./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label39.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem03_label39.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 e75b25accfa51338058ad16425748718d01a5d94bd667d18c22ba63a9d75c3da --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 03:32:36,055 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 03:32:36,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 03:32:36,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 03:32:36,084 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 03:32:36,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 03:32:36,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 03:32:36,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 03:32:36,089 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 03:32:36,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 03:32:36,090 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 03:32:36,091 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 03:32:36,092 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 03:32:36,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 03:32:36,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 03:32:36,095 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 03:32:36,095 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 03:32:36,096 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 03:32:36,098 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 03:32:36,099 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 03:32:36,100 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 03:32:36,109 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 03:32:36,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 03:32:36,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 03:32:36,114 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 03:32:36,120 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 03:32:36,120 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 03:32:36,121 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 03:32:36,122 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 03:32:36,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 03:32:36,123 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 03:32:36,123 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 03:32:36,124 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 03:32:36,125 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 03:32:36,125 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 03:32:36,126 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 03:32:36,126 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 03:32:36,127 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 03:32:36,127 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 03:32:36,128 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 03:32:36,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 03:32:36,129 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 03:32:36,149 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 03:32:36,150 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 03:32:36,150 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 03:32:36,150 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 03:32:36,151 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 03:32:36,151 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 03:32:36,152 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 03:32:36,152 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 03:32:36,152 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 03:32:36,153 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 03:32:36,153 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 03:32:36,153 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 03:32:36,153 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 03:32:36,154 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 03:32:36,154 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 03:32:36,154 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 03:32:36,154 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 03:32:36,154 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 03:32:36,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 03:32:36,155 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 03:32:36,155 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 03:32:36,155 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 03:32:36,155 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 03:32:36,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 03:32:36,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 03:32:36,156 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 03:32:36,156 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 03:32:36,157 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 03:32:36,157 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 03:32:36,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 03:32:36,157 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 03:32:36,157 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 03:32:36,158 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 03:32:36,158 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 03:32:36,158 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e75b25accfa51338058ad16425748718d01a5d94bd667d18c22ba63a9d75c3da [2021-12-17 03:32:36,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 03:32:36,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 03:32:36,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 03:32:36,427 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 03:32:36,427 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 03:32:36,428 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label39.c [2021-12-17 03:32:36,490 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f1263bda/5511a33bd21540309e2c627628301731/FLAG7442aadec [2021-12-17 03:32:37,062 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 03:32:37,064 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label39.c [2021-12-17 03:32:37,082 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f1263bda/5511a33bd21540309e2c627628301731/FLAG7442aadec [2021-12-17 03:32:37,460 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f1263bda/5511a33bd21540309e2c627628301731 [2021-12-17 03:32:37,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 03:32:37,463 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 03:32:37,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 03:32:37,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 03:32:37,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 03:32:37,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:32:37" (1/1) ... [2021-12-17 03:32:37,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@993b440 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:32:37, skipping insertion in model container [2021-12-17 03:32:37,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:32:37" (1/1) ... [2021-12-17 03:32:37,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 03:32:37,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 03:32:38,020 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/Problem03_label39.c[54057,54070] [2021-12-17 03:32:38,057 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 03:32:38,065 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 03:32:38,271 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/Problem03_label39.c[54057,54070] [2021-12-17 03:32:38,285 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 03:32:38,302 INFO L208 MainTranslator]: Completed translation [2021-12-17 03:32:38,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:32:38 WrapperNode [2021-12-17 03:32:38,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 03:32:38,304 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 03:32:38,304 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 03:32:38,304 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 03:32:38,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:32:38" (1/1) ... [2021-12-17 03:32:38,343 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:32:38" (1/1) ... [2021-12-17 03:32:38,418 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-12-17 03:32:38,418 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 03:32:38,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 03:32:38,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 03:32:38,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 03:32:38,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:32:38" (1/1) ... [2021-12-17 03:32:38,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:32:38" (1/1) ... [2021-12-17 03:32:38,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:32:38" (1/1) ... [2021-12-17 03:32:38,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:32:38" (1/1) ... [2021-12-17 03:32:38,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:32:38" (1/1) ... [2021-12-17 03:32:38,505 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:32:38" (1/1) ... [2021-12-17 03:32:38,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:32:38" (1/1) ... [2021-12-17 03:32:38,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 03:32:38,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 03:32:38,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 03:32:38,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 03:32:38,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:32:38" (1/1) ... [2021-12-17 03:32:38,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 03:32:38,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:32:38,605 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 03:32:38,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 03:32:38,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 03:32:38,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 03:32:38,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 03:32:38,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 03:32:38,756 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 03:32:38,757 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 03:32:40,023 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 03:32:40,038 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 03:32:40,039 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 03:32:40,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:32:40 BoogieIcfgContainer [2021-12-17 03:32:40,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 03:32:40,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 03:32:40,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 03:32:40,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 03:32:40,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 03:32:37" (1/3) ... [2021-12-17 03:32:40,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36180287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:32:40, skipping insertion in model container [2021-12-17 03:32:40,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:32:38" (2/3) ... [2021-12-17 03:32:40,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36180287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:32:40, skipping insertion in model container [2021-12-17 03:32:40,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:32:40" (3/3) ... [2021-12-17 03:32:40,049 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label39.c [2021-12-17 03:32:40,054 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 03:32:40,054 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 03:32:40,106 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 03:32:40,114 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 03:32:40,114 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 03:32:40,138 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:40,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-17 03:32:40,158 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:32:40,158 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:32:40,159 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:32:40,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:32:40,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1090968285, now seen corresponding path program 1 times [2021-12-17 03:32:40,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:32:40,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916773151] [2021-12-17 03:32:40,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:32:40,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:32:40,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:32:40,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:32:40,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:32:40,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916773151] [2021-12-17 03:32:40,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916773151] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:32:40,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:32:40,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:32:40,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309840408] [2021-12-17 03:32:40,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:32:40,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:32:40,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:32:40,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:32:40,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:32:40,720 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:41,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:32:41,775 INFO L93 Difference]: Finished difference Result 855 states and 1496 transitions. [2021-12-17 03:32:41,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:32:41,781 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 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 147 [2021-12-17 03:32:41,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:32:41,793 INFO L225 Difference]: With dead ends: 855 [2021-12-17 03:32:41,793 INFO L226 Difference]: Without dead ends: 460 [2021-12-17 03:32:41,797 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 [2021-12-17 03:32:41,800 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 149 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 03:32:41,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 176 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 03:32:41,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-12-17 03:32:41,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 459. [2021-12-17 03:32:41,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 1.5502183406113537) internal successors, (710), 458 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:41,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 710 transitions. [2021-12-17 03:32:41,851 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 710 transitions. Word has length 147 [2021-12-17 03:32:41,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:32:41,852 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 710 transitions. [2021-12-17 03:32:41,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:41,852 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 710 transitions. [2021-12-17 03:32:41,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-17 03:32:41,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:32:41,856 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 03:32:41,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 03:32:41,856 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:32:41,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:32:41,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1670722989, now seen corresponding path program 1 times [2021-12-17 03:32:41,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:32:41,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626160861] [2021-12-17 03:32:41,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:32:41,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:32:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:32:41,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:32:41,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:32:41,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626160861] [2021-12-17 03:32:41,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626160861] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:32:41,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:32:41,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:32:41,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410296171] [2021-12-17 03:32:41,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:32:41,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:32:41,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:32:41,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:32:41,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:32:41,947 INFO L87 Difference]: Start difference. First operand 459 states and 710 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:42,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:32:42,653 INFO L93 Difference]: Finished difference Result 1354 states and 2104 transitions. [2021-12-17 03:32:42,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:32:42,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 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 152 [2021-12-17 03:32:42,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:32:42,669 INFO L225 Difference]: With dead ends: 1354 [2021-12-17 03:32:42,670 INFO L226 Difference]: Without dead ends: 897 [2021-12-17 03:32:42,679 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 [2021-12-17 03:32:42,681 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 265 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:32:42,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 178 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 03:32:42,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-12-17 03:32:42,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 889. [2021-12-17 03:32:42,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 1.472972972972973) internal successors, (1308), 888 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:42,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1308 transitions. [2021-12-17 03:32:42,744 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1308 transitions. Word has length 152 [2021-12-17 03:32:42,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:32:42,747 INFO L470 AbstractCegarLoop]: Abstraction has 889 states and 1308 transitions. [2021-12-17 03:32:42,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:42,748 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1308 transitions. [2021-12-17 03:32:42,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-17 03:32:42,760 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:32:42,760 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] [2021-12-17 03:32:42,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 03:32:42,761 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:32:42,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:32:42,762 INFO L85 PathProgramCache]: Analyzing trace with hash -481274588, now seen corresponding path program 1 times [2021-12-17 03:32:42,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:32:42,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814768314] [2021-12-17 03:32:42,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:32:42,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:32:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:32:42,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:32:42,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:32:42,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814768314] [2021-12-17 03:32:42,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814768314] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:32:42,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:32:42,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:32:42,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286607696] [2021-12-17 03:32:42,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:32:42,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:32:42,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:32:42,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:32:42,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:32:42,829 INFO L87 Difference]: Start difference. First operand 889 states and 1308 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:43,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:32:43,579 INFO L93 Difference]: Finished difference Result 2615 states and 3867 transitions. [2021-12-17 03:32:43,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:32:43,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 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 155 [2021-12-17 03:32:43,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:32:43,588 INFO L225 Difference]: With dead ends: 2615 [2021-12-17 03:32:43,588 INFO L226 Difference]: Without dead ends: 1728 [2021-12-17 03:32:43,590 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 [2021-12-17 03:32:43,591 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:32:43,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 89 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 03:32:43,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2021-12-17 03:32:43,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1704. [2021-12-17 03:32:43,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1704 states, 1703 states have (on average 1.4474456840869054) internal successors, (2465), 1703 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:43,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2465 transitions. [2021-12-17 03:32:43,631 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2465 transitions. Word has length 155 [2021-12-17 03:32:43,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:32:43,632 INFO L470 AbstractCegarLoop]: Abstraction has 1704 states and 2465 transitions. [2021-12-17 03:32:43,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:43,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2465 transitions. [2021-12-17 03:32:43,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-17 03:32:43,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:32:43,637 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:32:43,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 03:32:43,637 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:32:43,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:32:43,638 INFO L85 PathProgramCache]: Analyzing trace with hash -517919847, now seen corresponding path program 1 times [2021-12-17 03:32:43,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:32:43,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879764819] [2021-12-17 03:32:43,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:32:43,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:32:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:32:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 03:32:43,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:32:43,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879764819] [2021-12-17 03:32:43,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879764819] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:32:43,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:32:43,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:32:43,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603648066] [2021-12-17 03:32:43,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:32:43,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:32:43,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:32:43,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:32:43,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:32:43,830 INFO L87 Difference]: Start difference. First operand 1704 states and 2465 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:44,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:32:44,533 INFO L93 Difference]: Finished difference Result 5042 states and 7301 transitions. [2021-12-17 03:32:44,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:32:44,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 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 162 [2021-12-17 03:32:44,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:32:44,547 INFO L225 Difference]: With dead ends: 5042 [2021-12-17 03:32:44,548 INFO L226 Difference]: Without dead ends: 3340 [2021-12-17 03:32:44,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:32:44,553 INFO L933 BasicCegarLoop]: 375 mSDtfsCounter, 116 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:32:44,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 401 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:32:44,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3340 states. [2021-12-17 03:32:44,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3340 to 3337. [2021-12-17 03:32:44,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3337 states, 3336 states have (on average 1.3690047961630696) internal successors, (4567), 3336 states have internal predecessors, (4567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:44,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3337 states to 3337 states and 4567 transitions. [2021-12-17 03:32:44,644 INFO L78 Accepts]: Start accepts. Automaton has 3337 states and 4567 transitions. Word has length 162 [2021-12-17 03:32:44,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:32:44,644 INFO L470 AbstractCegarLoop]: Abstraction has 3337 states and 4567 transitions. [2021-12-17 03:32:44,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:44,645 INFO L276 IsEmpty]: Start isEmpty. Operand 3337 states and 4567 transitions. [2021-12-17 03:32:44,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-12-17 03:32:44,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:32:44,651 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 03:32:44,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 03:32:44,651 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:32:44,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:32:44,652 INFO L85 PathProgramCache]: Analyzing trace with hash -326738375, now seen corresponding path program 1 times [2021-12-17 03:32:44,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:32:44,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552437331] [2021-12-17 03:32:44,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:32:44,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:32:44,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:32:44,725 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 03:32:44,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:32:44,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552437331] [2021-12-17 03:32:44,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552437331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:32:44,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:32:44,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:32:44,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644722439] [2021-12-17 03:32:44,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:32:44,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:32:44,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:32:44,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:32:44,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:32:44,728 INFO L87 Difference]: Start difference. First operand 3337 states and 4567 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:45,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:32:45,430 INFO L93 Difference]: Finished difference Result 8328 states and 11372 transitions. [2021-12-17 03:32:45,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:32:45,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 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 171 [2021-12-17 03:32:45,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:32:45,448 INFO L225 Difference]: With dead ends: 8328 [2021-12-17 03:32:45,448 INFO L226 Difference]: Without dead ends: 4993 [2021-12-17 03:32:45,452 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 [2021-12-17 03:32:45,453 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 219 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:32:45,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 180 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:32:45,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4993 states. [2021-12-17 03:32:45,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4993 to 4981. [2021-12-17 03:32:45,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4981 states, 4980 states have (on average 1.35) internal successors, (6723), 4980 states have internal predecessors, (6723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:45,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4981 states to 4981 states and 6723 transitions. [2021-12-17 03:32:45,567 INFO L78 Accepts]: Start accepts. Automaton has 4981 states and 6723 transitions. Word has length 171 [2021-12-17 03:32:45,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:32:45,568 INFO L470 AbstractCegarLoop]: Abstraction has 4981 states and 6723 transitions. [2021-12-17 03:32:45,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:45,568 INFO L276 IsEmpty]: Start isEmpty. Operand 4981 states and 6723 transitions. [2021-12-17 03:32:45,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-12-17 03:32:45,576 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:32:45,577 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:32:45,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 03:32:45,577 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:32:45,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:32:45,578 INFO L85 PathProgramCache]: Analyzing trace with hash -187033577, now seen corresponding path program 1 times [2021-12-17 03:32:45,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:32:45,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566699386] [2021-12-17 03:32:45,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:32:45,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:32:45,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:32:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 03:32:45,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:32:45,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566699386] [2021-12-17 03:32:45,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566699386] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:32:45,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:32:45,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:32:45,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856614845] [2021-12-17 03:32:45,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:32:45,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:32:45,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:32:45,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:32:45,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:32:45,625 INFO L87 Difference]: Start difference. First operand 4981 states and 6723 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:46,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:32:46,013 INFO L93 Difference]: Finished difference Result 9919 states and 13388 transitions. [2021-12-17 03:32:46,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:32:46,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 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 174 [2021-12-17 03:32:46,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:32:46,051 INFO L225 Difference]: With dead ends: 9919 [2021-12-17 03:32:46,051 INFO L226 Difference]: Without dead ends: 4940 [2021-12-17 03:32:46,057 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 [2021-12-17 03:32:46,060 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 329 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:32:46,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 03:32:46,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4940 states. [2021-12-17 03:32:46,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4940 to 4940. [2021-12-17 03:32:46,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4940 states, 4939 states have (on average 1.313018829722616) internal successors, (6485), 4939 states have internal predecessors, (6485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:46,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4940 states to 4940 states and 6485 transitions. [2021-12-17 03:32:46,155 INFO L78 Accepts]: Start accepts. Automaton has 4940 states and 6485 transitions. Word has length 174 [2021-12-17 03:32:46,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:32:46,155 INFO L470 AbstractCegarLoop]: Abstraction has 4940 states and 6485 transitions. [2021-12-17 03:32:46,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:46,156 INFO L276 IsEmpty]: Start isEmpty. Operand 4940 states and 6485 transitions. [2021-12-17 03:32:46,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-17 03:32:46,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:32:46,164 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 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] [2021-12-17 03:32:46,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 03:32:46,164 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:32:46,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:32:46,164 INFO L85 PathProgramCache]: Analyzing trace with hash -134534967, now seen corresponding path program 1 times [2021-12-17 03:32:46,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:32:46,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118499383] [2021-12-17 03:32:46,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:32:46,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:32:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:32:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 03:32:46,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:32:46,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118499383] [2021-12-17 03:32:46,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118499383] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:32:46,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837011899] [2021-12-17 03:32:46,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:32:46,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:32:46,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:32:46,231 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:32:46,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 03:32:46,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:32:46,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:32:46,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:32:46,710 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-17 03:32:46,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:32:46,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837011899] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:32:46,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:32:46,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-17 03:32:46,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099466322] [2021-12-17 03:32:46,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:32:46,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:32:46,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:32:46,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:32:46,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:32:46,716 INFO L87 Difference]: Start difference. First operand 4940 states and 6485 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:46,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:32:46,968 INFO L93 Difference]: Finished difference Result 13171 states and 17350 transitions. [2021-12-17 03:32:46,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:32:46,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 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 176 [2021-12-17 03:32:46,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:32:47,000 INFO L225 Difference]: With dead ends: 13171 [2021-12-17 03:32:47,000 INFO L226 Difference]: Without dead ends: 8233 [2021-12-17 03:32:47,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:32:47,008 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 319 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:32:47,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 550 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 03:32:47,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8233 states. [2021-12-17 03:32:47,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8233 to 8231. [2021-12-17 03:32:47,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8231 states, 8230 states have (on average 1.3139732685297691) internal successors, (10814), 8230 states have internal predecessors, (10814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:47,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8231 states to 8231 states and 10814 transitions. [2021-12-17 03:32:47,168 INFO L78 Accepts]: Start accepts. Automaton has 8231 states and 10814 transitions. Word has length 176 [2021-12-17 03:32:47,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:32:47,169 INFO L470 AbstractCegarLoop]: Abstraction has 8231 states and 10814 transitions. [2021-12-17 03:32:47,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:47,169 INFO L276 IsEmpty]: Start isEmpty. Operand 8231 states and 10814 transitions. [2021-12-17 03:32:47,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-17 03:32:47,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:32:47,181 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 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] [2021-12-17 03:32:47,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 03:32:47,399 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 [2021-12-17 03:32:47,400 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:32:47,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:32:47,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1444061302, now seen corresponding path program 1 times [2021-12-17 03:32:47,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:32:47,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231501319] [2021-12-17 03:32:47,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:32:47,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:32:47,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:32:47,503 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 03:32:47,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:32:47,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231501319] [2021-12-17 03:32:47,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231501319] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:32:47,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:32:47,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:32:47,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17362330] [2021-12-17 03:32:47,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:32:47,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:32:47,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:32:47,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:32:47,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:32:47,506 INFO L87 Difference]: Start difference. First operand 8231 states and 10814 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:48,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:32:48,232 INFO L93 Difference]: Finished difference Result 23774 states and 31302 transitions. [2021-12-17 03:32:48,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:32:48,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-12-17 03:32:48,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:32:48,276 INFO L225 Difference]: With dead ends: 23774 [2021-12-17 03:32:48,276 INFO L226 Difference]: Without dead ends: 15545 [2021-12-17 03:32:48,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:32:48,292 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 202 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:32:48,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 378 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:32:48,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15545 states. [2021-12-17 03:32:48,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15545 to 14727. [2021-12-17 03:32:48,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14727 states, 14726 states have (on average 1.213092489474399) internal successors, (17864), 14726 states have internal predecessors, (17864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:48,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14727 states to 14727 states and 17864 transitions. [2021-12-17 03:32:48,645 INFO L78 Accepts]: Start accepts. Automaton has 14727 states and 17864 transitions. Word has length 177 [2021-12-17 03:32:48,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:32:48,645 INFO L470 AbstractCegarLoop]: Abstraction has 14727 states and 17864 transitions. [2021-12-17 03:32:48,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:48,646 INFO L276 IsEmpty]: Start isEmpty. Operand 14727 states and 17864 transitions. [2021-12-17 03:32:48,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-12-17 03:32:48,666 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:32:48,666 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:32:48,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 03:32:48,667 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:32:48,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:32:48,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1239845976, now seen corresponding path program 1 times [2021-12-17 03:32:48,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:32:48,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815979421] [2021-12-17 03:32:48,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:32:48,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:32:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:32:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-17 03:32:48,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:32:48,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815979421] [2021-12-17 03:32:48,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815979421] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:32:48,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:32:48,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:32:48,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784427048] [2021-12-17 03:32:48,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:32:48,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:32:48,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:32:48,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:32:48,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:32:48,766 INFO L87 Difference]: Start difference. First operand 14727 states and 17864 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:49,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:32:49,562 INFO L93 Difference]: Finished difference Result 36760 states and 45349 transitions. [2021-12-17 03:32:49,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:32:49,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 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 189 [2021-12-17 03:32:49,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:32:49,677 INFO L225 Difference]: With dead ends: 36760 [2021-12-17 03:32:49,677 INFO L226 Difference]: Without dead ends: 22035 [2021-12-17 03:32:49,695 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 [2021-12-17 03:32:49,696 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 203 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:32:49,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 148 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:32:49,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22035 states. [2021-12-17 03:32:49,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22035 to 20411. [2021-12-17 03:32:49,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20411 states, 20410 states have (on average 1.168936795688388) internal successors, (23858), 20410 states have internal predecessors, (23858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:49,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20411 states to 20411 states and 23858 transitions. [2021-12-17 03:32:49,996 INFO L78 Accepts]: Start accepts. Automaton has 20411 states and 23858 transitions. Word has length 189 [2021-12-17 03:32:49,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:32:49,996 INFO L470 AbstractCegarLoop]: Abstraction has 20411 states and 23858 transitions. [2021-12-17 03:32:49,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:49,997 INFO L276 IsEmpty]: Start isEmpty. Operand 20411 states and 23858 transitions. [2021-12-17 03:32:50,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-12-17 03:32:50,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:32:50,020 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 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] [2021-12-17 03:32:50,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 03:32:50,021 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:32:50,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:32:50,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1275150247, now seen corresponding path program 1 times [2021-12-17 03:32:50,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:32:50,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896368294] [2021-12-17 03:32:50,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:32:50,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:32:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:32:50,185 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-17 03:32:50,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:32:50,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896368294] [2021-12-17 03:32:50,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896368294] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:32:50,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:32:50,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:32:50,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385072378] [2021-12-17 03:32:50,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:32:50,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:32:50,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:32:50,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:32:50,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:32:50,188 INFO L87 Difference]: Start difference. First operand 20411 states and 23858 transitions. Second operand has 4 states, 4 states have (on average 49.75) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:51,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:32:51,001 INFO L93 Difference]: Finished difference Result 41652 states and 48614 transitions. [2021-12-17 03:32:51,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:32:51,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.75) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 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 237 [2021-12-17 03:32:51,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:32:51,044 INFO L225 Difference]: With dead ends: 41652 [2021-12-17 03:32:51,044 INFO L226 Difference]: Without dead ends: 21243 [2021-12-17 03:32:51,071 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 [2021-12-17 03:32:51,072 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 759 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:32:51,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [759 Valid, 43 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 03:32:51,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21243 states. [2021-12-17 03:32:51,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21243 to 20005. [2021-12-17 03:32:51,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20005 states, 20004 states have (on average 1.1587682463507298) internal successors, (23180), 20004 states have internal predecessors, (23180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:51,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20005 states to 20005 states and 23180 transitions. [2021-12-17 03:32:51,388 INFO L78 Accepts]: Start accepts. Automaton has 20005 states and 23180 transitions. Word has length 237 [2021-12-17 03:32:51,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:32:51,388 INFO L470 AbstractCegarLoop]: Abstraction has 20005 states and 23180 transitions. [2021-12-17 03:32:51,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.75) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:51,389 INFO L276 IsEmpty]: Start isEmpty. Operand 20005 states and 23180 transitions. [2021-12-17 03:32:51,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-12-17 03:32:51,411 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:32:51,411 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-17 03:32:51,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 03:32:51,412 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:32:51,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:32:51,413 INFO L85 PathProgramCache]: Analyzing trace with hash 405573062, now seen corresponding path program 1 times [2021-12-17 03:32:51,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:32:51,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866773634] [2021-12-17 03:32:51,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:32:51,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:32:51,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:32:51,584 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-17 03:32:51,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:32:51,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866773634] [2021-12-17 03:32:51,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866773634] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:32:51,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:32:51,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 03:32:51,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370464922] [2021-12-17 03:32:51,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:32:51,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:32:51,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:32:51,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:32:51,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:32:51,587 INFO L87 Difference]: Start difference. First operand 20005 states and 23180 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 2 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:52,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:32:52,280 INFO L93 Difference]: Finished difference Result 44705 states and 51902 transitions. [2021-12-17 03:32:52,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:32:52,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 2 states have internal predecessors, (224), 0 states have call successors, (0), 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 249 [2021-12-17 03:32:52,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:32:52,331 INFO L225 Difference]: With dead ends: 44705 [2021-12-17 03:32:52,332 INFO L226 Difference]: Without dead ends: 24702 [2021-12-17 03:32:52,350 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 [2021-12-17 03:32:52,351 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 149 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:32:52,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 124 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:32:52,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24702 states. [2021-12-17 03:32:52,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24702 to 21223. [2021-12-17 03:32:52,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21223 states, 21222 states have (on average 1.1605409480727547) internal successors, (24629), 21222 states have internal predecessors, (24629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:52,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21223 states to 21223 states and 24629 transitions. [2021-12-17 03:32:52,681 INFO L78 Accepts]: Start accepts. Automaton has 21223 states and 24629 transitions. Word has length 249 [2021-12-17 03:32:52,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:32:52,681 INFO L470 AbstractCegarLoop]: Abstraction has 21223 states and 24629 transitions. [2021-12-17 03:32:52,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 2 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:52,682 INFO L276 IsEmpty]: Start isEmpty. Operand 21223 states and 24629 transitions. [2021-12-17 03:32:52,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-12-17 03:32:52,705 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:32:52,705 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:32:52,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 03:32:52,706 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:32:52,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:32:52,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1037109119, now seen corresponding path program 1 times [2021-12-17 03:32:52,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:32:52,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456859758] [2021-12-17 03:32:52,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:32:52,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:32:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:32:52,868 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:32:52,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:32:52,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456859758] [2021-12-17 03:32:52,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456859758] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:32:52,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:32:52,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:32:52,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311612093] [2021-12-17 03:32:52,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:32:52,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:32:52,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:32:52,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:32:52,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:32:52,871 INFO L87 Difference]: Start difference. First operand 21223 states and 24629 transitions. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:53,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:32:53,538 INFO L93 Difference]: Finished difference Result 41403 states and 48069 transitions. [2021-12-17 03:32:53,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:32:53,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 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 258 [2021-12-17 03:32:53,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:32:53,579 INFO L225 Difference]: With dead ends: 41403 [2021-12-17 03:32:53,580 INFO L226 Difference]: Without dead ends: 20588 [2021-12-17 03:32:53,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:32:53,598 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 245 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:32:53,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 322 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:32:53,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20588 states. [2021-12-17 03:32:53,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20588 to 20586. [2021-12-17 03:32:53,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20586 states, 20585 states have (on average 1.117852805440855) internal successors, (23011), 20585 states have internal predecessors, (23011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:53,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20586 states to 20586 states and 23011 transitions. [2021-12-17 03:32:53,903 INFO L78 Accepts]: Start accepts. Automaton has 20586 states and 23011 transitions. Word has length 258 [2021-12-17 03:32:53,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:32:53,904 INFO L470 AbstractCegarLoop]: Abstraction has 20586 states and 23011 transitions. [2021-12-17 03:32:53,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:53,904 INFO L276 IsEmpty]: Start isEmpty. Operand 20586 states and 23011 transitions. [2021-12-17 03:32:53,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-12-17 03:32:53,919 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:32:53,919 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 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] [2021-12-17 03:32:53,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 03:32:53,920 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:32:53,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:32:53,921 INFO L85 PathProgramCache]: Analyzing trace with hash 958878625, now seen corresponding path program 1 times [2021-12-17 03:32:53,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:32:53,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836335326] [2021-12-17 03:32:53,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:32:53,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:32:54,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:32:54,106 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-17 03:32:54,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:32:54,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836335326] [2021-12-17 03:32:54,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836335326] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:32:54,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671529732] [2021-12-17 03:32:54,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:32:54,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:32:54,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:32:54,109 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:32:54,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 03:32:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:32:54,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:32:54,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:32:54,730 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-12-17 03:32:54,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:32:54,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671529732] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:32:54,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:32:54,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:32:54,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387522910] [2021-12-17 03:32:54,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:32:54,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:32:54,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:32:54,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:32:54,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:32:54,732 INFO L87 Difference]: Start difference. First operand 20586 states and 23011 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:55,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:32:55,489 INFO L93 Difference]: Finished difference Result 52159 states and 58281 transitions. [2021-12-17 03:32:55,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:32:55,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 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 260 [2021-12-17 03:32:55,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:32:55,540 INFO L225 Difference]: With dead ends: 52159 [2021-12-17 03:32:55,540 INFO L226 Difference]: Without dead ends: 31981 [2021-12-17 03:32:55,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:32:55,563 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 84 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:32:55,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 173 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:32:55,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31981 states. [2021-12-17 03:32:55,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31981 to 23635. [2021-12-17 03:32:55,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23635 states, 23634 states have (on average 1.1248201743251247) internal successors, (26584), 23634 states have internal predecessors, (26584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:56,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23635 states to 23635 states and 26584 transitions. [2021-12-17 03:32:56,022 INFO L78 Accepts]: Start accepts. Automaton has 23635 states and 26584 transitions. Word has length 260 [2021-12-17 03:32:56,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:32:56,022 INFO L470 AbstractCegarLoop]: Abstraction has 23635 states and 26584 transitions. [2021-12-17 03:32:56,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:56,023 INFO L276 IsEmpty]: Start isEmpty. Operand 23635 states and 26584 transitions. [2021-12-17 03:32:56,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-12-17 03:32:56,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:32:56,039 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 03:32:56,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 03:32:56,254 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,SelfDestructingSolverStorable12 [2021-12-17 03:32:56,255 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:32:56,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:32:56,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1116755414, now seen corresponding path program 1 times [2021-12-17 03:32:56,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:32:56,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076158784] [2021-12-17 03:32:56,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:32:56,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:32:56,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:32:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 133 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 03:32:56,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:32:56,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076158784] [2021-12-17 03:32:56,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076158784] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:32:56,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432047170] [2021-12-17 03:32:56,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:32:56,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:32:56,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:32:56,432 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:32:56,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 03:32:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:32:56,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:32:56,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:32:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-17 03:32:57,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:32:57,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432047170] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:32:57,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:32:57,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:32:57,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001965978] [2021-12-17 03:32:57,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:32:57,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:32:57,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:32:57,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:32:57,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:32:57,046 INFO L87 Difference]: Start difference. First operand 23635 states and 26584 transitions. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:57,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:32:57,716 INFO L93 Difference]: Finished difference Result 46866 states and 52721 transitions. [2021-12-17 03:32:57,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:32:57,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 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 270 [2021-12-17 03:32:57,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:32:57,745 INFO L225 Difference]: With dead ends: 46866 [2021-12-17 03:32:57,745 INFO L226 Difference]: Without dead ends: 23233 [2021-12-17 03:32:57,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:32:57,765 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 116 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:32:57,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 291 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:32:57,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23233 states. [2021-12-17 03:32:57,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23233 to 22415. [2021-12-17 03:32:58,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22415 states, 22414 states have (on average 1.1135451057374854) internal successors, (24959), 22414 states have internal predecessors, (24959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:58,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22415 states to 22415 states and 24959 transitions. [2021-12-17 03:32:58,167 INFO L78 Accepts]: Start accepts. Automaton has 22415 states and 24959 transitions. Word has length 270 [2021-12-17 03:32:58,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:32:58,168 INFO L470 AbstractCegarLoop]: Abstraction has 22415 states and 24959 transitions. [2021-12-17 03:32:58,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:58,168 INFO L276 IsEmpty]: Start isEmpty. Operand 22415 states and 24959 transitions. [2021-12-17 03:32:58,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-12-17 03:32:58,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:32:58,184 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:32:58,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 03:32:58,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:32:58,385 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:32:58,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:32:58,386 INFO L85 PathProgramCache]: Analyzing trace with hash -148697325, now seen corresponding path program 1 times [2021-12-17 03:32:58,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:32:58,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070350515] [2021-12-17 03:32:58,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:32:58,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:32:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:32:58,684 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 03:32:58,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:32:58,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070350515] [2021-12-17 03:32:58,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070350515] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:32:58,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:32:58,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:32:58,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921236359] [2021-12-17 03:32:58,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:32:58,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:32:58,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:32:58,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:32:58,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:32:58,687 INFO L87 Difference]: Start difference. First operand 22415 states and 24959 transitions. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:32:59,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:32:59,575 INFO L93 Difference]: Finished difference Result 65393 states and 72823 transitions. [2021-12-17 03:32:59,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:32:59,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 298 [2021-12-17 03:32:59,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:32:59,624 INFO L225 Difference]: With dead ends: 65393 [2021-12-17 03:32:59,624 INFO L226 Difference]: Without dead ends: 42980 [2021-12-17 03:32:59,651 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 [2021-12-17 03:32:59,652 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 775 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:32:59,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 48 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 03:32:59,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42980 states. [2021-12-17 03:33:00,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42980 to 42976. [2021-12-17 03:33:00,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42976 states, 42975 states have (on average 1.1134380453752182) internal successors, (47850), 42975 states have internal predecessors, (47850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:00,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42976 states to 42976 states and 47850 transitions. [2021-12-17 03:33:00,312 INFO L78 Accepts]: Start accepts. Automaton has 42976 states and 47850 transitions. Word has length 298 [2021-12-17 03:33:00,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:33:00,313 INFO L470 AbstractCegarLoop]: Abstraction has 42976 states and 47850 transitions. [2021-12-17 03:33:00,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:00,313 INFO L276 IsEmpty]: Start isEmpty. Operand 42976 states and 47850 transitions. [2021-12-17 03:33:00,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-12-17 03:33:00,349 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:33:00,349 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:33:00,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 03:33:00,349 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:33:00,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:33:00,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1244484815, now seen corresponding path program 1 times [2021-12-17 03:33:00,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:33:00,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604126418] [2021-12-17 03:33:00,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:00,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:33:00,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 213 proven. 11 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-12-17 03:33:00,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:33:00,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604126418] [2021-12-17 03:33:00,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604126418] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:33:00,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712722087] [2021-12-17 03:33:00,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:00,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:33:00,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:33:00,494 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) [2021-12-17 03:33:00,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 03:33:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:00,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:33:00,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:33:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-17 03:33:01,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:33:01,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712722087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:33:01,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:33:01,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:33:01,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206055235] [2021-12-17 03:33:01,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:33:01,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:33:01,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:33:01,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:33:01,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:33:01,065 INFO L87 Difference]: Start difference. First operand 42976 states and 47850 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:01,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:33:01,876 INFO L93 Difference]: Finished difference Result 85960 states and 95712 transitions. [2021-12-17 03:33:01,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:33:01,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 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 328 [2021-12-17 03:33:01,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:33:01,932 INFO L225 Difference]: With dead ends: 85960 [2021-12-17 03:33:01,932 INFO L226 Difference]: Without dead ends: 42986 [2021-12-17 03:33:01,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:33:01,964 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 228 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:33:01,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 122 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:33:02,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42986 states. [2021-12-17 03:33:02,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42986 to 42976. [2021-12-17 03:33:02,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42976 states, 42975 states have (on average 1.0983362420011635) internal successors, (47201), 42975 states have internal predecessors, (47201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:02,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42976 states to 42976 states and 47201 transitions. [2021-12-17 03:33:02,636 INFO L78 Accepts]: Start accepts. Automaton has 42976 states and 47201 transitions. Word has length 328 [2021-12-17 03:33:02,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:33:02,637 INFO L470 AbstractCegarLoop]: Abstraction has 42976 states and 47201 transitions. [2021-12-17 03:33:02,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:02,637 INFO L276 IsEmpty]: Start isEmpty. Operand 42976 states and 47201 transitions. [2021-12-17 03:33:02,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2021-12-17 03:33:02,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:33:02,677 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 03:33:02,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 03:33:02,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-17 03:33:02,888 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:33:02,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:33:02,889 INFO L85 PathProgramCache]: Analyzing trace with hash 137607916, now seen corresponding path program 1 times [2021-12-17 03:33:02,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:33:02,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446374141] [2021-12-17 03:33:02,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:02,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:33:02,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 249 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 03:33:03,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:33:03,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446374141] [2021-12-17 03:33:03,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446374141] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:33:03,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:33:03,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:33:03,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607848735] [2021-12-17 03:33:03,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:33:03,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:33:03,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:33:03,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:33:03,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:33:03,049 INFO L87 Difference]: Start difference. First operand 42976 states and 47201 transitions. Second operand has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:03,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:33:03,885 INFO L93 Difference]: Finished difference Result 81671 states and 89536 transitions. [2021-12-17 03:33:03,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:33:03,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 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 335 [2021-12-17 03:33:03,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:33:03,932 INFO L225 Difference]: With dead ends: 81671 [2021-12-17 03:33:03,932 INFO L226 Difference]: Without dead ends: 38697 [2021-12-17 03:33:03,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:33:03,957 INFO L933 BasicCegarLoop]: 295 mSDtfsCounter, 225 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:33:03,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 315 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:33:03,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38697 states. [2021-12-17 03:33:04,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38697 to 37871. [2021-12-17 03:33:04,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37871 states, 37870 states have (on average 1.08415632426723) internal successors, (41057), 37870 states have internal predecessors, (41057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:04,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37871 states to 37871 states and 41057 transitions. [2021-12-17 03:33:04,462 INFO L78 Accepts]: Start accepts. Automaton has 37871 states and 41057 transitions. Word has length 335 [2021-12-17 03:33:04,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:33:04,462 INFO L470 AbstractCegarLoop]: Abstraction has 37871 states and 41057 transitions. [2021-12-17 03:33:04,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:04,462 INFO L276 IsEmpty]: Start isEmpty. Operand 37871 states and 41057 transitions. [2021-12-17 03:33:04,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2021-12-17 03:33:04,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:33:04,491 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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, 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, 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] [2021-12-17 03:33:04,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 03:33:04,492 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:33:04,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:33:04,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1720407919, now seen corresponding path program 1 times [2021-12-17 03:33:04,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:33:04,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607950916] [2021-12-17 03:33:04,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:04,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:33:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:04,602 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 78 proven. 12 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-12-17 03:33:04,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:33:04,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607950916] [2021-12-17 03:33:04,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607950916] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:33:04,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833427337] [2021-12-17 03:33:04,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:04,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:33:04,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:33:04,608 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) [2021-12-17 03:33:04,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 03:33:04,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:04,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:33:04,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:33:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-12-17 03:33:05,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:33:05,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833427337] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:33:05,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:33:05,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:33:05,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202546991] [2021-12-17 03:33:05,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:33:05,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:33:05,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:33:05,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:33:05,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:33:05,422 INFO L87 Difference]: Start difference. First operand 37871 states and 41057 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:05,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:33:05,957 INFO L93 Difference]: Finished difference Result 105437 states and 114346 transitions. [2021-12-17 03:33:05,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:33:05,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 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 370 [2021-12-17 03:33:05,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:33:06,043 INFO L225 Difference]: With dead ends: 105437 [2021-12-17 03:33:06,043 INFO L226 Difference]: Without dead ends: 67568 [2021-12-17 03:33:06,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:33:06,079 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 235 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:33:06,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 801 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 03:33:06,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67568 states. [2021-12-17 03:33:06,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67568 to 67562. [2021-12-17 03:33:06,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67562 states, 67561 states have (on average 1.0765826438329806) internal successors, (72735), 67561 states have internal predecessors, (72735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:06,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67562 states to 67562 states and 72735 transitions. [2021-12-17 03:33:06,929 INFO L78 Accepts]: Start accepts. Automaton has 67562 states and 72735 transitions. Word has length 370 [2021-12-17 03:33:06,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:33:06,930 INFO L470 AbstractCegarLoop]: Abstraction has 67562 states and 72735 transitions. [2021-12-17 03:33:06,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:06,930 INFO L276 IsEmpty]: Start isEmpty. Operand 67562 states and 72735 transitions. [2021-12-17 03:33:06,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2021-12-17 03:33:06,983 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:33:06,983 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 03:33:07,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 03:33:07,199 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,SelfDestructingSolverStorable17 [2021-12-17 03:33:07,200 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:33:07,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:33:07,200 INFO L85 PathProgramCache]: Analyzing trace with hash -646208055, now seen corresponding path program 1 times [2021-12-17 03:33:07,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:33:07,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571969253] [2021-12-17 03:33:07,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:07,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:33:07,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:07,339 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 104 proven. 12 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2021-12-17 03:33:07,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:33:07,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571969253] [2021-12-17 03:33:07,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571969253] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:33:07,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090561225] [2021-12-17 03:33:07,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:07,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:33:07,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:33:07,343 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) [2021-12-17 03:33:07,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 03:33:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:07,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:33:07,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:33:08,198 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 248 proven. 0 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2021-12-17 03:33:08,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:33:08,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090561225] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:33:08,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:33:08,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-17 03:33:08,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544609571] [2021-12-17 03:33:08,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:33:08,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:33:08,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:33:08,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:33:08,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:33:08,201 INFO L87 Difference]: Start difference. First operand 67562 states and 72735 transitions. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:09,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:33:09,175 INFO L93 Difference]: Finished difference Result 134131 states and 144414 transitions. [2021-12-17 03:33:09,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:33:09,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 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 398 [2021-12-17 03:33:09,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:33:09,249 INFO L225 Difference]: With dead ends: 134131 [2021-12-17 03:33:09,249 INFO L226 Difference]: Without dead ends: 66571 [2021-12-17 03:33:09,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:33:09,266 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 77 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:33:09,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 354 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:33:09,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66571 states. [2021-12-17 03:33:09,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66571 to 66547. [2021-12-17 03:33:10,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66547 states, 66546 states have (on average 1.073678357827668) internal successors, (71449), 66546 states have internal predecessors, (71449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:10,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66547 states to 66547 states and 71449 transitions. [2021-12-17 03:33:10,096 INFO L78 Accepts]: Start accepts. Automaton has 66547 states and 71449 transitions. Word has length 398 [2021-12-17 03:33:10,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:33:10,096 INFO L470 AbstractCegarLoop]: Abstraction has 66547 states and 71449 transitions. [2021-12-17 03:33:10,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:10,097 INFO L276 IsEmpty]: Start isEmpty. Operand 66547 states and 71449 transitions. [2021-12-17 03:33:10,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2021-12-17 03:33:10,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:33:10,153 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:33:10,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-17 03:33:10,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:33:10,354 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:33:10,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:33:10,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1465687166, now seen corresponding path program 1 times [2021-12-17 03:33:10,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:33:10,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550043199] [2021-12-17 03:33:10,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:10,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:33:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:10,581 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 379 proven. 124 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-17 03:33:10,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:33:10,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550043199] [2021-12-17 03:33:10,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550043199] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:33:10,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003092026] [2021-12-17 03:33:10,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:10,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:33:10,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:33:10,584 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) [2021-12-17 03:33:10,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 03:33:10,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:10,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 03:33:10,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:33:11,928 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 410 proven. 30 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-17 03:33:11,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 03:33:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 410 proven. 30 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-17 03:33:12,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003092026] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 03:33:12,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 03:33:12,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-17 03:33:12,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716220674] [2021-12-17 03:33:12,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 03:33:12,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 03:33:12,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:33:12,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 03:33:12,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-17 03:33:12,700 INFO L87 Difference]: Start difference. First operand 66547 states and 71449 transitions. Second operand has 7 states, 7 states have (on average 85.85714285714286) internal successors, (601), 7 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:16,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:33:16,448 INFO L93 Difference]: Finished difference Result 260173 states and 279982 transitions. [2021-12-17 03:33:16,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 03:33:16,449 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 85.85714285714286) internal successors, (601), 7 states have internal predecessors, (601), 0 states have call successors, (0), 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 436 [2021-12-17 03:33:16,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:33:16,692 INFO L225 Difference]: With dead ends: 260173 [2021-12-17 03:33:16,692 INFO L226 Difference]: Without dead ends: 193628 [2021-12-17 03:33:16,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 886 GetRequests, 875 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-12-17 03:33:16,730 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 2359 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 3171 mSolverCounterSat, 981 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2359 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 4152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 981 IncrementalHoareTripleChecker+Valid, 3171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:33:16,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2359 Valid, 193 Invalid, 4152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [981 Valid, 3171 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 03:33:16,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193628 states. [2021-12-17 03:33:18,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193628 to 189658. [2021-12-17 03:33:19,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189658 states, 189657 states have (on average 1.074423828279473) internal successors, (203772), 189657 states have internal predecessors, (203772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:19,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189658 states to 189658 states and 203772 transitions. [2021-12-17 03:33:19,330 INFO L78 Accepts]: Start accepts. Automaton has 189658 states and 203772 transitions. Word has length 436 [2021-12-17 03:33:19,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:33:19,330 INFO L470 AbstractCegarLoop]: Abstraction has 189658 states and 203772 transitions. [2021-12-17 03:33:19,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 85.85714285714286) internal successors, (601), 7 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:19,331 INFO L276 IsEmpty]: Start isEmpty. Operand 189658 states and 203772 transitions. [2021-12-17 03:33:19,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2021-12-17 03:33:19,404 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:33:19,404 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:33:19,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 03:33:19,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:33:19,606 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:33:19,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:33:19,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1260884401, now seen corresponding path program 1 times [2021-12-17 03:33:19,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:33:19,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091484488] [2021-12-17 03:33:19,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:19,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:33:19,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 416 proven. 154 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 03:33:20,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:33:20,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091484488] [2021-12-17 03:33:20,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091484488] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:33:20,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076102752] [2021-12-17 03:33:20,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:20,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:33:20,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:33:20,423 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:33:20,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 03:33:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:20,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 03:33:20,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:33:21,607 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 570 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 03:33:21,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:33:21,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076102752] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:33:21,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:33:21,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-12-17 03:33:21,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432127891] [2021-12-17 03:33:21,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:33:21,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:33:21,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:33:21,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:33:21,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-17 03:33:21,609 INFO L87 Difference]: Start difference. First operand 189658 states and 203772 transitions. Second operand has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:23,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:33:23,633 INFO L93 Difference]: Finished difference Result 398654 states and 428308 transitions. [2021-12-17 03:33:23,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:33:23,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 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 468 [2021-12-17 03:33:23,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:33:23,922 INFO L225 Difference]: With dead ends: 398654 [2021-12-17 03:33:23,922 INFO L226 Difference]: Without dead ends: 208998 [2021-12-17 03:33:23,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-17 03:33:24,000 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 280 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 03:33:24,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 89 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 03:33:24,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208998 states. [2021-12-17 03:33:26,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208998 to 198764. [2021-12-17 03:33:26,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198764 states, 198763 states have (on average 1.0699476260672258) internal successors, (212666), 198763 states have internal predecessors, (212666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:26,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198764 states to 198764 states and 212666 transitions. [2021-12-17 03:33:26,906 INFO L78 Accepts]: Start accepts. Automaton has 198764 states and 212666 transitions. Word has length 468 [2021-12-17 03:33:26,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:33:26,906 INFO L470 AbstractCegarLoop]: Abstraction has 198764 states and 212666 transitions. [2021-12-17 03:33:26,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:26,906 INFO L276 IsEmpty]: Start isEmpty. Operand 198764 states and 212666 transitions. [2021-12-17 03:33:27,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2021-12-17 03:33:27,422 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:33:27,423 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:33:27,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-17 03:33:27,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-17 03:33:27,637 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:33:27,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:33:27,637 INFO L85 PathProgramCache]: Analyzing trace with hash 267208713, now seen corresponding path program 1 times [2021-12-17 03:33:27,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:33:27,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056761715] [2021-12-17 03:33:27,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:27,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:33:27,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:27,844 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 423 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-12-17 03:33:27,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:33:27,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056761715] [2021-12-17 03:33:27,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056761715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:33:27,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:33:27,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:33:27,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720316147] [2021-12-17 03:33:27,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:33:27,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:33:27,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:33:27,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:33:27,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:33:27,847 INFO L87 Difference]: Start difference. First operand 198764 states and 212666 transitions. Second operand has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:29,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:33:29,523 INFO L93 Difference]: Finished difference Result 390828 states and 418078 transitions. [2021-12-17 03:33:29,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:33:29,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 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 476 [2021-12-17 03:33:29,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:33:29,801 INFO L225 Difference]: With dead ends: 390828 [2021-12-17 03:33:29,802 INFO L226 Difference]: Without dead ends: 192066 [2021-12-17 03:33:29,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:33:29,908 INFO L933 BasicCegarLoop]: 343 mSDtfsCounter, 202 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:33:29,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 367 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:33:30,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192066 states. [2021-12-17 03:33:32,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192066 to 190361. [2021-12-17 03:33:32,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190361 states, 190360 states have (on average 1.0672935490649296) internal successors, (203170), 190360 states have internal predecessors, (203170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:32,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190361 states to 190361 states and 203170 transitions. [2021-12-17 03:33:32,781 INFO L78 Accepts]: Start accepts. Automaton has 190361 states and 203170 transitions. Word has length 476 [2021-12-17 03:33:32,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:33:32,781 INFO L470 AbstractCegarLoop]: Abstraction has 190361 states and 203170 transitions. [2021-12-17 03:33:32,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:32,781 INFO L276 IsEmpty]: Start isEmpty. Operand 190361 states and 203170 transitions. [2021-12-17 03:33:32,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2021-12-17 03:33:32,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:33:32,868 INFO L514 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 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, 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] [2021-12-17 03:33:32,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-17 03:33:32,868 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:33:32,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:33:32,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1045426388, now seen corresponding path program 1 times [2021-12-17 03:33:32,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:33:32,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339189993] [2021-12-17 03:33:32,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:32,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:33:32,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 606 proven. 18 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-12-17 03:33:33,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:33:33,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339189993] [2021-12-17 03:33:33,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339189993] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:33:33,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776147271] [2021-12-17 03:33:33,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:33:33,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:33:33,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:33:33,076 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:33:33,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 03:33:33,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:33:33,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 03:33:33,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:33:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 503 proven. 0 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2021-12-17 03:33:33,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 03:33:33,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776147271] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:33:33,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 03:33:33,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-17 03:33:33,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924972226] [2021-12-17 03:33:33,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:33:33,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:33:33,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:33:33,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:33:33,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 03:33:33,978 INFO L87 Difference]: Start difference. First operand 190361 states and 203170 transitions. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 2 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:33:35,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:33:35,683 INFO L93 Difference]: Finished difference Result 517758 states and 552586 transitions. [2021-12-17 03:33:35,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:33:35,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 2 states have internal predecessors, (278), 0 states have call successors, (0), 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 519 [2021-12-17 03:33:35,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:33:36,736 INFO L225 Difference]: With dead ends: 517758 [2021-12-17 03:33:36,736 INFO L226 Difference]: Without dead ends: 327399 [2021-12-17 03:33:36,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 03:33:36,864 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 198 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:33:36,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 524 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 03:33:37,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327399 states. [2021-12-17 03:33:40,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327399 to 327381. [2021-12-17 03:33:40,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327381 states, 327380 states have (on average 1.0669252856008309) internal successors, (349290), 327380 states have internal predecessors, (349290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)