./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-pthread/cs_peterson.i --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/seq-pthread/cs_peterson.i -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 4a8be7009a37d1df58713fd67cd9771c39e6139a0416009824ceb58da10928b7 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 17:12:51,008 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 17:12:51,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 17:12:51,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 17:12:51,078 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 17:12:51,082 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 17:12:51,083 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 17:12:51,088 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 17:12:51,089 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 17:12:51,090 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 17:12:51,091 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 17:12:51,093 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 17:12:51,093 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 17:12:51,099 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 17:12:51,101 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 17:12:51,102 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 17:12:51,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 17:12:51,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 17:12:51,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 17:12:51,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 17:12:51,114 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 17:12:51,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 17:12:51,117 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 17:12:51,118 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 17:12:51,120 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 17:12:51,121 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 17:12:51,121 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 17:12:51,122 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 17:12:51,123 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 17:12:51,124 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 17:12:51,124 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 17:12:51,125 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 17:12:51,126 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 17:12:51,127 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 17:12:51,128 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 17:12:51,128 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 17:12:51,129 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 17:12:51,129 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 17:12:51,129 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 17:12:51,130 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 17:12:51,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 17:12:51,132 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 17:12:51,165 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 17:12:51,165 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 17:12:51,166 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 17:12:51,166 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 17:12:51,167 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 17:12:51,167 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 17:12:51,168 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 17:12:51,168 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 17:12:51,168 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 17:12:51,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 17:12:51,169 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 17:12:51,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 17:12:51,169 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 17:12:51,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 17:12:51,170 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 17:12:51,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 17:12:51,170 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 17:12:51,170 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 17:12:51,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 17:12:51,170 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 17:12:51,171 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 17:12:51,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 17:12:51,171 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 17:12:51,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 17:12:51,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 17:12:51,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 17:12:51,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 17:12:51,172 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 17:12:51,172 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 17:12:51,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 17:12:51,173 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 17:12:51,173 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 17:12:51,173 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 17:12:51,173 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 17:12:51,173 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a8be7009a37d1df58713fd67cd9771c39e6139a0416009824ceb58da10928b7 [2021-12-17 17:12:51,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 17:12:51,442 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 17:12:51,444 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 17:12:51,445 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 17:12:51,446 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 17:12:51,447 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-pthread/cs_peterson.i [2021-12-17 17:12:51,493 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d821bb38d/d890cce85d634b498199eab423c04a90/FLAGdbaff1b1d [2021-12-17 17:12:52,004 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 17:12:52,008 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_peterson.i [2021-12-17 17:12:52,030 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d821bb38d/d890cce85d634b498199eab423c04a90/FLAGdbaff1b1d [2021-12-17 17:12:52,313 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d821bb38d/d890cce85d634b498199eab423c04a90 [2021-12-17 17:12:52,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 17:12:52,316 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 17:12:52,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 17:12:52,318 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 17:12:52,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 17:12:52,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 05:12:52" (1/1) ... [2021-12-17 17:12:52,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f8489cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:12:52, skipping insertion in model container [2021-12-17 17:12:52,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 05:12:52" (1/1) ... [2021-12-17 17:12:52,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 17:12:52,371 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 17:12:52,642 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_peterson.i[23605,23618] [2021-12-17 17:12:52,745 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 17:12:52,754 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 17:12:52,783 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_peterson.i[23605,23618] [2021-12-17 17:12:52,848 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 17:12:52,878 INFO L208 MainTranslator]: Completed translation [2021-12-17 17:12:52,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:12:52 WrapperNode [2021-12-17 17:12:52,879 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 17:12:52,880 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 17:12:52,880 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 17:12:52,880 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 17:12:52,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:12:52" (1/1) ... [2021-12-17 17:12:52,910 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:12:52" (1/1) ... [2021-12-17 17:12:52,957 INFO L137 Inliner]: procedures = 145, calls = 276, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 428 [2021-12-17 17:12:52,957 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 17:12:52,958 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 17:12:52,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 17:12:52,958 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 17:12:52,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:12:52" (1/1) ... [2021-12-17 17:12:52,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:12:52" (1/1) ... [2021-12-17 17:12:52,985 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:12:52" (1/1) ... [2021-12-17 17:12:52,985 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:12:52" (1/1) ... [2021-12-17 17:12:53,004 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:12:52" (1/1) ... [2021-12-17 17:12:53,009 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:12:52" (1/1) ... [2021-12-17 17:12:53,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:12:52" (1/1) ... [2021-12-17 17:12:53,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 17:12:53,016 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 17:12:53,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 17:12:53,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 17:12:53,019 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:12:52" (1/1) ... [2021-12-17 17:12:53,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 17:12:53,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 17:12:53,060 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 17:12:53,081 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 17:12:53,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 17:12:53,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 17:12:53,097 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-17 17:12:53,097 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-17 17:12:53,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 17:12:53,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 17:12:53,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-17 17:12:53,099 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_create [2021-12-17 17:12:53,099 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_create [2021-12-17 17:12:53,099 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-17 17:12:53,100 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_join [2021-12-17 17:12:53,100 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_join [2021-12-17 17:12:53,100 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~$Pointer$ [2021-12-17 17:12:53,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~$Pointer$ [2021-12-17 17:12:53,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 17:12:53,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-17 17:12:53,101 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_cs [2021-12-17 17:12:53,101 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_cs [2021-12-17 17:12:53,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 17:12:53,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 17:12:53,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 17:12:53,271 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 17:12:53,272 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 17:12:56,019 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 17:12:56,030 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 17:12:56,031 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 17:12:56,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 05:12:56 BoogieIcfgContainer [2021-12-17 17:12:56,033 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 17:12:56,035 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 17:12:56,035 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 17:12:56,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 17:12:56,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 05:12:52" (1/3) ... [2021-12-17 17:12:56,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6299061b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 05:12:56, skipping insertion in model container [2021-12-17 17:12:56,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:12:52" (2/3) ... [2021-12-17 17:12:56,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6299061b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 05:12:56, skipping insertion in model container [2021-12-17 17:12:56,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 05:12:56" (3/3) ... [2021-12-17 17:12:56,042 INFO L111 eAbstractionObserver]: Analyzing ICFG cs_peterson.i [2021-12-17 17:12:56,047 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 17:12:56,047 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 17:12:56,083 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 17:12:56,089 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 17:12:56,089 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 17:12:56,108 INFO L276 IsEmpty]: Start isEmpty. Operand has 115 states, 74 states have (on average 1.3243243243243243) internal successors, (98), 75 states have internal predecessors, (98), 34 states have call successors, (34), 5 states have call predecessors, (34), 5 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-17 17:12:56,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-17 17:12:56,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 17:12:56,123 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:12:56,124 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 17:12:56,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 17:12:56,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1708268069, now seen corresponding path program 1 times [2021-12-17 17:12:56,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 17:12:56,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628706582] [2021-12-17 17:12:56,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 17:12:56,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 17:12:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:12:59,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 17:12:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:12:59,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 17:12:59,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:12:59,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 17:12:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:12:59,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 17:12:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:12:59,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-17 17:12:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:12:59,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 17:12:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:12:59,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 17:12:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:12:59,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 17:12:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:12:59,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 17:12:59,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:12:59,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 17:12:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:12:59,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-17 17:12:59,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:12:59,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 17:12:59,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:12:59,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-17 17:12:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:12:59,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-17 17:12:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:12:59,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-17 17:12:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:12:59,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 17:12:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:12:59,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-17 17:12:59,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:12:59,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-17 17:12:59,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:12:59,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-17 17:12:59,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:12:59,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-17 17:12:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:12:59,573 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2021-12-17 17:12:59,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 17:12:59,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628706582] [2021-12-17 17:12:59,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628706582] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 17:12:59,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 17:12:59,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 17:12:59,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306362907] [2021-12-17 17:12:59,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 17:12:59,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 17:12:59,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 17:12:59,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 17:12:59,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 17:12:59,606 INFO L87 Difference]: Start difference. First operand has 115 states, 74 states have (on average 1.3243243243243243) internal successors, (98), 75 states have internal predecessors, (98), 34 states have call successors, (34), 5 states have call predecessors, (34), 5 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-12-17 17:12:59,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 17:12:59,754 INFO L93 Difference]: Finished difference Result 232 states and 370 transitions. [2021-12-17 17:12:59,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 17:12:59,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 132 [2021-12-17 17:12:59,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 17:12:59,764 INFO L225 Difference]: With dead ends: 232 [2021-12-17 17:12:59,764 INFO L226 Difference]: Without dead ends: 115 [2021-12-17 17:12:59,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 62 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 17:12:59,785 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 4 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 17:12:59,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 316 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 17:12:59,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-17 17:12:59,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2021-12-17 17:12:59,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 72 states have (on average 1.2638888888888888) internal successors, (91), 72 states have internal predecessors, (91), 34 states have call successors, (34), 5 states have call predecessors, (34), 5 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-17 17:12:59,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 159 transitions. [2021-12-17 17:12:59,861 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 159 transitions. Word has length 132 [2021-12-17 17:12:59,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 17:12:59,862 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 159 transitions. [2021-12-17 17:12:59,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-12-17 17:12:59,862 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 159 transitions. [2021-12-17 17:12:59,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-17 17:12:59,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 17:12:59,867 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:12:59,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 17:12:59,867 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 17:12:59,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 17:12:59,868 INFO L85 PathProgramCache]: Analyzing trace with hash -87290515, now seen corresponding path program 1 times [2021-12-17 17:12:59,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 17:12:59,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269531287] [2021-12-17 17:12:59,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 17:12:59,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 17:13:01,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:01,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 17:13:01,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:01,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 17:13:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:01,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 17:13:01,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:01,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 17:13:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:01,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 17:13:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:01,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-17 17:13:01,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:01,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 17:13:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:01,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 17:13:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:01,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-17 17:13:01,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:01,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 17:13:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:01,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 17:13:01,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:01,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 17:13:01,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:01,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 17:13:01,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:01,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-17 17:13:01,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:01,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-17 17:13:01,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:01,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 17:13:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:01,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-17 17:13:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:01,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-17 17:13:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:01,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-17 17:13:01,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:01,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 17:13:01,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:01,352 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2021-12-17 17:13:01,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 17:13:01,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269531287] [2021-12-17 17:13:01,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269531287] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 17:13:01,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 17:13:01,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 17:13:01,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742846037] [2021-12-17 17:13:01,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 17:13:01,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 17:13:01,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 17:13:01,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 17:13:01,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 17:13:01,356 INFO L87 Difference]: Start difference. First operand 112 states and 159 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-12-17 17:13:01,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 17:13:01,385 INFO L93 Difference]: Finished difference Result 223 states and 318 transitions. [2021-12-17 17:13:01,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 17:13:01,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 135 [2021-12-17 17:13:01,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 17:13:01,387 INFO L225 Difference]: With dead ends: 223 [2021-12-17 17:13:01,387 INFO L226 Difference]: Without dead ends: 114 [2021-12-17 17:13:01,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 42 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 17:13:01,389 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 1 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 17:13:01,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 309 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 17:13:01,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-17 17:13:01,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-12-17 17:13:01,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 73 states have (on average 1.2602739726027397) internal successors, (92), 73 states have internal predecessors, (92), 34 states have call successors, (34), 5 states have call predecessors, (34), 5 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-17 17:13:01,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 160 transitions. [2021-12-17 17:13:01,403 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 160 transitions. Word has length 135 [2021-12-17 17:13:01,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 17:13:01,403 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 160 transitions. [2021-12-17 17:13:01,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-12-17 17:13:01,403 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 160 transitions. [2021-12-17 17:13:01,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-17 17:13:01,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 17:13:01,406 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:13:01,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 17:13:01,407 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 17:13:01,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 17:13:01,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1055313711, now seen corresponding path program 1 times [2021-12-17 17:13:01,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 17:13:01,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913733251] [2021-12-17 17:13:01,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 17:13:01,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 17:13:02,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:02,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 17:13:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:02,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-17 17:13:02,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:02,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 17:13:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:02,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 17:13:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:02,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 17:13:02,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:02,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 17:13:02,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:02,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 17:13:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:02,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-17 17:13:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:02,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 17:13:02,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:02,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 17:13:02,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:02,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-17 17:13:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:02,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 17:13:02,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:02,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-17 17:13:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:02,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-17 17:13:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:02,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 17:13:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:02,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 17:13:02,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:02,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 17:13:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:02,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-17 17:13:02,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:02,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-17 17:13:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:02,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-17 17:13:02,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:02,672 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2021-12-17 17:13:02,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 17:13:02,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913733251] [2021-12-17 17:13:02,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913733251] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 17:13:02,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21190818] [2021-12-17 17:13:02,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 17:13:02,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 17:13:02,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 17:13:02,676 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 17:13:02,683 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 17:13:07,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:08,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 18469 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 17:13:08,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 17:13:08,310 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2021-12-17 17:13:08,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 17:13:08,600 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2021-12-17 17:13:08,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21190818] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 17:13:08,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 17:13:08,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2021-12-17 17:13:08,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049134444] [2021-12-17 17:13:08,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 17:13:08,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 17:13:08,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 17:13:08,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 17:13:08,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-17 17:13:08,604 INFO L87 Difference]: Start difference. First operand 113 states and 160 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 1 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) [2021-12-17 17:13:08,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 17:13:08,651 INFO L93 Difference]: Finished difference Result 227 states and 323 transitions. [2021-12-17 17:13:08,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 17:13:08,651 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 1 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) Word has length 137 [2021-12-17 17:13:08,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 17:13:08,653 INFO L225 Difference]: With dead ends: 227 [2021-12-17 17:13:08,653 INFO L226 Difference]: Without dead ends: 117 [2021-12-17 17:13:08,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 311 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-17 17:13:08,655 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 3 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 17:13:08,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 462 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 17:13:08,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-17 17:13:08,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-12-17 17:13:08,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 77 states have (on average 1.2467532467532467) internal successors, (96), 77 states have internal predecessors, (96), 34 states have call successors, (34), 5 states have call predecessors, (34), 5 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-17 17:13:08,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 164 transitions. [2021-12-17 17:13:08,668 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 164 transitions. Word has length 137 [2021-12-17 17:13:08,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 17:13:08,669 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 164 transitions. [2021-12-17 17:13:08,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 1 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 1 states have call predecessors, (40), 1 states have call successors, (40) [2021-12-17 17:13:08,669 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 164 transitions. [2021-12-17 17:13:08,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-17 17:13:08,672 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 17:13:08,672 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:13:08,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 17:13:08,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 17:13:08,884 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 17:13:08,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 17:13:08,884 INFO L85 PathProgramCache]: Analyzing trace with hash 953694515, now seen corresponding path program 2 times [2021-12-17 17:13:08,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 17:13:08,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373423171] [2021-12-17 17:13:08,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 17:13:08,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 17:13:11,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:11,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 17:13:11,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:11,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-17 17:13:11,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:11,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-17 17:13:11,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:11,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 17:13:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:11,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-17 17:13:11,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:11,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 17:13:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:11,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-17 17:13:11,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:11,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-17 17:13:11,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:11,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 17:13:11,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:11,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 17:13:11,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:11,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 17:13:11,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:11,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-17 17:13:11,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:11,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-17 17:13:11,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:11,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-17 17:13:11,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:11,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-17 17:13:11,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:11,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-17 17:13:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:11,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-17 17:13:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:11,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-17 17:13:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:11,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 17:13:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:11,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-17 17:13:11,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:11,580 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 769 trivial. 0 not checked. [2021-12-17 17:13:11,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 17:13:11,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373423171] [2021-12-17 17:13:11,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373423171] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 17:13:11,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132427608] [2021-12-17 17:13:11,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 17:13:11,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 17:13:11,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 17:13:11,582 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 17:13:11,616 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 17:13:54,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-17 17:13:54,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 17:13:54,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 18077 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 17:13:54,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 17:13:54,606 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2021-12-17 17:13:54,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 17:13:54,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132427608] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 17:13:54,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 17:13:54,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-17 17:13:54,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091138807] [2021-12-17 17:13:54,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 17:13:54,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 17:13:54,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 17:13:54,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 17:13:54,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 17:13:54,609 INFO L87 Difference]: Start difference. First operand 117 states and 164 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-12-17 17:13:54,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 17:13:54,648 INFO L93 Difference]: Finished difference Result 219 states and 314 transitions. [2021-12-17 17:13:54,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 17:13:54,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 141 [2021-12-17 17:13:54,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 17:13:54,652 INFO L225 Difference]: With dead ends: 219 [2021-12-17 17:13:54,652 INFO L226 Difference]: Without dead ends: 173 [2021-12-17 17:13:54,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 17:13:54,654 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 77 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 17:13:54,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 550 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 17:13:54,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-17 17:13:54,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-12-17 17:13:54,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 115 states have (on average 1.2869565217391303) internal successors, (148), 115 states have internal predecessors, (148), 47 states have call successors, (47), 10 states have call predecessors, (47), 10 states have return successors, (51), 47 states have call predecessors, (51), 47 states have call successors, (51) [2021-12-17 17:13:54,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 246 transitions. [2021-12-17 17:13:54,680 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 246 transitions. Word has length 141 [2021-12-17 17:13:54,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 17:13:54,681 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 246 transitions. [2021-12-17 17:13:54,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-12-17 17:13:54,681 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 246 transitions. [2021-12-17 17:13:54,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-12-17 17:13:54,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 17:13:54,685 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-12-17 17:13:54,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-17 17:13:54,907 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,SelfDestructingSolverStorable3 [2021-12-17 17:13:54,908 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 17:13:54,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 17:13:54,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1512555135, now seen corresponding path program 1 times [2021-12-17 17:13:54,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 17:13:54,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827398717] [2021-12-17 17:13:54,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 17:13:54,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 17:13:56,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 17:13:57,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 17:13:57,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 17:13:57,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 17:13:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 17:13:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 17:13:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 17:13:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 17:13:57,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 17:13:57,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 17:13:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 17:13:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 17:13:57,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 17:13:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-17 17:13:57,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-17 17:13:57,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 17:13:57,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-17 17:13:57,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-17 17:13:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 17:13:57,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-17 17:13:57,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-17 17:13:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-17 17:13:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-17 17:13:57,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-12-17 17:13:57,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-17 17:13:57,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-17 17:13:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2021-12-17 17:13:57,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-12-17 17:13:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-12-17 17:13:57,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2021-12-17 17:13:57,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2021-12-17 17:13:57,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2021-12-17 17:13:57,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:13:57,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1159 trivial. 0 not checked. [2021-12-17 17:13:57,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 17:13:57,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827398717] [2021-12-17 17:13:57,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827398717] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 17:13:57,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408340210] [2021-12-17 17:13:57,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 17:13:57,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 17:13:57,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 17:13:57,264 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 17:13:57,292 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 17:14:04,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:04,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 18946 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 17:14:04,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 17:14:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1159 trivial. 0 not checked. [2021-12-17 17:14:04,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 17:14:05,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1159 trivial. 0 not checked. [2021-12-17 17:14:05,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408340210] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 17:14:05,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 17:14:05,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 10 [2021-12-17 17:14:05,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045776262] [2021-12-17 17:14:05,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 17:14:05,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 17:14:05,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 17:14:05,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 17:14:05,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-17 17:14:05,117 INFO L87 Difference]: Start difference. First operand 173 states and 246 transitions. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 6 states have internal predecessors, (104), 2 states have call successors, (66), 6 states have call predecessors, (66), 2 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2021-12-17 17:14:07,214 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 17:14:09,240 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 17:14:09,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 17:14:09,696 INFO L93 Difference]: Finished difference Result 362 states and 514 transitions. [2021-12-17 17:14:09,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 17:14:09,696 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 6 states have internal predecessors, (104), 2 states have call successors, (66), 6 states have call predecessors, (66), 2 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) Word has length 218 [2021-12-17 17:14:09,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 17:14:09,698 INFO L225 Difference]: With dead ends: 362 [2021-12-17 17:14:09,698 INFO L226 Difference]: Without dead ends: 201 [2021-12-17 17:14:09,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 495 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-12-17 17:14:09,702 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 79 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 147 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-12-17 17:14:09,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 662 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 293 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2021-12-17 17:14:09,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-17 17:14:09,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 196. [2021-12-17 17:14:09,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 136 states have (on average 1.2573529411764706) internal successors, (171), 138 states have internal predecessors, (171), 47 states have call successors, (47), 10 states have call predecessors, (47), 12 states have return successors, (55), 47 states have call predecessors, (55), 47 states have call successors, (55) [2021-12-17 17:14:09,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 273 transitions. [2021-12-17 17:14:09,724 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 273 transitions. Word has length 218 [2021-12-17 17:14:09,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 17:14:09,724 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 273 transitions. [2021-12-17 17:14:09,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 6 states have internal predecessors, (104), 2 states have call successors, (66), 6 states have call predecessors, (66), 2 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2021-12-17 17:14:09,725 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 273 transitions. [2021-12-17 17:14:09,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-12-17 17:14:09,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 17:14:09,729 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 9, 9, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-12-17 17:14:09,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-17 17:14:09,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 17:14:09,944 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 17:14:09,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 17:14:09,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1896156545, now seen corresponding path program 2 times [2021-12-17 17:14:09,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 17:14:09,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896753812] [2021-12-17 17:14:09,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 17:14:09,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 17:14:18,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:20,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 17:14:20,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:20,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 17:14:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:20,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 17:14:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:20,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 17:14:20,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:20,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 17:14:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:20,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 17:14:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:20,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 17:14:20,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:20,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 17:14:20,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:20,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 17:14:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:20,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 17:14:20,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:20,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 17:14:20,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:21,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 17:14:21,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:21,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 17:14:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:21,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-17 17:14:21,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:21,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-17 17:14:21,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:21,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 17:14:21,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:21,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-17 17:14:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:21,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-17 17:14:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:21,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-17 17:14:21,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:21,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-17 17:14:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:21,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-12-17 17:14:21,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:21,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-17 17:14:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:21,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-17 17:14:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:21,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2021-12-17 17:14:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:21,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-12-17 17:14:21,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:21,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-12-17 17:14:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:21,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2021-12-17 17:14:21,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:21,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2021-12-17 17:14:21,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:21,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2021-12-17 17:14:21,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:21,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2021-12-17 17:14:21,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:21,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2021-12-17 17:14:21,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:21,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2021-12-17 17:14:21,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:14:21,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1258 trivial. 0 not checked. [2021-12-17 17:14:21,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 17:14:21,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896753812] [2021-12-17 17:14:21,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896753812] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 17:14:21,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525975563] [2021-12-17 17:14:21,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 17:14:21,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 17:14:21,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 17:14:21,069 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 17:14:21,072 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 17:15:01,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-17 17:15:01,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 17:15:02,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 18163 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 17:15:02,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 17:15:02,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1261 trivial. 0 not checked. [2021-12-17 17:15:02,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 17:15:02,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525975563] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 17:15:02,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 17:15:02,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2021-12-17 17:15:02,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221731045] [2021-12-17 17:15:02,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 17:15:02,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 17:15:02,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 17:15:02,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 17:15:02,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-12-17 17:15:02,389 INFO L87 Difference]: Start difference. First operand 196 states and 273 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (29), 1 states have call predecessors, (29), 1 states have return successors, (29), 1 states have call predecessors, (29), 1 states have call successors, (29) [2021-12-17 17:15:02,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 17:15:02,413 INFO L93 Difference]: Finished difference Result 352 states and 494 transitions. [2021-12-17 17:15:02,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 17:15:02,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (29), 1 states have call predecessors, (29), 1 states have return successors, (29), 1 states have call predecessors, (29), 1 states have call successors, (29) Word has length 236 [2021-12-17 17:15:02,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 17:15:02,418 INFO L225 Difference]: With dead ends: 352 [2021-12-17 17:15:02,418 INFO L226 Difference]: Without dead ends: 196 [2021-12-17 17:15:02,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 293 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-12-17 17:15:02,421 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 0 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 17:15:02,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 310 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 17:15:02,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-17 17:15:02,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2021-12-17 17:15:02,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 136 states have (on average 1.25) internal successors, (170), 138 states have internal predecessors, (170), 47 states have call successors, (47), 10 states have call predecessors, (47), 12 states have return successors, (55), 47 states have call predecessors, (55), 47 states have call successors, (55) [2021-12-17 17:15:02,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 272 transitions. [2021-12-17 17:15:02,450 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 272 transitions. Word has length 236 [2021-12-17 17:15:02,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 17:15:02,450 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 272 transitions. [2021-12-17 17:15:02,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (29), 1 states have call predecessors, (29), 1 states have return successors, (29), 1 states have call predecessors, (29), 1 states have call successors, (29) [2021-12-17 17:15:02,451 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 272 transitions. [2021-12-17 17:15:02,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-12-17 17:15:02,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 17:15:02,454 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 9, 9, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 17:15:02,545 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 17:15:02,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 17:15:02,655 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 17:15:02,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 17:15:02,655 INFO L85 PathProgramCache]: Analyzing trace with hash -252779862, now seen corresponding path program 1 times [2021-12-17 17:15:02,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 17:15:02,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915273031] [2021-12-17 17:15:02,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 17:15:02,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 17:15:09,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 17:15:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 17:15:11,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 17:15:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-17 17:15:11,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 17:15:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 17:15:11,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 17:15:11,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 17:15:11,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 17:15:11,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 17:15:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 17:15:11,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 17:15:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 17:15:11,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 17:15:11,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 17:15:11,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-17 17:15:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-17 17:15:11,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-17 17:15:11,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-17 17:15:11,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-12-17 17:15:11,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 17:15:11,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-17 17:15:11,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-17 17:15:11,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-17 17:15:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-12-17 17:15:11,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-12-17 17:15:11,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2021-12-17 17:15:11,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2021-12-17 17:15:11,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2021-12-17 17:15:11,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2021-12-17 17:15:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2021-12-17 17:15:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2021-12-17 17:15:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2021-12-17 17:15:11,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2021-12-17 17:15:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 248 [2021-12-17 17:15:11,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1391 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1385 trivial. 0 not checked. [2021-12-17 17:15:11,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 17:15:11,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915273031] [2021-12-17 17:15:11,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915273031] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 17:15:11,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457437814] [2021-12-17 17:15:11,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 17:15:11,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 17:15:11,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 17:15:11,575 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 17:15:11,604 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 17:15:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:20,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 19449 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 17:15:20,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 17:15:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1391 backedges. 243 proven. 0 refuted. 0 times theorem prover too weak. 1148 trivial. 0 not checked. [2021-12-17 17:15:20,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 17:15:20,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457437814] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 17:15:20,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 17:15:20,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 17 [2021-12-17 17:15:20,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871728682] [2021-12-17 17:15:20,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 17:15:20,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 17:15:20,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 17:15:20,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 17:15:20,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-12-17 17:15:20,694 INFO L87 Difference]: Start difference. First operand 196 states and 272 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (33), 5 states have call predecessors, (33), 3 states have call successors, (33) [2021-12-17 17:15:21,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 17:15:21,175 INFO L93 Difference]: Finished difference Result 450 states and 653 transitions. [2021-12-17 17:15:21,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 17:15:21,176 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (33), 5 states have call predecessors, (33), 3 states have call successors, (33) Word has length 256 [2021-12-17 17:15:21,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 17:15:21,178 INFO L225 Difference]: With dead ends: 450 [2021-12-17 17:15:21,178 INFO L226 Difference]: Without dead ends: 287 [2021-12-17 17:15:21,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 316 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-12-17 17:15:21,180 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 260 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 17:15:21,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 448 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 17:15:21,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-12-17 17:15:21,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 279. [2021-12-17 17:15:21,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 193 states have (on average 1.1865284974093264) internal successors, (229), 186 states have internal predecessors, (229), 67 states have call successors, (67), 11 states have call predecessors, (67), 18 states have return successors, (94), 81 states have call predecessors, (94), 67 states have call successors, (94) [2021-12-17 17:15:21,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 390 transitions. [2021-12-17 17:15:21,201 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 390 transitions. Word has length 256 [2021-12-17 17:15:21,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 17:15:21,201 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 390 transitions. [2021-12-17 17:15:21,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (33), 5 states have call predecessors, (33), 3 states have call successors, (33) [2021-12-17 17:15:21,202 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 390 transitions. [2021-12-17 17:15:21,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-12-17 17:15:21,205 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 17:15:21,205 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 9, 9, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 17:15:21,296 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 17:15:21,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 17:15:21,432 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 17:15:21,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 17:15:21,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1628004584, now seen corresponding path program 1 times [2021-12-17 17:15:21,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 17:15:21,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88593003] [2021-12-17 17:15:21,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 17:15:21,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 17:15:30,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 17:15:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 17:15:31,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 17:15:31,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-17 17:15:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 17:15:31,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 17:15:31,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 17:15:31,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 17:15:31,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 17:15:31,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 17:15:31,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 17:15:31,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 17:15:31,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-17 17:15:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-17 17:15:31,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 17:15:31,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-17 17:15:31,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-17 17:15:31,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-17 17:15:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-17 17:15:31,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-12-17 17:15:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 17:15:31,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-17 17:15:31,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-17 17:15:31,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-17 17:15:31,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-12-17 17:15:31,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-12-17 17:15:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2021-12-17 17:15:31,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2021-12-17 17:15:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2021-12-17 17:15:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2021-12-17 17:15:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2021-12-17 17:15:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2021-12-17 17:15:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2021-12-17 17:15:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2021-12-17 17:15:31,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 248 [2021-12-17 17:15:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:31,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1391 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1385 trivial. 0 not checked. [2021-12-17 17:15:31,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 17:15:31,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88593003] [2021-12-17 17:15:31,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88593003] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 17:15:31,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409889821] [2021-12-17 17:15:31,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 17:15:31,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 17:15:31,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 17:15:31,524 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 17:15:31,528 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 17:15:42,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 17:15:42,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 19421 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 17:15:42,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 17:15:43,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1391 backedges. 414 proven. 21 refuted. 0 times theorem prover too weak. 956 trivial. 0 not checked. [2021-12-17 17:15:43,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 17:15:44,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1391 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 1355 trivial. 0 not checked. [2021-12-17 17:15:44,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409889821] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 17:15:44,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 17:15:44,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 26 [2021-12-17 17:15:44,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682421080] [2021-12-17 17:15:44,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 17:15:44,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-17 17:15:44,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 17:15:44,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-17 17:15:44,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-12-17 17:15:44,389 INFO L87 Difference]: Start difference. First operand 279 states and 390 transitions. Second operand has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 21 states have internal predecessors, (121), 15 states have call successors, (66), 12 states have call predecessors, (66), 12 states have return successors, (65), 15 states have call predecessors, (65), 15 states have call successors, (65) [2021-12-17 17:15:46,418 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 17:15:48,462 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 17:15:50,477 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 17:15:52,508 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 17:15:57,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 17:15:57,249 INFO L93 Difference]: Finished difference Result 1050 states and 1503 transitions. [2021-12-17 17:15:57,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-17 17:15:57,252 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 21 states have internal predecessors, (121), 15 states have call successors, (66), 12 states have call predecessors, (66), 12 states have return successors, (65), 15 states have call predecessors, (65), 15 states have call successors, (65) Word has length 256 [2021-12-17 17:15:57,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 17:15:57,260 INFO L225 Difference]: With dead ends: 1050 [2021-12-17 17:15:57,260 INFO L226 Difference]: Without dead ends: 804 [2021-12-17 17:15:57,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 577 SyntacticMatches, 6 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2633 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1376, Invalid=6996, Unknown=0, NotChecked=0, Total=8372 [2021-12-17 17:15:57,265 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 1121 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 2245 mSolverCounterSat, 1111 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 3360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1111 IncrementalHoareTripleChecker+Valid, 2245 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2021-12-17 17:15:57,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1126 Valid, 1129 Invalid, 3360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1111 Valid, 2245 Invalid, 4 Unknown, 0 Unchecked, 10.5s Time] [2021-12-17 17:15:57,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-12-17 17:15:57,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 646. [2021-12-17 17:15:57,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 452 states have (on average 1.1969026548672566) internal successors, (541), 443 states have internal predecessors, (541), 122 states have call successors, (122), 48 states have call predecessors, (122), 71 states have return successors, (215), 154 states have call predecessors, (215), 122 states have call successors, (215) [2021-12-17 17:15:57,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 878 transitions. [2021-12-17 17:15:57,313 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 878 transitions. Word has length 256 [2021-12-17 17:15:57,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 17:15:57,314 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 878 transitions. [2021-12-17 17:15:57,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 21 states have internal predecessors, (121), 15 states have call successors, (66), 12 states have call predecessors, (66), 12 states have return successors, (65), 15 states have call predecessors, (65), 15 states have call successors, (65) [2021-12-17 17:15:57,314 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 878 transitions. [2021-12-17 17:15:57,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-12-17 17:15:57,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 17:15:57,320 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 9, 9, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 17:15:57,425 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 17:15:57,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 17:15:57,540 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 17:15:57,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 17:15:57,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1344466568, now seen corresponding path program 1 times [2021-12-17 17:15:57,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 17:15:57,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529364623] [2021-12-17 17:15:57,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 17:15:57,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms Killed by 15