12:41:13,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12835 states. [2021-12-14 12:41:13,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12835 to 12835. [2021-12-14 12:41:13,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12835 states, 12834 states have (on average 1.0363098020882031) internal successors, (13300), 12834 states have internal predecessors, (13300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:13,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12835 states to 12835 states and 13300 transitions. [2021-12-14 12:41:13,847 INFO L78 Accepts]: Start accepts. Automaton has 12835 states and 13300 transitions. Word has length 821 [2021-12-14 12:41:13,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:41:13,847 INFO L470 AbstractCegarLoop]: Abstraction has 12835 states and 13300 transitions. [2021-12-14 12:41:13,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:13,848 INFO L276 IsEmpty]: Start isEmpty. Operand 12835 states and 13300 transitions. [2021-12-14 12:41:13,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 839 [2021-12-14 12:41:13,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:41:13,859 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:41:13,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 12:41:14,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 12:41:14,077 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:41:14,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:41:14,077 INFO L85 PathProgramCache]: Analyzing trace with hash 510606507, now seen corresponding path program 1 times [2021-12-14 12:41:14,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:41:14,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164816192] [2021-12-14 12:41:14,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:14,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:41:14,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:14,254 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 234 proven. 0 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-12-14 12:41:14,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:41:14,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164816192] [2021-12-14 12:41:14,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164816192] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:41:14,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:41:14,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:41:14,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494936277] [2021-12-14 12:41:14,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:41:14,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:41:14,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:41:14,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:41:14,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:41:14,256 INFO L87 Difference]: Start difference. First operand 12835 states and 13300 transitions. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:15,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:41:15,079 INFO L93 Difference]: Finished difference Result 30274 states and 31426 transitions. [2021-12-14 12:41:15,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:41:15,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 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 838 [2021-12-14 12:41:15,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:41:15,098 INFO L225 Difference]: With dead ends: 30274 [2021-12-14 12:41:15,099 INFO L226 Difference]: Without dead ends: 16454 [2021-12-14 12:41:15,107 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 [2021-12-14 12:41:15,108 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 270 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 12:41:15,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 429 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 12:41:15,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16454 states. [2021-12-14 12:41:15,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16454 to 16125. [2021-12-14 12:41:15,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16125 states, 16124 states have (on average 1.0289630364673779) internal successors, (16591), 16124 states have internal predecessors, (16591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:15,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16125 states to 16125 states and 16591 transitions. [2021-12-14 12:41:15,256 INFO L78 Accepts]: Start accepts. Automaton has 16125 states and 16591 transitions. Word has length 838 [2021-12-14 12:41:15,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:41:15,257 INFO L470 AbstractCegarLoop]: Abstraction has 16125 states and 16591 transitions. [2021-12-14 12:41:15,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:15,257 INFO L276 IsEmpty]: Start isEmpty. Operand 16125 states and 16591 transitions. [2021-12-14 12:41:15,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1095 [2021-12-14 12:41:15,272 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:41:15,273 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:41:15,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 12:41:15,273 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:41:15,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:41:15,274 INFO L85 PathProgramCache]: Analyzing trace with hash 2113802260, now seen corresponding path program 1 times [2021-12-14 12:41:15,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:41:15,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563699892] [2021-12-14 12:41:15,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:15,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:41:15,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:15,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2267 backedges. 1630 proven. 0 refuted. 0 times theorem prover too weak. 637 trivial. 0 not checked. [2021-12-14 12:41:15,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:41:15,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563699892] [2021-12-14 12:41:15,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563699892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:41:15,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:41:15,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:41:15,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396131275] [2021-12-14 12:41:15,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:41:15,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:41:15,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:41:15,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:41:15,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:41:15,587 INFO L87 Difference]: Start difference. First operand 16125 states and 16591 transitions. Second operand has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:16,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:41:16,185 INFO L93 Difference]: Finished difference Result 31919 states and 32849 transitions. [2021-12-14 12:41:16,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:41:16,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 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 1094 [2021-12-14 12:41:16,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:41:16,201 INFO L225 Difference]: With dead ends: 31919 [2021-12-14 12:41:16,201 INFO L226 Difference]: Without dead ends: 16125 [2021-12-14 12:41:16,210 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 [2021-12-14 12:41:16,210 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 220 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 12:41:16,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 431 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 12:41:16,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16125 states. [2021-12-14 12:41:16,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16125 to 14809. [2021-12-14 12:41:16,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14809 states, 14808 states have (on average 1.0231631550513236) internal successors, (15151), 14808 states have internal predecessors, (15151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:16,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14809 states to 14809 states and 15151 transitions. [2021-12-14 12:41:16,421 INFO L78 Accepts]: Start accepts. Automaton has 14809 states and 15151 transitions. Word has length 1094 [2021-12-14 12:41:16,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:41:16,421 INFO L470 AbstractCegarLoop]: Abstraction has 14809 states and 15151 transitions. [2021-12-14 12:41:16,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.33333333333334) internal successors, (610), 3 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:16,421 INFO L276 IsEmpty]: Start isEmpty. Operand 14809 states and 15151 transitions. [2021-12-14 12:41:16,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1096 [2021-12-14 12:41:16,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:41:16,436 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:41:16,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 12:41:16,436 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:41:16,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:41:16,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1813243589, now seen corresponding path program 1 times [2021-12-14 12:41:16,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:41:16,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982255143] [2021-12-14 12:41:16,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:16,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:41:16,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:16,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2273 backedges. 460 proven. 0 refuted. 0 times theorem prover too weak. 1813 trivial. 0 not checked. [2021-12-14 12:41:16,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:41:16,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982255143] [2021-12-14 12:41:16,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982255143] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:41:16,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:41:16,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:41:16,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613098127] [2021-12-14 12:41:16,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:41:16,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:41:16,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:41:16,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:41:16,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:41:16,774 INFO L87 Difference]: Start difference. First operand 14809 states and 15151 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:17,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:41:17,524 INFO L93 Difference]: Finished difference Result 32577 states and 33372 transitions. [2021-12-14 12:41:17,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:41:17,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 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 1095 [2021-12-14 12:41:17,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:41:17,539 INFO L225 Difference]: With dead ends: 32577 [2021-12-14 12:41:17,540 INFO L226 Difference]: Without dead ends: 15796 [2021-12-14 12:41:17,550 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 [2021-12-14 12:41:17,551 INFO L933 BasicCegarLoop]: 408 mSDtfsCounter, 273 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 12:41:17,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 414 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 12:41:17,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15796 states. [2021-12-14 12:41:17,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15796 to 13822. [2021-12-14 12:41:17,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13822 states, 13821 states have (on average 1.0201143187902468) internal successors, (14099), 13821 states have internal predecessors, (14099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:17,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13822 states to 13822 states and 14099 transitions. [2021-12-14 12:41:17,700 INFO L78 Accepts]: Start accepts. Automaton has 13822 states and 14099 transitions. Word has length 1095 [2021-12-14 12:41:17,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:41:17,701 INFO L470 AbstractCegarLoop]: Abstraction has 13822 states and 14099 transitions. [2021-12-14 12:41:17,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:17,702 INFO L276 IsEmpty]: Start isEmpty. Operand 13822 states and 14099 transitions. [2021-12-14 12:41:17,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1351 [2021-12-14 12:41:17,721 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:41:17,722 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:41:17,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 12:41:17,722 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:41:17,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:41:17,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1467850850, now seen corresponding path program 1 times [2021-12-14 12:41:17,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:41:17,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144680778] [2021-12-14 12:41:17,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:17,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:41:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3742 backedges. 2263 proven. 0 refuted. 0 times theorem prover too weak. 1479 trivial. 0 not checked. [2021-12-14 12:41:18,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:41:18,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144680778] [2021-12-14 12:41:18,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144680778] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:41:18,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:41:18,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:41:18,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757976591] [2021-12-14 12:41:18,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:41:18,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:41:18,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:41:18,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:41:18,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:41:18,111 INFO L87 Difference]: Start difference. First operand 13822 states and 14099 transitions. Second operand has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:18,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:41:18,883 INFO L93 Difference]: Finished difference Result 27971 states and 28531 transitions. [2021-12-14 12:41:18,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:41:18,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 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 1350 [2021-12-14 12:41:18,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:41:18,898 INFO L225 Difference]: With dead ends: 27971 [2021-12-14 12:41:18,898 INFO L226 Difference]: Without dead ends: 14480 [2021-12-14 12:41:18,906 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 [2021-12-14 12:41:18,907 INFO L933 BasicCegarLoop]: 427 mSDtfsCounter, 224 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 12:41:18,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 433 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 12:41:18,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14480 states. [2021-12-14 12:41:18,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14480 to 14480. [2021-12-14 12:41:19,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14480 states, 14479 states have (on average 1.0194764831825402) internal successors, (14761), 14479 states have internal predecessors, (14761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:19,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14480 states to 14480 states and 14761 transitions. [2021-12-14 12:41:19,020 INFO L78 Accepts]: Start accepts. Automaton has 14480 states and 14761 transitions. Word has length 1350 [2021-12-14 12:41:19,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:41:19,020 INFO L470 AbstractCegarLoop]: Abstraction has 14480 states and 14761 transitions. [2021-12-14 12:41:19,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:19,021 INFO L276 IsEmpty]: Start isEmpty. Operand 14480 states and 14761 transitions. [2021-12-14 12:41:19,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1389 [2021-12-14 12:41:19,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:41:19,040 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:41:19,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 12:41:19,040 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:41:19,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:41:19,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1766812998, now seen corresponding path program 1 times [2021-12-14 12:41:19,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:41:19,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846502201] [2021-12-14 12:41:19,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:19,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:41:19,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:19,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3503 backedges. 2519 proven. 0 refuted. 0 times theorem prover too weak. 984 trivial. 0 not checked. [2021-12-14 12:41:19,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:41:19,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846502201] [2021-12-14 12:41:19,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846502201] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:41:19,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:41:19,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 12:41:19,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121782989] [2021-12-14 12:41:19,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:41:19,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 12:41:19,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:41:19,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 12:41:19,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-14 12:41:19,432 INFO L87 Difference]: Start difference. First operand 14480 states and 14761 transitions. Second operand has 6 states, 6 states have (on average 122.33333333333333) internal successors, (734), 6 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:20,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:41:20,548 INFO L93 Difference]: Finished difference Result 28741 states and 29301 transitions. [2021-12-14 12:41:20,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 12:41:20,549 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 122.33333333333333) internal successors, (734), 6 states have internal predecessors, (734), 0 states have call successors, (0), 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 1388 [2021-12-14 12:41:20,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:41:20,563 INFO L225 Difference]: With dead ends: 28741 [2021-12-14 12:41:20,564 INFO L226 Difference]: Without dead ends: 14592 [2021-12-14 12:41:20,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 12:41:20,573 INFO L933 BasicCegarLoop]: 428 mSDtfsCounter, 319 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 2107 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 2180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 12:41:20,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 573 Invalid, 2180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2107 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 12:41:20,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14592 states. [2021-12-14 12:41:20,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14592 to 14480. [2021-12-14 12:41:20,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14480 states, 14479 states have (on average 1.0192002210097382) internal successors, (14757), 14479 states have internal predecessors, (14757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:20,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14480 states to 14480 states and 14757 transitions. [2021-12-14 12:41:20,776 INFO L78 Accepts]: Start accepts. Automaton has 14480 states and 14757 transitions. Word has length 1388 [2021-12-14 12:41:20,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:41:20,776 INFO L470 AbstractCegarLoop]: Abstraction has 14480 states and 14757 transitions. [2021-12-14 12:41:20,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 122.33333333333333) internal successors, (734), 6 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:20,777 INFO L276 IsEmpty]: Start isEmpty. Operand 14480 states and 14757 transitions. [2021-12-14 12:41:20,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1403 [2021-12-14 12:41:20,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:41:20,796 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:41:20,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 12:41:20,796 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:41:20,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:41:20,797 INFO L85 PathProgramCache]: Analyzing trace with hash -223106641, now seen corresponding path program 1 times [2021-12-14 12:41:20,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:41:20,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568330153] [2021-12-14 12:41:20,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:20,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:41:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:21,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3409 backedges. 2462 proven. 0 refuted. 0 times theorem prover too weak. 947 trivial. 0 not checked. [2021-12-14 12:41:21,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:41:21,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568330153] [2021-12-14 12:41:21,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568330153] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:41:21,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:41:21,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 12:41:21,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551344822] [2021-12-14 12:41:21,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:41:21,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 12:41:21,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:41:21,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 12:41:21,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 12:41:21,251 INFO L87 Difference]: Start difference. First operand 14480 states and 14757 transitions. Second operand has 5 states, 5 states have (on average 146.6) internal successors, (733), 5 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:22,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:41:22,717 INFO L93 Difference]: Finished difference Result 29628 states and 30188 transitions. [2021-12-14 12:41:22,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 12:41:22,717 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 146.6) internal successors, (733), 5 states have internal predecessors, (733), 0 states have call successors, (0), 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 1402 [2021-12-14 12:41:22,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:41:22,728 INFO L225 Difference]: With dead ends: 29628 [2021-12-14 12:41:22,729 INFO L226 Difference]: Without dead ends: 15150 [2021-12-14 12:41:22,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 12:41:22,737 INFO L933 BasicCegarLoop]: 417 mSDtfsCounter, 599 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 2454 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 2500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 12:41:22,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [599 Valid, 443 Invalid, 2500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2454 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 12:41:22,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15150 states. [2021-12-14 12:41:22,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15150 to 14151. [2021-12-14 12:41:22,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14151 states, 14150 states have (on average 1.0182332155477032) internal successors, (14408), 14150 states have internal predecessors, (14408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:22,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14151 states to 14151 states and 14408 transitions. [2021-12-14 12:41:22,876 INFO L78 Accepts]: Start accepts. Automaton has 14151 states and 14408 transitions. Word has length 1402 [2021-12-14 12:41:22,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:41:22,877 INFO L470 AbstractCegarLoop]: Abstraction has 14151 states and 14408 transitions. [2021-12-14 12:41:22,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.6) internal successors, (733), 5 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:22,877 INFO L276 IsEmpty]: Start isEmpty. Operand 14151 states and 14408 transitions. [2021-12-14 12:41:22,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1405 [2021-12-14 12:41:22,898 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:41:22,899 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:41:22,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 12:41:22,899 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:41:22,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:41:22,900 INFO L85 PathProgramCache]: Analyzing trace with hash 654100295, now seen corresponding path program 1 times [2021-12-14 12:41:22,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:41:22,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762922517] [2021-12-14 12:41:22,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:22,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:41:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3737 backedges. 1001 proven. 0 refuted. 0 times theorem prover too weak. 2736 trivial. 0 not checked. [2021-12-14 12:41:23,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:41:23,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762922517] [2021-12-14 12:41:23,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762922517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:41:23,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:41:23,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:41:23,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509681398] [2021-12-14 12:41:23,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:41:23,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:41:23,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:41:23,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:41:23,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:41:23,250 INFO L87 Difference]: Start difference. First operand 14151 states and 14408 transitions. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:23,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:41:23,943 INFO L93 Difference]: Finished difference Result 28300 states and 28817 transitions. [2021-12-14 12:41:23,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:41:23,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 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 1404 [2021-12-14 12:41:23,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:41:23,954 INFO L225 Difference]: With dead ends: 28300 [2021-12-14 12:41:23,955 INFO L226 Difference]: Without dead ends: 13164 [2021-12-14 12:41:23,962 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 [2021-12-14 12:41:23,962 INFO L933 BasicCegarLoop]: 410 mSDtfsCounter, 168 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 12:41:23,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 416 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 12:41:23,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13164 states. [2021-12-14 12:41:24,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13164 to 12835. [2021-12-14 12:41:24,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12835 states, 12834 states have (on average 1.0132460651394732) internal successors, (13004), 12834 states have internal predecessors, (13004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:24,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12835 states to 12835 states and 13004 transitions. [2021-12-14 12:41:24,193 INFO L78 Accepts]: Start accepts. Automaton has 12835 states and 13004 transitions. Word has length 1404 [2021-12-14 12:41:24,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:41:24,194 INFO L470 AbstractCegarLoop]: Abstraction has 12835 states and 13004 transitions. [2021-12-14 12:41:24,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:24,194 INFO L276 IsEmpty]: Start isEmpty. Operand 12835 states and 13004 transitions. [2021-12-14 12:41:24,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1763 [2021-12-14 12:41:24,216 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:41:24,217 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:41:24,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 12:41:24,218 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:41:24,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:41:24,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1583674694, now seen corresponding path program 1 times [2021-12-14 12:41:24,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:41:24,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749784887] [2021-12-14 12:41:24,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:24,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:41:24,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:24,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5288 backedges. 4199 proven. 6 refuted. 0 times theorem prover too weak. 1083 trivial. 0 not checked. [2021-12-14 12:41:24,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:41:24,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749784887] [2021-12-14 12:41:24,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749784887] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 12:41:24,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525379517] [2021-12-14 12:41:24,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:24,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 12:41:24,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 12:41:24,763 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 12:41:24,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 12:41:25,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:25,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 2045 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 12:41:25,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 12:41:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5288 backedges. 2364 proven. 201 refuted. 0 times theorem prover too weak. 2723 trivial. 0 not checked. [2021-12-14 12:41:29,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 12:41:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5288 backedges. 2364 proven. 201 refuted. 0 times theorem prover too weak. 2723 trivial. 0 not checked. [2021-12-14 12:41:36,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525379517] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 12:41:36,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 12:41:36,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 3] total 10 [2021-12-14 12:41:36,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072201942] [2021-12-14 12:41:36,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 12:41:36,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 12:41:36,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:41:36,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 12:41:36,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-14 12:41:36,669 INFO L87 Difference]: Start difference. First operand 12835 states and 13004 transitions. Second operand has 10 states, 10 states have (on average 225.6) internal successors, (2256), 10 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:40,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:41:40,428 INFO L93 Difference]: Finished difference Result 23450 states and 23767 transitions. [2021-12-14 12:41:40,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 12:41:40,429 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 225.6) internal successors, (2256), 10 states have internal predecessors, (2256), 0 states have call successors, (0), 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 1762 [2021-12-14 12:41:40,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:41:40,439 INFO L225 Difference]: With dead ends: 23450 [2021-12-14 12:41:40,439 INFO L226 Difference]: Without dead ends: 13578 [2021-12-14 12:41:40,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3542 GetRequests, 3527 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-12-14 12:41:40,447 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 935 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 8129 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 8312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 8129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-14 12:41:40,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [935 Valid, 140 Invalid, 8312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 8129 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-14 12:41:40,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13578 states. [2021-12-14 12:41:40,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13578 to 13164. [2021-12-14 12:41:40,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13164 states, 13163 states have (on average 1.0119273721795943) internal successors, (13320), 13163 states have internal predecessors, (13320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:40,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13164 states to 13164 states and 13320 transitions. [2021-12-14 12:41:40,582 INFO L78 Accepts]: Start accepts. Automaton has 13164 states and 13320 transitions. Word has length 1762 [2021-12-14 12:41:40,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:41:40,583 INFO L470 AbstractCegarLoop]: Abstraction has 13164 states and 13320 transitions. [2021-12-14 12:41:40,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 225.6) internal successors, (2256), 10 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:40,583 INFO L276 IsEmpty]: Start isEmpty. Operand 13164 states and 13320 transitions. [2021-12-14 12:41:40,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2188 [2021-12-14 12:41:40,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:41:40,678 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-14 12:41:40,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 12:41:40,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 12:41:40,887 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:41:40,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:41:40,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1984067890, now seen corresponding path program 1 times [2021-12-14 12:41:40,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:41:40,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065576843] [2021-12-14 12:41:40,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:40,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:41:41,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:41,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9210 backedges. 3043 proven. 156 refuted. 0 times theorem prover too weak. 6011 trivial. 0 not checked. [2021-12-14 12:41:41,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:41:41,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065576843] [2021-12-14 12:41:41,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065576843] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 12:41:41,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650080908] [2021-12-14 12:41:41,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:41,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 12:41:41,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 12:41:41,615 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 12:41:41,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 12:41:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:42,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 2547 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 12:41:42,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 12:41:45,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9210 backedges. 3199 proven. 0 refuted. 0 times theorem prover too weak. 6011 trivial. 0 not checked. [2021-12-14 12:41:45,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 12:41:45,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650080908] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:41:45,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 12:41:45,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-14 12:41:45,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666097348] [2021-12-14 12:41:45,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:41:45,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:41:45,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:41:45,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:41:45,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-14 12:41:45,070 INFO L87 Difference]: Start difference. First operand 13164 states and 13320 transitions. Second operand has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:45,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:41:45,779 INFO L93 Difference]: Finished difference Result 25339 states and 25655 transitions. [2021-12-14 12:41:45,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:41:45,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 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 2187 [2021-12-14 12:41:45,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:41:45,793 INFO L225 Difference]: With dead ends: 25339 [2021-12-14 12:41:45,794 INFO L226 Difference]: Without dead ends: 14480 [2021-12-14 12:41:45,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2191 GetRequests, 2186 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-14 12:41:45,802 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 173 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 12:41:45,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 86 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 12:41:45,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14480 states. [2021-12-14 12:41:45,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14480 to 13822. [2021-12-14 12:41:45,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13822 states, 13821 states have (on average 1.0115042326893857) internal successors, (13980), 13821 states have internal predecessors, (13980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:45,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13822 states to 13822 states and 13980 transitions. [2021-12-14 12:41:45,906 INFO L78 Accepts]: Start accepts. Automaton has 13822 states and 13980 transitions. Word has length 2187 [2021-12-14 12:41:45,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:41:45,916 INFO L470 AbstractCegarLoop]: Abstraction has 13822 states and 13980 transitions. [2021-12-14 12:41:45,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:45,917 INFO L276 IsEmpty]: Start isEmpty. Operand 13822 states and 13980 transitions. [2021-12-14 12:41:45,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2296 [2021-12-14 12:41:45,953 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:41:45,954 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:41:45,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 12:41:46,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-14 12:41:46,173 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:41:46,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:41:46,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1358073360, now seen corresponding path program 1 times [2021-12-14 12:41:46,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:41:46,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259386258] [2021-12-14 12:41:46,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:46,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:41:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:46,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9358 backedges. 5401 proven. 1581 refuted. 0 times theorem prover too weak. 2376 trivial. 0 not checked. [2021-12-14 12:41:46,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:41:46,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259386258] [2021-12-14 12:41:46,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259386258] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 12:41:46,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332802565] [2021-12-14 12:41:46,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:46,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 12:41:46,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 12:41:46,793 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 12:41:46,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 12:41:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:47,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 2663 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 12:41:47,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 12:41:49,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9358 backedges. 5377 proven. 0 refuted. 0 times theorem prover too weak. 3981 trivial. 0 not checked. [2021-12-14 12:41:49,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 12:41:49,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332802565] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:41:49,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 12:41:49,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-14 12:41:49,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682254078] [2021-12-14 12:41:49,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:41:49,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:41:49,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:41:49,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:41:49,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 12:41:49,806 INFO L87 Difference]: Start difference. First operand 13822 states and 13980 transitions. Second operand has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:50,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:41:50,451 INFO L93 Difference]: Finished difference Result 25010 states and 25312 transitions. [2021-12-14 12:41:50,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:41:50,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 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 2295 [2021-12-14 12:41:50,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:41:50,463 INFO L225 Difference]: With dead ends: 25010 [2021-12-14 12:41:50,463 INFO L226 Difference]: Without dead ends: 14480 [2021-12-14 12:41:50,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2300 GetRequests, 2296 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 12:41:50,471 INFO L933 BasicCegarLoop]: 418 mSDtfsCounter, 263 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 12:41:50,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 424 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 12:41:50,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14480 states. [2021-12-14 12:41:50,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14480 to 14480. [2021-12-14 12:41:50,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14480 states, 14479 states have (on average 1.011257683541681) internal successors, (14642), 14479 states have internal predecessors, (14642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:50,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14480 states to 14480 states and 14642 transitions. [2021-12-14 12:41:50,581 INFO L78 Accepts]: Start accepts. Automaton has 14480 states and 14642 transitions. Word has length 2295 [2021-12-14 12:41:50,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:41:50,582 INFO L470 AbstractCegarLoop]: Abstraction has 14480 states and 14642 transitions. [2021-12-14 12:41:50,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 12:41:50,582 INFO L276 IsEmpty]: Start isEmpty. Operand 14480 states and 14642 transitions. [2021-12-14 12:41:50,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2509 [2021-12-14 12:41:50,620 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:41:50,621 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-14 12:41:50,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 12:41:50,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 12:41:50,839 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:41:50,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:41:50,840 INFO L85 PathProgramCache]: Analyzing trace with hash 949975587, now seen corresponding path program 1 times [2021-12-14 12:41:50,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:41:50,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049136226] [2021-12-14 12:41:50,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:50,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:41:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:41:51,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10793 backedges. 5238 proven. 1035 refuted. 0 times theorem prover too weak. 4520 trivial. 0 not checked. [2021-12-14 12:41:51,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:41:51,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049136226] [2021-12-14 12:41:51,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049136226] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 12:41:51,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515454792] [2021-12-14 12:41:51,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:41:51,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 12:41:51,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 12:41:51,571 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 12:41:51,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process